Download PDF file - Trenwyth Industries

Trenwyth Available in colors, shapes and sizes
you won’t find anywhere else.
04
w w w . t r e n w y t h . c o m
architectural masonry units

Trenwyth Provides
Sustainable Solutions for
High-Profile Green Building Projects.
C-TEC (Career and Technology Education Centers), Newark, OH
Architect: L. Robert Kimball & Associates
Product: Astra-Glaze-SW+ ® – Antique Lace and Willow Green
Verastone ® Recycled Ground Face
Photo courtesy Scott Pease/Pease Photography
architectural masonry units
www.trenwyth.com

The highest quality
architectural masonry units
in custom shapes, sizes and colors
you won’t find
anywhere else.
Trenwyth concrete masonry units offer you
the ultimate in quality, design flexibility and
installation ease. With this binder as your
guide, you can explore endless possibilities to
create exceptional design — with the help of
America’s leader in architectural concrete
masonry units.
Contact us for
a Box Lunch
Presentation
architectural masonry units
w w w. t r e n w y t h . c o m

04
Trenwyth
architectural
masonry
units
Contents
Design Guide
Sustainable Solutions
Astra-Glaze-SW+ ®
glazed masonry units
Verastone ®
recycled ground face masonry units
Verastone ®
Plus
recycled filled & polished masonry units
Trendstone ®
ground face masonry units
Trendstone Plus ®
filled & polished ground face masonry units
Verastone ®
recycled masonry units
Mesastone ®
textured masonry units
Monumental
over-sized masonry units
Textured
Acousta-Wal ®
sound-absorbing masonry units
General Information
Control joints, alignment, mortar, field coating, ect.
architectural masonry units
www.trenwyth.com
contact us for
an AIA Continuing
Education Box Lunch
Presentation

ecycled architectural masonry unıts
committed to sustainable design –
Trenwyth naturally green recycled products.

Naturally
Green
… the quality, innovation and service
you need for your LEED ® projects...
or any project!
The leader in premium architectural masonry units is
also on the leading edge of Green Design. At Trenwyth,
we are constantly bringing to market new products that
contribute to the development of Green Building
practices, the enhancement of sustainable design and
lower life cycle building costs.
Extracted, processed and manufactured regionally,
Trenwyth masonry units are naturally green. Couple
that with the structural integrity, durability and vast array
of shapes, sizes and colors we offer, and you have
premium products that give you the design and
application flexibility to express yourself creatively
and deliver exceptional solutions.
recycled architectural masonry units
www.trenwyth.com

Table of Contents
Sustainable Solutions
architectural masonry units
Environmental Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SS 1
LEED ® Points Applicable to Trenwyth Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SS 2
Trenwyth Products that may earn LEED ® Points for your building. . . . . . . . . . . . . . . . SS 3
w w w. t r e n w y t h . c o m
S S T O C

Environmental
Statement
architectural masonry units
Serving markets in the United States, Canada and the
United Kingdom, Trenwyth Industries manufacturers
high-quality architectural concrete masonry units at our
production facilities located in Pennsylvannia, Illinois
and Arizona. In everything we do at Trenwyth, we are
committed to working toward a cleaner, better world.
From the natural products we manufacture to our
manufacturing processes, we strive to work in
harmony with the world in which we live.
Trenwyth Products Provide
Sustainable Solutions
Energy Efficient – Our high thermal mass concrete
masonry walls have a significant impact on the
reduction of energy consumption. Trenwyth concrete
masonry walls remain warm or cool long after the
heat or air-conditioning is turned off. This effectively
reduces heating and cooling loads, shifting them to
off-peak hours and, therefore, reducing environmental
and economic impact associated with excessive
energy use.
Indoor Air Quality – Concrete masonry does not
provide a food source for mold. Manufactured with an
approved moisture-resistant CMU additive, Trenwyth
concrete masonry units are mold and moisture
resistant, avoiding the exposure of potentially
hazardous pollutants that may adversely affect
the air quality for building occupants
No Toxic Fumes – When concrete blocks are painted,
harmful vapors are given off. Recent studies show
these vapors to be dangerous to inhabitants of the
space while the paint is being applied as well as during
the curing stage. Trenwyth masonry units provide an
attractive finished surface in a one-step installation
process. There’s no need to paint; therefore, at no time
is there an environmental hazard to inhabitants.
Insulated – Trenwyth offers efficient, permanent
insulation in the cores of its many products. In
addition, Trenwyth leads the charge in experimenting
with innovative concrete blocks designed to increase
the blocks’ effective insulative value.
Recycled Content – Trenwyth has developed
architectural concrete masonry units that contain a
significant amount of pre-consumer recycled content in
order to eliminate the negative impact on the
environment and its occupants.
Fire Protection – Trenwyth concrete masonry units offer
up to a 4-hour rating depending on the thickness and
internal configuration of the block.
Manufacturing
Of the Earth – Trenwyth produces high quality
architectural masonry units made largely from cement,
sand, gravel and other natural aggregates. Unlike
alternative forms of construction using steel frame or
wood, concrete block construction does not require
the destruction of natural resources to provide its
raw materials.
No Pollution – Trenwyth’s manufacturing operations are
designed to run smoothly and efficiently with no toxic
or hazardous byproducts.
In the Office
Conserve, Reuse, Recycle – Throughout our
administration and sales operations, we work hard to
not only recycle paper, metal and glass byproducts,
but also conserve and reuse whatever materials
we can.
Commitment to the Environment
As an astounding 40% (3 billion tons) of raw materials
are consumed globally each year, Trenwyth Industries
is committed to using resources wisely and protecting
the quality of our environment and the health and
safety of its occupants.
Trenwyth is committed to the research and
development of products that will contribute to the
development of green building practices and the
enhancement of sustainable design and lower life
cycle building costs.
Control Noise Pollution – Trenwyth’s Acousta-Wal ®
sound-absorbing masonry units actually absorb
unwanted sound that would otherwise be reflected
back into the environment as noise.
w w w. t r e n w y t h . c o m
S S 1

architectural masonry units
LEED ® Points
Applicable to
Trenwyth Products
Category: Materials & Resources (MR 4.1) LEED ® Point: 1
Description: Recycled Content
Trenwyth recycled cmu contains a significant amount of pre-consumer recycled content.
Determined by weight (%), the sum of the post-consumer recycled content plus one-half of
the pre-consumer recycled content constitutes at least 10% (based on cost) of the total
value of all materials used in the project.
Category: Materials & Resources (MR 4.2) LEED ® Point: 1
Description: Recycled Content
Trenwyth recycled cmu contains a significant amount of pre-consumer recycled content.
Determined by weight (%), the sum of the post-consumer recycled content plus one-half of
the pre-consumer recycled content constitutes an additional10% beyond Credit MR 4.1
(20% total) based on the cost of the total value of all materials used in the project.
Category: Materials & Resources (MR 5.1) LEED ® Point: 1
Description: Regional Materials
Trenwyth materials are regionally extracted, processed and manufactured within 500 miles
of the project site. At least 10% (based on cost) of the total materials used on the project
must be extracted, processed and manufactured within 500 miles from the project site.
Category: Materials & Resources (MR 5.2) LEED ® Point: 1
Description: Regional Materials
Trenwyth materials are regionally extracted, processed and manufactured within 500 miles
of the project site. An additional 10% beyond Credit MR 5.1 (20% total based on cost) of
the total materials used on the project must be extracted, processed and manufactured
within 500 miles from the project site.
Category: Indoor Environmental Quality (EQ 4.1) LEED ® Point: 1
Description: Low Emitting Materials: Adhesives & Sealants
TRENDCOAT ® WB water-based sealant used on Trenwyth ground face and filled &
polished concrete masonry units emits low VOC’s, therefore, reducing indoor air
contaminants that are odorous, irritating and/or harmful to the comfort and well-being of
installers and building occupants.
w w w. t r e n w y t h . c o m
S S 2

Trenwyth products
may earn LEED ® Points for Your Building!
LEED Category
Materials &
Resources
Materials &
Resources
Indoor Environmental
Quality
LEED Credit
Recycled Content
(MR credit 4.1/4.2)
Regional Materials
(MR credit 5.1/5.2)
Low Emitting Matls:
Adhesives & Sealants
(IEQ credit 4.1)
Description
Pre-Consumer
Recycled Content
Regionally Extracted,
Processed &
Manufactured within
500 Miles of the
Project Site
TRENDCOAT ® WB
(water based) emits
low VOC's
LEED Points 1-2 Points 1-2 Points 1 Point
TRENWYTH PRODUCTS
Astra-Glaze SW+ ® glazed • •
Verastone ® recycled ground face • • •
Verastone ® Plus recycled filled & polished • • •
Verastone ® Textured recycled • •
Trendstone ® ground face • •
Trendstone Plus ® filled & polished • •
Mesastone ® textured
Split Face
•
•
Acousta-Wal ® / Astra-Glaze SW+ ® glazed • •
Acousta-Wal ® / Verastone ® recycled ground face • • •
Acousta-Wal ® / Trendstone ® ground face • •
Acousta-Wal ® / Gray Block • •
w w w. t r e n w y t h . c o m
S S 3

Astra-Glaze-SW+ ®
glazed masonry units
the perfect solution
for durability, moisture / mold resistance,
easy maintenance and aesthetics.

04
Astra-Glaze-SW+ glazed units are lightweight or medium weight masonry units
with a thermosetting glazing compound permanently molded to one or more faces.
Upon request, Astra-Glaze-SW+ is available with pre-consumer recycled content.
Astra-Glaze-SW+ ® advantages at a glance
Recycled Content Extracted, processed and manufactured regionally, Astra-Glaze-SW+ glazed masonry units
contain a significant amount of pre-consumer recycled content that may contribute LEED
Green Building Rating Points ® to your building.
One-Step Installation Single trade installation of finished load-bearing or non-load-bearing walls saves time
and money.
Permanent Glazing Astra-Glaze-SW+ is cured and heat-treated in gas-fired tunnel kilns that enable the glazed
surface to become an integral part of the unit.
Dimensional Uniformity Glazed facings are molded individually to ensure uniformity regardless of minor variations
in the unit.
Durability Weather resistant and colorfast, Astra-Glaze-SW+ resists abrasion, impact, chemicals,
cracking and crazing.
Moisture / Mold Resistant Manufactured with an integral water repellent admixture, Astra-Glaze-SW+ is ideal for
high-moisture and sanitary environments.
Easy to Clean The block’s permanent impervious satin glazed finish with built-in protectants resists
staining. The toughest dirt and stains – even graffiti – wipe off easily.
Impervious Surface With its tight impervious surface, Astra-Glaze-SW+ is the optimal solution for sanitary, clean
room environments.
Low Maintenance Virtually maintenance free, the Astra-Glaze-SW+ finish will last the lifetime of your building
with no refinishing.
Colors, Shapes & Astra-Glaze-SW+ is available in an extraordinary color palette, as well as custom colors
Scoring Patterns and a wide variety of shapes and scoring patterns for maximum design flexibility.
Fire Protection Astra-Glaze-SW+ offers up to a 4-hour fire rating, depending on the thickness and internal
configuration of the block.
ADA Compliant Astra-Glaze-SW+ is available with rounded corners and edges for ADA compliance.
Sound-Absorbing Option Astra-Glaze-SW+ glazed masonry units are available in Acousta-Wal ®
sound-absorbing units.
Visit our new Astra-Glaze-SW+ website, www.astraglaze.com.
Astra-Glaze-SW+ ®
glazed masonry units

Table of Contents
Astra-Glaze-SW+ ®
architectural masonry units
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AG 1
R-Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AG 2 – 5
ASTM Reports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AG 6 – 7
Block Characteristics/Fire Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AG 8
Design Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AG 9 – 16
Mortars & Mortar Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AG 17
Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AG 18 – 20
Patching Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AG 21
Cleaning Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AG 22 – 23
Shapes & Sizes Coding System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AG 24
Shapes & Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AG 25 – 27
Scoring Patterns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AG 28
Frequently Asked Questions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AG 29 – 35
Astra-Glaze-SW+ ® Colors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AG 36
w w w. t r e n w y t h . c o m
A G T O C

This page intentionally left blank

Astra-Glaze-SW+ Specifications
PART 1 – GENERAL
SUBMITTAL
Submit color samples for selection from manufacturer’s
series. Submit product literature, certifications, test reports,
full size sample(s) of each color specified or selected.
Custom colors are available. Contact Trenwyth
(800-233-1924) for details.
QUALITY ASSURANCE
All glazed masonry units shall be Trenwyth Astra-Glaze-
SW+ units manufactured by Trenwyth manufacturing
facilities. Glazed concrete blocks manufactured in
Pennsylvania shall be lightweight units conforming to ASTM
C90. Glazed concrete blocks manufactured in Arizona shall
be medium weight units conforming to ASTM C90. The
glazed surface shall have a smooth satin-gloss finish,
externally heat-polymerized cast-on facing conforming to
ASTM C744-08 and all applicable Federal Specifications.
All Trenwyth units are manufactured with an approved
integral water repellent CMU admixture.
All Astra-Glaze-SW+ are manufactured with
pre-consumer recycled material. Contact Trenwyth
(800-233-1924) for details..
Fire Resistance: Fire rated for up to 4 hours. Define
hourly ratings required by NCMA TEK Notes, available
at www.trenwyth.com.
Field Constructed Mock-ups: Construct a sample panel, no
less than 4' x 4', of units of each color and size to be used
in the project.
A full size unit is required to illustrate color and texture for
approval. Manufacturer requires that a sample panel be
installed at the jobsite prior to installation of any Trenwyth
product. This panel will represent both the quality of the
product and the workmanship to be expected for the
project. The panel must be approved by either the owner
or architect for the project. Manufacturer will provide 4"
units for a 4' by 4' sample panel at no cost for the material
(excluding freight to site).
DELIVERY, STORAGE AND HANDLING
Glazed masonry units shall be delivered to the jobsite on
banded pallets with individual protective covers on each
glazed block face. Keep protective block covers on the
blocks until installation. Store pallets in single stacks on
level ground and cover with waterproof covering (e.g.,
tarpaulins) to protect the blocks from inclement weather.
Handle blocks carefully to avoid breakage and damage
to the finished surface.
PROJECT SITE CONDITIONS
Protection of Work: Cover walls each day after installation
to keep open walls protected and dry. After units are
installed they should be protected from damage by other
trades performing operations that can stain or otherwise
damage the finished surfaces by covering walls with plastic.
Corners should be protected from damage after installation
by covering them with plywood.
PART 2– PRODUCTS
PRODUCT NAME
Astra-Glaze-SW+ ® glazed concrete masonry units
MANUFACTURER
Anchor Concrete Products (800) 233-1924
One Connelly Road • Emigsville, PA 17318
Superlite Block (800) 331-9823
4626 N. 42nd Avenue • Phoenix, AZ 85019
w w w. t r e n w y t h . c o m
RELATED MATERIALS
Colored matching or contrasting mortar is available from
manufacturer. Consult NCMA TEK Notes, available at
www.trenwyth.com, for mortar type and specifications. Use
manufacturer-approved matching water-repellent mortar
additive, following manufacturer’s instructions, in all exterior
mortar. Consult manufacturer for recommendations.
In areas that are exposed to excessive moisture, we
recommend joints to be raked and filled with BONSAL
B-7000 EPOXY. See Mortar Bedding and Jointing for details.
SIZES AND SHAPES
Actual facing dimensions shall be 7-3/4" x 15-3/4" forming
a 1/16" lip around the edges of a modular 7-5/8" x 15-5/8"
block. Nominal 2", 4", 6", 8", 10" and 12" standard block
thickness shall be used as required, as well as standard
and special block shapes. Basic units may include
stretchers, jambs, caps and cove bases. Other possible
face dimensions are nominal 16" x 16", 12" x 12", 8" x 18",
4" x 16", 8" x 8". Semi-solid and solid units shall be used
where specified and/or shown on the drawings.
MASONRY CLEANERS
Carefully following the manufacturer’s instructions, use
Custom Burnished Masonry Cleaner by PROSOCO (dilute
1 part to 3 parts clean water). Available from manufacturer.
Do not powerwash.
CAUTION! The following solvents must never be used as
they may damage Astra-Glaze-SW+ block facings: paint
remover, lacquer thinner, epoxy thinner, methylene chloride,
acetone, muriatic acid. Contact your Trenwyth
representative for recommendations for hard to clean areas.
PART 3 – EXECUTION
LAYING MASONRY WALLS
Draw blocks from more than one pallet at a time during
installation. All exterior mortar shall include manufacturerapproved
water-repellent additive added to each batch in
the appropriate dosage rates for mortar type (M, S or N)
per manufacturer’s instructions. Refer to NCMA TEK Notes,
available at www.trenwyth.com, for Hot and Cold weather
construction practices.
Lay Astra-Glaze-SW+ blocks with the faces level, plumb
and true to a line strung horizontally at the glazed face.
Install only quality units; reject all defective units, as defined
in ASTM C744. Units shall have uniform face joint
dimensions of 1/4" both horizontally and vertically. Tool
joints neatly after they are finger-hard to make them straight
and uniform. Size and place cut pieces appropriately to
maintain consistency and bond. Complete masonry
construction using procedures and workmanship
consistent with the best masonry practices.
INSTALLATION
Lighting: Provide adequate lighting for masonry work by
placing all lighting at a reasonable distance from the wall for
even illumination. Do not use trough lighting.
Base Course: Align base course properly on the floor slab.
Cove Base: Keep the cove base tight to the slab if vinyl
floor tile is to be installed. For thicker flooring, raise cove
base units to the desired height.
Cutting: Make all unit cuts, including those for bonding,
holes, boxes, etc., with motor driven masonry saws, using
either an abrasive or diamond blade. Cut neatly and locate
for best appearance.
MORTAR BEDDING AND JOINTING
1. Lay units with full mortar coverage on head and bed
joints taking care not to block cores to be grouted or
filled with masonry insulation.
2. Tool all mortar joints when thumbprint hard into a
concave configuration.
3. Care should be taken to remove mortar from the face
of masonry units before it sets.
4. Tuckpoint the joints of scored units for proper
appearance. All exterior scored units must be tuckpointed
to prevent water penetration. Rake back the joint when
epoxy (Bonsal/Laticrete) is used on select jobs that
require better moisture prevention. NO RAKE JOINTS.
Various masonry mortars may be used with
Astra-Glaze-SW+ concrete masonry units depending on
specific structural requirements for the finished walls. We
recommend a matching water-repellent mortar additive
(available for purchase from manufacturer). Follow
manufacturer’s instructions in all mortar applications.
EPOXY FINISHED JOINTS
In areas exposed to excessive moisture, make sure to
tool mortar joints with a minimum of 1/4" and tuckpoint
with an approved water-resistant grout. A typical
tuckpointing grout is BONSAL ® POLYMER MODIFIED
SANDED TILE GROUT mixed with the BONSAL B-7000
EPOXY. Do not add water or anything else in addition to the
B-7000, which will make it a 100% solid enabling it to be
acid and stain resistant.
Recommendation for using BONSAL ® – DO NOT FLOAT
GROUT ACROSS GLAZED SURFACE. THE PROPER
TECHNIQUE IS TO POINT OR USE A MORTAR GUN!
FLASHING OF MASONRY WORK
Install flashing at locations shown in the plans and in
strict accordance with the details and the best masonry
flashing practices.
WEEP HOLES AND VENTS
Install weep holes and vents at proper intervals at courses
above grade and at any water stops over windows, doors
and beams. Consult NCMA TEK Notes, available at
www.trenwyth.com, for additional information on flashing.
INSPECTION
The glazed facing shall conform to the requirements of
ASTM C744 when viewed from a distance of five (5) feet at
right angles to the wall with normal lighting. The concrete
masonry units on which the glaze is molded shall conform
to the requirements of ASTM C90.
CLEANING
Keep walls clean daily during installation using brushes
or rags and a clean damp cloth. Harsh cleaning methods
after walls have been erected may mar the surface of the
blocks. Do not allow excess mortar lumps or smears
to harden on the glazed surfaces. Remove green mortar
with a dry cloth. Do not use steel wool, sandpaper or
other abrasives.
FINAL CLEANDOWN
Clean the completed walls with Burnished Custom
Masonry Cleaner by PROSOCO 3:1 solution, carefully
following manufacturer's washdown instructions —
including thorough rinsing. Do not use acid or abrasives
on the glazed surfaces.
MAINTENANCE
Astra-Glaze-SW+ units, properly installed and cleaned,
need virtually no maintenance other than routine cleaning
with typical non-abrasive household cleaner. Graffiti, paint
or dye may need special cleaning methods and products
such as Trenwyth Graffiti Wizard ® environmentally friendly
cleaner. Contact manufacturer for specific cleaning
recommendations. Do not powerwash.
INSTALLATION RECOMMENDATIONS
• For walls with a glazed finish on both sides, use two
single-faced units. Because masonry units are typically
installed aligning one side, the second side of double
faced units is almost invariably misaligned. Double-faced
units are not recommended. Manufacturer accepts no
responsibility for face alignment.
• Cavity wall construction is recommended for exterior
walls, with proper flashing, venting and weep holes.
• For best appearance, use stack bond construction when
stack bond appearance is desired (as opposed to scored
units in running bond).
• All exterior mortar joints must contain a manufacturerapproved
water repellent additive.
• For best appearance and water resistance, tuckpoint
scored joints on interior and exterior applications.
• Colored matching or contrasting mortar / epoxy is
available when using colorful Astra-Glaze-SW+ units.
Contact your Trenwyth representative for information.
A G 1

This page intentionally left blank

R-Values
Astra-Glaze-SW+ ®
architectural masonry units
R-values of concrete masonry walls are correlated to concrete density, since thermal conductivity of
concrete increases with increasing density. The following tables list a range of R-values for each density.
Contact your Trenwyth representative for specific block densities.
Table 2 — R-Values For 6 in. (152 mm) Concrete Masonry Walls, hr . ft 2.o F/Btu a
Cores filled with:
Density of
concrete
Cores empty
Perlite
Loose-fill insulation
Vermiculite
Polyurethane
foamed insulation
Solid grouted
Construction
Exposed
block, both
sides
pcf range mid range mid range mid range mid range mid
85 2.2-2.5 2.4 4.8-6.1 5.3 4.5-5.6 5.0 5.2-7.0 5.9 1.6-1.8 1.7
95 2.1-2.4 2.2 4.1-5.4 4.6 3.9-5.0 4.3 4.4-6.1 5.0 1.5-1.7 1.6
105 2.0-2.2 2.1 3.5-4.8 4.0 3.3-4.5 3.8 3.7-5.2 4.3 1.4-1.6 1.5
115 1.8-2.1 2.0 3.0-4.2 3.4 2.9-4.0 3.3 3.1-4.5 3.6 1.4-1.5 1.4
125 1.7-2.0 1.8 2.5-3.7 3.0 2.5-3.5 2.9 2.6-3.9 3.1 1.3-1.5 1.4
135 1.6-1.9 1.7 2.2-3.2 2.6 2.2-3.1 2.5 2.2-3.4 2.7 1.3-1.4 1.3
Table 3 — R-Values For 8 in. (203 mm) Concrete Masonry Walls, hr . ft 2.o F/Btu a
Cores filled with:
Density of
concrete
Cores empty
Perlite
Loose-fill insulation
Vermiculite
Polyurethane
foamed insulation
Solid grouted
Construction
Exposed
block, both
sides
pcf range mid range mid range mid range mid range mid
85 2.4-2.7 2.5 6.3-8.2 7.1 5.9-7.5 6.6 6.9-9.4 8.0 1.9-2.1 2.0
95 2.3-2.6 2.4 5.3-7.2 6.1 5.0-6.7 5.7 5.8-8.1 6.7 1.7-2.0 1.8
105 2.1-2.4 2.2 4.5-6.3 5.2 4.3-5.9 4.9 4.8-7.0 5.6 1.6-1.9 1.7
115 2.0-2.3 2.1 3.8-5.5 4.4 3.7-5.2 4.3 4.0-6.0 4.7 1.5-1.8 1.6
125 1.9-2.2 2.0 3.2-4.8 3.8 3.1-4.6 3.7 3.3-5.1 4.0 1.5-1.7 1.5
135 1.7-2.1 1.9 2.7-4.2 3.3 2.7-4.0 3.2 2.8-4.4 3.4 1.4-1.6 1.5
w w w. t r e n w y t h . c o m
A G 2

R-Values
Astra-Glaze-SW+ ®
architectural masonry units
Table 4 — R-Values For 10 in. (254 mm) Concrete Masonry Walls, hr . ft 2.o F/Btu a
Cores filled with:
Density of
concrete
Cores empty
Perlite
Loose-fill insulation
Vermiculite
Polyurethane
foamed insulation
Solid grouted
Construction
Exposed
block, both
sides
pcf range mid range mid range mid range mid range mid
85 2.5-2.9 2.7 7.5-9.9 8.5 7.0-9.1 7.9 8.2-11.3 9.5 2.1-2.4 2.2
95 2.4-2.7 2.5 6.3-8.7 7.2 6.0-8.0 6.8 6.7-9.7 7.9 1.9-2.2 2.0
105 2.2-2.5 2.3 5.2-7.5 6.1 5.0-7.0 5.8 5.5-8.2 6.6 1.8-2.1 1.9
115 2.1-2.4 2.2 4.4-6.5 5.2 4.2-6.2 5.0 4.6-7.0 5.5 1.7-2.0 1.8
125 1.9-2.3 2.1 3.7-5.6 4.4 3.6-5.4 4.3 3.8-6.0 4.6 1.6-1.9 1.7
135 1.8-2.1 2.0 3.1-4.9 3.7 3.0-4.7 3.6 3.2-5.1 3.9 1.5-1.8 1.6
Table 5 — R-Values For 12 in. (305 mm) Concrete Masonry Walls, hr . ft 2.o F/Btu a
Cores filled with:
Density of
concrete
Cores empty
Perlite
Loose-fill insulation
Vermiculite
Polyurethane
foamed insulation
Solid grouted
Construction
Exposed
block, both
sides
pcf range mid range mid range mid range mid range mid
85 2.6-3.0 2.8 9.1-12.1 10.3 8.5-11.0 9.6 10.0-13.8 11.5 2.3-2.6 2.4
95 2.4-2.8 2.6 7.6-10.5 8.8 7.2-9.7 8.2 8.2-11.8 9.6 2.1-2.4 2.3
105 2.3-2.6 2.4 6.3-9.1 7.4 6.0-8.5 7.0 6.7-10.0 8.0 2.0-2.3 2.1
115 2.1-2.5 2.3 5.2-7.9 6.2 5.1-7.4 6.0 5.5-8.5 6.6 1.9-2.2 2.0
125 2.0-2.3 2.2 4.4-6.8 5.3 4.2-6.5 5.1 4.5-7.2 5.5 1.8-2.0 1.9
135 1.9-2.2 2.0 3.6-5.8 4.4 3.6-5.6 4.3 3.7-6.1 4.6 1.7-1.9 1.8
Information based on data published by the National Concrete Masonry Association. See NCMA TEK Note
6-2A, available at www.trenwyth.com.
w w w. t r e n w y t h . c o m
A G 3

R-Values
Astra-Glaze-SW+ ®
architectural masonry units
Additional r-values can be achieved with factoryinstalled
expanded polystyrene, such as Korfil or
ICON inserts.
Korfil ® Block Insulation inserts are individually
molded expanded polystyrene inserts. Installed at
your Trenwyth manufacturing facility, Korfil insulation
inserts are designed to fit standard two-core
masonry units. Korfil inserts are available in 6", 8",
10" and 12" widths.
R-Values
Both Korfil and ICON inserts offer your building the
following benefits:
• One-step installation of insulated masonry block
saves time and money.
• R-value unaffected by moisture or aging
• Insulated block offers up to a 4-hour fire rating
• Improves dew point and sound transmission
resistance
• Offers space for easy installation of utilities
within wall
• Flame retardant polystyrene
• Use with single-wythe and cavity
wall construction
• No maintenance required
• Available in 6", 8", 10" and 12" widths.
Caution: Expanded Korfil polystyrene should not be
exposed to temperatures exceeding 184ºF.
Applicable Standards:
• ASTM C578 Specification for Rigid Cellular
Polystyrene Thermal Insulation
• ASTM C90 Standard Specification for
Loadbearing Concrete Masonry Units
ICON ® Universal Concrete Block Insulation
Inserts are molded from expandable polystyrene.
Pre-fit at your Trenwyth manufacturing facility, ICON
inserts are designed to compress and fit the core of
all masonry units and significantly improve cmu
thermal efficiency.
w w w. t r e n w y t h . c o m
A G 4

R-Values
Astra-Glaze-SW+ ®
architectural masonry units
6" Two-Core Masonry Unit
Density of
Cores Empty Cores Insulated
Block - lbs/ft 9 R t U R t U
80 2.64 .38 6.45 .16
95 2.42 .41 5.39 .19
105 2.29 .44 4.76 .21
115 2.17 .46 4.21 .24
125 2.05 .49 3.69 .27
135 1.95 .51 3.25 .31
12" Two-Core Masonry Unit
Density of
Cores Empty Cores Insulated
Block - lbs/ft 9 R t U R t U
80 3.12 .32 9.38 .11
95 2.83 .35 8.09 .12
105 2.66 .38 7.27 .14
115 2.52 .40 6.51 .15
125 2.38 .42 5.78 .17
135 2.26 .44 5.11 .20
8" Two-Core Masonry Unit
Density of
Cores Empty Cores Insulated
Block - lbs/ft 9 R t U R t U
80 2.86 .35 7.74 .13
95 2.61 .38 6.55 .15
105 2.46 .41 5.83 .17
115 2.33 .43 5.17 .19
125 2.21 .45 4.56 .22
135 2.10 .48 4.01 .25
12" Cavity Wall, 4" Outer Wythe,
3/4 Air Space, 8" Two-Core Block
Density of
Cores Empty Cores Insulated
Block - lbs/ft 9 R t U R t U
80 4.26 .23 9.14 .11
95 4.01 .25 7.95 .13
105 3.86 .26 7.23 .14
115 3.73 .27 6.57 .15
125 3.61 .28 5.96 .17
135 3.50 .29 5.41 .28
10" Two-Core Masonry Unit
Density of
Cores Empty Cores Insulated
Block - lbs/ft 9 R t U R t U
80 3.00 .33 8.52 .12
95 2.73 .37 7.25 .14
The r-values and u-values are based on
information provided by insert manufacturer,
CBIS. Values are based on ASHRAE and
NCMA publications.
For more information, contact your Trenwyth
representative or visit www.cbisinc.com.
105 2.57 .39 6.48 .15
115 2.43 .41 5.76 .17
125 2.31 .43 5.09 .20
135 2.19 .46 4.48 .22
w w w. t r e n w y t h . c o m
A G 5

ASTM Reports
Astra-Glaze-SW+ ®
architectural masonry units
ASTM C744 specifies the following tests for pre-faced glazed concrete masonry units
Cracking and Crazing
Resistance to Staining and Chemicals
Adhesion
Abrasion
Color Change
Soiling and Cleansability
Efflorescence
Dimensional Tolerances
Face Variation
Depth Variation
Distortion of Facing
Surface
Flame Spread Index *
Smoke Development **
A test to ensure that the units are free from
cracking and/or crazing.
Testing of various chemicals, i.e.,
detergents, solvents, etc., in
concentrations set by ASTM standards and
ASTM requirements.
A test to determine the adhesion of the
glazed facing to the block substrate.
A test to measure the abrasion resistance
of the glazed facing.
A test by accelerated weathering apparatus
to measure color fading or change.
A test to determine how easily the glazed
surface can be cleaned.
A test to ensure that unsightly soluble salts
do not migrate to the surface when
moisture is present.
A test to ensure that variations in the sizes
of the blocks in all dimensions are less than
1/16".
A test to ensure that the glazed facing
dimensions do not vary more than 1/16".
A test by measurements to ensure that the
thickness of the pre-faced block are within
1/16" of the specified size.
A test by measurements to ensure that the
glazed facing is straight, true and in plane
within 1/16".
A laboratory inspection for quality of the
face (no imperfection).
A test to determine how much the glazed
facing will allow flame to spread in a fire.
A test to determine the amount of smoke
given off by the glazed facing in a fire.
Complies
Complies
Complies
Complies
Complies
Complies
Complies
Complies
Complies
Complies
Complies
Complies
Complies
Complies
* The test method specified in ASTM E84 is used to determine surface burning characteristics.
** In this test, red oak is given a value of 100 and asbestos cement board is given a value of 0 to calibrate the test equipment.
w w w. t r e n w y t h . c o m
A G 6

ASTM Reports
Astra-Glaze-SW+ ®
architectural masonry units
ASTM C90 specifies the following test for load-bearing concrete masonry units
Compressive Strength and
Moisture Absorbency
Aging and Thermal Shock
Acid Rain Test
Diesel Fume Exhaust Test
Waste Water Treatment Plant Test
A test to ensure that blocks meet strength
and moisture requirements and are free of
cracks and other defects.
Canadian Standard CSA-CAN3-A165.3-M85
A test to ensure that no cracking, spalling,
crazing or blistering of the glaze occurs
when the unit is subject to cycles of
thermal shock at 0º and 93º C.
Other Tests
A test to ensure that acid rain does not
mar the face of Astra-Glaze-SW+ blocks.
A test to measure the effect of prolonged
diesel fume exhaust on the facing of Astra-
Glaze-SW+ blocks.
A test to ensure that the glazed facing is
not affected by chemicals found in waste
water treatment plant environments.
Complies
Complies
Complies
Complies
Complies
Industry-Specific Testing
Industry-specific certificate of analysis testing has been completed for Astra-Glaze-SW+ glazed masonry units by Froehling and
Robertson, Inc. Laboratories. Astra-Glaze-SW+ units successfully pass chemical and medical agents, steam, fuel and detergent
testing in:
• Veterinary Hospitals & Clinics
• Animal Shelters
• Power Plants
• Machine Shops
• Heating Plants
• Control Labs
• Brewing & Distilling Industries
• Wash Rooms & Showers
• Laundry Rooms
• Dairy Industry
• Jails
• Meat Packagers
• Slaughter Houses
• Seafood Industries
• Kitchens & Food Preparation Facilities
• Dish Washing Bars
w w w. t r e n w y t h . c o m
A G 7

architectural masonry units
Block Characteristics
Fire Rating
Astra-Glaze-SW+ ®
Fire resistance ratings can be calculated using a method that multiplies the percent of solid material in the
concrete masonry unit by the actual thickness (in inches) of the blocks to determine the hourly rating for the
type of aggregate used. Contact your Trenwyth representative for specific fire ratings.
FIRE RESISTANCE RATINGS/MINIMUM REQUIRED EQUIVALENT INCHES
Aggregate Type in
The Concrete Masonry Unit
Fire Resistance
0.5 Hr. 0.75 Hr. 1 Hr. 1.5 Hr. 2 Hr. 3 Hr. 4 Hr.
Calcareous or siliceous gravel 2.0 in. 2.4 in. 2.8 in. 3.6 in. 4.2 in. 5.3 in. 6.2 in.
Limestone, cinders or slag 1.9 in. 2.3 in. 2.7 in. 3.4 in. 4.0 in. 5.0 in. 5.9 in.
Expanded clay, shale or slate 1.8 in. 2.2 in. 2.6 in. 3.3 in. 3.6 in. 4.4 in. 5.1 in.
Expanded slag or pumice 1.5 in. 1.9 in. 2.1 in. 2.7 in. 3.2 in. 4.0 in. 4.7 in.
Calculating "Equivalent Thickness" is simply determining what the block thickness would be if the same
amount of material contained in a hollow unit were re-molded without core holes.
Nominal Width
(Inches)
EQUIVALENT THICKNESS OF CONCRETE MASONRY UNITS (IN INCHES)
Based on Typical
Hollow Units (1)
Equivalent Thickness
Based on Percent Solid
(75% - semi-solid) (100% - solid)
4 2.68 (73.8%) 2.72 3.625
6 3.09 (55.0%) 4.22 5.625
8 4.04 (53.0%) 5.72 7.625
10 4.98 (51.7%) 7.22 9.625
12 5.77 (49.6%) 8.72 11.625
CALCULATING ESTIMATED FIRE RESISTANCE EXAMPLE
An 8" hollow masonry wall is constructed of expanded slag units reported to be 53%* solid. What is the
estimated fire resistance of the wall (modular units)?
Equivalent Thickness = % solid x depth
Example: .53 x 7.625 in. = 4.04 inches
From Table: 3 hr. Fire Resistance requires 4.0 inches
*Percentage solid can be calculated from net area or net volume as determined by ASTM C140
“Methods of Testing Concrete Masonry Units”.
(1) Information based on data published by the National Concrete Masonry Association in NCMA TEK 7-1A,
available at www.trenwyth.com.
w w w. t r e n w y t h . c o m
A G 8

Design Details
Astra-Glaze-SW+ ®
architectural masonry units
WING WALL
8ST
4JO
More Expensive
Flush
8ST
Less Expensive
Wrap Around Door Frames.
Save Two Expensive Shapes.
CCJO
CCO
Use 2” shapes on
the top and end.
CCO
VGCCO
TWO FACED
STRETCHERS
DOUBLE FACED BLOCKS
An Astra-Glaze-SW+ double faced concrete masonry unit is a single concrete block with a glazed face on
both sides. The use of double faced units affords significant cost savings -- walls finished on both sides
are completed in a single operation.
PLEASE NOTE THE FOLLOWING LIMITATIONS:
Masons lay block or bricks to one side using a line. This means they are facing one side of the wall when
the masonry product is placed and cannot see what the other side looks like. Periodically, the mason can
check the opposite side and make slight adjustments -- but not major changes. If units are not aligned
properly on the face side of the wall, the error multiplies substantially on the opposite side. This is
amplified as the wall length increases. What is rather inconsequential on smaller wall lengths can become
significant on longer lengths. Manufacturer accepts no responsiblity for face alignment.
With the commonly used methods of laying masonry to one side of a wall, it can almost be assured one
side will be better aligned than the other.
Scoring is not recommended for double face units as it will compound any alignment imperfections.
w w w. t r e n w y t h . c o m
A G 9

Design Details
Astra-Glaze-SW+ ®
architectural masonry units
Column Details
16" X 16"
Column
4JP12
Almost any column size can be
made with 4JP12 units.
Eliminates the need for more
costly 8JP/JO units.
24" X 24"
Column
4S-DA-1
4JO12-DA-1
Use 4JO/JP12s
instead of 8JO’s
32" X 24"
Column
16" X 24"
Column
w w w. t r e n w y t h . c o m
A G 1 0

Design Details
Astra-Glaze-SW+ ®
architectural masonry units
BOND BEAM
Continuous
Reinforcing
Astra-Glaze-SW+
Bond Beam Unit
Around The Room
SCORED JOINTS
16" High
Astra-Glaze-SW+
Units
Scored Joints
w w w. t r e n w y t h . c o m
A G 1 1

Design Details
Astra-Glaze-SW+ ®
architectural masonry units
BULLNOSE JAMB MEETING
BULLNOSE SILL
8 JOX
Bullnose Jamb
8 M
Mitre Unit
8 COX
Bullnose Sill
TYPICAL 135º CORNER
135º
Steel Joint
Reinforcement
Reinforced
Corner
3 3/4"
11 3/4"
3 3/4"
w w w. t r e n w y t h . c o m
A G 1 2

Design Details
Astra-Glaze-SW+ ®
architectural masonry units
6" Wall Outside
Corner
2" Cut Plug
4JO12
6S
8" Wall Outside
Corner
4" Cut Plug
8S
4JP12
12" Wall Outside
Corner
4JP12
12S
w w w. t r e n w y t h . c o m
A G 1 3

Design Details
Astra-Glaze-SW+ ®
architectural masonry units
DOOR AND BASE DETAIL
‘A’
4" High
Glazed
Base
‘B’
7' 0"
Section ‘A’
Brick Module
4" 8"
1/4" Joint
Astra-Glaze-SW+ Units
Base Line For
Brick Coursing
Suited For Resilient
Tile Flooring
No Recess Required
Section ‘B’
w w w. t r e n w y t h . c o m
A G 1 4

Design Details
Astra-Glaze-SW+ ®
architectural masonry units
DOOR AND BASE DETAIL
Using standard Astra-Glaze-SW+ units:
Length of Unit
(Inches)
Depth of Unit
(Inches)
= Smallest Radius
(Without Cutting)
= Overhang*
(Inches)
7 5/8 3 5/8 6' 6" 7/64
11 5/8 3 5/8 9' 8" 5/32
7 5/8 7 5/8 8' 0" 3/32
15 5/8 7 5/8 15' 10" 5/32
*Overhang projection in running bond.
CURVED MASONRY WALLS
Using Radius blocks:
Standard 12” and 27" Radius Block Corner Detail
5 3/4"
12" R
12" or 27"
68" on 12"
75" on 27"
1"
8 5/8"
11 3/4"
3 3/4"
27" R
1"
14 1/8"
3 3/4"
w w w. t r e n w y t h . c o m
A G 1 5

Design Details
Astra-Glaze-SW+ ®
architectural masonry units
JAMB UNIT ALTERNATIVES
1. Astra-Glaze-SW+ jamb units are expensive.
2. The elimination of jamb units through the use of wrap-around or flush door frames reduces
cost substantially.
3. The use of a 7'2" door with a 7'4" flush frame works well with Astra-Glaze-SW+ units. The 7'2" door can
be used with a surface mounted door closer. The increased cost of a 7'2" door (as compared to a 7'0"
door) is more than compensated for by the fact that a surface-mounted door closer is less expensive
than the internal door closer which is required for shorter doors.
4. Use of the floor to ceiling wrap-around or flush door frames provide a “built-in” control joint for
expansion and contraction.
4" x 8" x 16" block
8S
4JO
8S
w w w. t r e n w y t h . c o m
A G 1 6

architectural masonry units
Mortars &
Mortars Joints
Astra-Glaze-SW+ ®
Recommended Mortars
Various masonry mortars may be used with Astra-
Glaze-SW+ concrete masonry units depending on
specific structural requirements for the finished walls.
Refer to NCMA TEK Notes, available at
www.trenwyth.com, for mortar details.
For all exterior mortar, use an approved
matching water repellent mortar additive (which
may be purchased from manufacturer.) Follow
manufacturer's instructions in all mortar applications.
Consult manufacturer for recommendations.
Epoxy Finished Joints
In areas exposed to excessive moisture, make sure
to tool mortar joints with a minimum of 1/4" and
tuckpoint with an approved water-resistant grout. A
typical tuckpointing grout is BONSAL ® POLYMER
MODIFIED SANDED TILE GROUT mixed with the
BONSAL B-7000 EPOXY. Do not add water or
anything else in addition to the B-7000, which
will make it a 100% solid enabling it to be acid
and stain resistant.
DO NOT FLOAT GROUT ACROSS GLAZED
SURFACE AS THIS MAY CAUSE DAMAGE
TO THE GLAZED FACE. WHEN USING AN
EPOXY GROUT, THE PROPER TECHNIQUE
IS TO TUCKPOINT USING A MORTAR GUN
OR BAKER'S BAG!
Mortar Joints
The proper mortar joint size to use when laying Astra-Glaze-SW+ blocks is 1/4" at the face and 3/8" joints in
the concrete block backing.
It is important to realize that the glazed facing overlaps the concrete masonry units and is larger than the
block itself. Lay all Astra-Glaze-SW+ units to the face ensuring 1/4" joint measured from the center to
center of adjacent edge radii. See below.
Base Block
3/8”
1/4"
Glazed Facing
w w w. t r e n w y t h . c o m
A G 1 7

Installation
Astra-Glaze-SW+ ®
architectural masonry units
IMPORTANT! Before You Begin
Manufacturer requires that you order a full size unit
to illustrate color for approval. Manufacturer also
requires a sample panel be installed at the jobsite
prior to installation of any Trenwyth products. This
panel will represent the quality, color and texture of
the product and the workmanship to be expected
for the project. Either the owner or the project
architect must approve the panel. Failure to produce
a sample panel may result in loss of warranty.
Manufacturer will provide 4" units for a 4' x 4'
sample panel at no cost for the material (excluding
freight to the site).
Delivery, Storage and Handling
Glazed masonry units shall be delivered to the
jobsite on banded pallets with individual protective
covers on each glazed block face. Keep protective
block covers on the blocks until installation. Store
pallets in single stacks on level ground and cover
with waterproof covering (e.g., tarpaulins) to protect
the blocks from inclement weather. Handle blocks
carefully to avoid breakage and damage to
finished surface.
Project Site Conditions
Protection of Work: Cover walls, including open
tops, each day after installation to keep open walls
protected and dry. After units are installed they
should be protected from damage by other trades
performing operations that can stain or otherwise
damage the finished surfaces by covering walls with
plastic. Corners should be protected from damage
after installation by covering them with plywood.
Do not, under any circumstance, install a damaged
unit that does not conform to the requirements of
ASTM C90 and ASTM C744 for the block and
glazed face respectively. If units have been damaged
during transit, contact manufacturer immediately.
Laying Masonry Walls
Draw blocks from more than one pallet at a time
during installation. All exterior mortar shall include
an approved water repellent additive added to each
batch in the appropriate dosage rates for mortar
type (M, S or N) per the manufacturer’s instructions.
Refer to NCMA TEK Notes, available at
www.trenwyth.com, for Hot and Cold weather
construction practices.
Lay Astra-Glaze-SW+ blocks with the faces level,
plumb and true to a line strung horizontally at the
glazed face. Install only quality units; reject all
defective units, as defined in ASTM C744. Units
shall have uniform face joint dimensions of 1/4"
both horizontally and vertically and 3/8" on the
unglazed side.
Tool joints neatly after they are finger-hard to make
them straight and uniform. Size and place cut pieces
appropriately to maintain consistency and bond.
Complete masonry construction using procedures
and workmanship consistent with the best
masonry practices.
Lighting: Provide adequate lighting for masonry
work by placing all lighting at a reasonable
distance from the wall for even illumination.
Do not use trough lighting.
Base Course: Align base course properly on the
floor slab.
Cove Base: Keep the cove base tight to the slab if
vinyl floor tile is to be installed. For thicker flooring,
raise cove base units to the desired height.
Cutting: Make all unit cuts, including those for
bonding, holes, boxes, etc., with motor driven
masonry saws, using either an abrasive or diamond
blade. Cut neatly and locate for best appearance.
Mortar Bedding and Jointing:
1. Lay units with full mortar coverage on head and
bed joints taking care not to block cores to be
grouted or filled with masonry insulation.
2. Tool all mortar joints when thumbprint hard into a
concave configuration.
3. Care should be taken to remove mortar from the
face of masonry units before it sets.
4. Tuckpoint the joints of scored units for proper
appearance. All exterior scored units must be
tuckpointed to prevent water penetration.
Rake back the joint when epoxy (Bonsal/Laticrete)
is used on select jobs that require better
moisture prevention. NO RAKE JOINTS.
w w w. t r e n w y t h . c o m
A G 1 8

Installation
Astra-Glaze-SW+ ®
architectural masonry units
Recommended Mortars
In all exterior mortar, we recommend using
the matching manufacturer-approved waterrepellent
mortar additive (which may be
purchased from manufacturer). Follow
manufacturer’s instructions. Consult manufacturer
for recommendations. See “Mortars and Mortar
Joints”, Page AG 17.
Cleaning During Construction
Keep walls clean daily during installation using
brushes or rags and a clean damp cloth. Harsh
cleaning methods after walls have been erected
may mar the surface of the blocks. Do not allow
excess mortar lumps or smears to harden on the
glazed surfaces. Remove green mortar with a
dry cloth. Do not use steel wool, sandpaper or
other abrasives.
Flashing of Masonry Work
Install flashing at locations shown in the plans and in
strict accordance with the details and the best
masonry flashing practices.
Weep Holes and Vents
Install weep holes and vents at proper intervals
at courses above grade, above flashing and at
any water stops over windows, doors and beams.
Consult NCMA TEK Notes, available at
www.trenwyth.com, for additional information
on flashing.
Inspection
The glazed facing shall conform to the requirements
of ASTM C744 when viewed from a distance of
five (5) feet at right angles to the wall with normal
lighting. The concrete masonry units on which the
glaze is molded shall conform to the requirements
of ASTM C90.
Installation Recommendations
• For walls with a glazed finish on both sides, use
two single-faced units. Because masonry units are
typically installed aligning one side, the second
side of double faced units is almost invariably
misaligned. Use doube-faced units only when
economy is more important than appearance.
Manufacturer accepts no responsibility for
face alignment.
• Cavity wall construction is recommended for
exterior walls, with proper flashing, venting and
weep holes.
• For best appearance, use stack bond construction
when stack bond appearance is desired (as
opposed to scored units in running bond).
• All exterior mortar joints must contain an approved
water repellent additive. In all exterior mortar,
we recommend using the matching
manufacturer-approved water-repellent
mortar additive (which may be purchased from
manufacturer). Follow manufacturer’s instructions.
Consult manufacturer for recommendations.
• For best appearance and water resistance,
tuckpoint scored joints on interior and
exterior applications.
• A complementary or matching mortar color is
recommended when using colorful
Astra-Glaze-SW+ units.
Grouting Walls Solid
When filling walls with grout, proper detailing to
remove moisture is even more critical. Follow
masonry best practices and manufacturer’s
recommendations for the installation of weep holes,
vents and flashing.
Special Shapes and Colors
• Two different colors on one block. Any color
can be put on one side of the block. And the
same or any other color can be put on the other
side of the same block.
• No double bullnose units. Double bullnose units
are not available because they cannot be drawn
out of the molds. The molding methods will not
accommodate double bullnose units on full-sized
blocks. Some double bullnose Astra-Glaze-SW+
units are available in our 1" and 2" Shapes Series.
w w w. t r e n w y t h . c o m
A G 1 9

Installation
Astra-Glaze-SW+ ®
architectural masonry units
Joint Size
The proper joint size to use when laying Astra-
Glaze-SW+ block is 1/4" at the face and 3/8" at the
unglazed concrete blocking.
The glazed face dimensions are 7 3/4" x 15 3/4",
which allows a 1/4" joint using modular coursing.
Center
of
radius
1/4"
Joint Detail
3/8"
Installed With Other CMU Products Alignment
If the face of a masonry wall involves different
masonry products, it is necessary for the foreman to
know the exact dimensions of each of the products
to be installed in order to properly make bond when
preparing the layout.
If the joint requirement for one of the products is
1/4" and the other is 3/8", this point must be
taken into consideration when laying out the first
course. If it’s not taken into consideration, the
resulting finished wall will have unsightly misaligned
vertical joints.
Verastone Plus, Trendstone or Trendstone Plus units
properly over the 1/4" joints of Astra-Glaze-SW+.
Astra-Glaze-SW+ units must be laid using face
joints of 1/4" both vertically and horizontally. The
Verastone, Verastone Plus, Trendstone or
Trendstone Plus units being laid above must be
centered over the 1/4" joint of the Astra-Glaze-SW+
units which are already in place.
Depth Alignment
Astra-Glaze-SW+ units are 1/8" wider than standard
CMU’s. Astra-Glaze-SW+ double-faced units are
1/4" wider than standard CMU’s. This must be taken
into consideration in partition and double-faced walls
that combine glazed units with other products.
The small ledge created by Astra-Glaze-SW+ blocks
combined with other products is very attractive.
When the mason lays the walls so that the glazed
surface protrudes very slightly beyond the CMU
above, it enhances the overall appearance.
An alternative option is to use a 2" glazed unit and a
standard-weight block backup. This enables the
mason to maintain the same depth of material if
desired and guards against moisture retention in the
lightweight Astra-Glaze-SW+ block substrate.
PLEASE NOTE: A matching manufacturer-approved
water repellant mortar additive must be added to
the mortar and built into the adjoining blocks in all
exterior applications of Astra-Glaze-SW+ units.
Example:
Astra-Glaze-SW+ units are specified in the
wainscot of a corridor with Verastone, Verastone
Plus, Trendstone or Trendstone Plus blocks above
that point. Units have a single center score and
the wall is in running bond.
The difficulty in holding a correct running bond is
due to aligning the 3/8" joints of the Verastone,
w w w. t r e n w y t h . c o m
A G 2 0

Patching Units
Astra-Glaze-SW+ ®
architectural masonry units
Chipped Units
Damaged or chipped units that do not meet requirements of ASTM C90 and ASTM C744 for the block and
glazed face, repectively, should not be installed. If units incur damage during installation or by other trades,
a patch kit can be ordered from manufacturer. Follow manufacturer's instructions for best results.
Small scratches and scuffs can be repaired using a 50/50 mixture of boiled linseed oil and turpentine mixed
well together and applied with a clean rag. After a few minutes, the excess should be removed from the
glazed surface with a clean, dry rag or a paper towel. Be careful not to get this mixture into the joints
as it will darken the mortar.
w w w. t r e n w y t h . c o m
A G 2 1

Cleaning
Astra-Glaze-SW+ ®
architectural masonry units
Cleaning
Walls must be cleaned on a daily basis as
block laying proceeds. Keep walls clean by using
brushes or rags and a clean damp cloth. Harsh
cleaning methods after walls have been erected may
mar the surface of the blocks. Do not allow excess
mortar lumps or smears to harden on the glazed
surfaces. Remove green mortar with a dry cloth. Do
not use steel wool, sandpaper or other abrasives.
Masonry Cleaners
Use Custom Burnished Masonry Cleaner by
PROSOCO (dilute 1 part to 3 parts clean water),
carefully following manufacturer’s instructions.
Available from manufacturer. Do not powerwash.
CAUTION! The following solvents must never be
used as they may damage Astra-Glaze-SW+ block
facings: paint remover, lacquer thinner, epoxy
thinner, methylene chloride, acetone, muriatic acid.
General
• Wipe Astra-Glaze-SW+ faces clean with a
soft cloth as the blocks are laid each day.
• Wear rubber gloves when using
cleaning solutions.
• Test an unexposed portion of adjacent metal
fixtures with the cleaning solution. If corrosion or
staining occurs, protect the exposed portions.
• Protect adjacent masonry and floor area by
saturating with water and flushing away any
cleaning solution before it dries.
Materials
• Two plastic or hard rubber buckets
• Rubber gloves
• Soft fiber masonry brushes
(or whitewash brushes)
• Wooden, plastic or other soft, non-staining
scraping device
• Supply of “clean” wipers, such as lint-free cloths
or paper towels
• Clean water
Materials (Continued)
• Custom Burnished Masonry Cleaner by
PROSOCO. Dilute 1 part to 3 parts clean water.
DO NOT USE ACID.
Final Cleandown
Procedure 1
1. Brush clean water liberally on the surface area to
be cleaned. Brush approximately one square yard
at a time.
2. It is important that the glazed wall
surface be kept wet at all times.
Do not use dirty water.
3. Apply cleaning solution brushing in a circular
motion to remove any unwanted mortar smears.
4. Remove excess lumps of mortar with a wooden,
plastic or other soft, non-staining scraping device
and re-apply cleaning solution.
5. Allow cleaning solution to remain on the surface
for two or three minutes then wash off with liberal
amounts of fresh, clean water. Do not
powerwash. DO NOT USE ACIDS.
6. Wipe wall down completely dry with clean,
dry wipers.
Procedure 2
If liberal amounts of water cannot be used, an
alternative procedure may be employed.
1. Soak a clean wiper in the cleaning solution. Wring
it out so it is wet enough to dampen the surface,
but dry enough so that the solution will not run
down the wall.
2. Allow the solution to remain on the surface for
two or three minutes. Remove excess lumps of
mortar with the soft scraping device and repeat
Step #1.
3. Wipe the wall completely dry with clean,
dry wipers.
w w w. t r e n w y t h . c o m
A G 2 2

Cleaning
Astra-Glaze-SW+ ®
architectural masonry units
Maintenance
Astra-Glaze-SW+ units, properly installed and
cleaned, need virtually no maintenance other than
routine cleaning with standard commercial grade
cleaning agents such as PINESOL ® or FANTASTIK ® .
Other detergent-type cleaners, such as MR.
CLEAN ® , LESTOIL ® or equivalent, may be used
to remove stains such as grease, paint or pencil.
Use clean wipers.
Graffiti Removal
Graffiti, paint or dye may need special cleaning
methods and products such as Trenwyth Graffiti
Wizard ® environmentally friendly cleaner.
Graffiti Wizard ® environmentally friendly cleaner
removes most paints and permanent markers,
varnish, glue, crayon, oil, grease, food spills, etc.
from Astra-Glaze-SW+ glazed surface. Apply Graffiti
Wizard using a brush or cloth. Let stand 10 second
to 20 minutes, depending on the severity of the
stain. If using on a more porous or textured surface,
a non-metallic stiff bristle brush may be required.
Wipe the surface with a damp cloth. After the stain
is removed, neutralize the surface with water making
sure that all of the Graffiti Wizard is removed from
the surface. Trenwyth Graffiti Wizard is available in
4-oz., 12-oz., 1 gallon and 5 gallon containers.
To order, call (800) 233-1924. Always follow
manufacturer's safety precautions. (See Graffiti
Wizard ® literature, TR2810 behind the
General tab.)
For stubborn stains that are not fully removed with
Graffiti Wizard, additional cleaners may be required
— specifically Varsol, turpentine or xylene. Extreme
caution must be exercised when strong solvents
are used to remove paint or other stains from
Astra-Glaze-SW+ facings as too much exposure
time or rubbing pressure can dull the gloss of the
glazed face.
Permanent damage to the glazed facing can
result from the use of improper cleaners or solvents.
The following solvents must never be used on
Astra-Glaze-SW+ block facings: paint remover of
any kind, laquer thinner, epoxy thinner, methylene
chloride, acetone or muriatic acid.
Epoxy Grout Removal:
Never allow epoxy grout to fully cure on wall. Fully
cured epoxy grout cannot be totally removed from
Astra-Glaze-SW+ facings. The following products,
however, can remove most of it.
• Denatured alcohol – try this first since it will not
damage the glazed face.
• Xylene – CAUTION: Too much exposure time
or rubbing pressure can dull the gloss of the
glazed face.
w w w. t r e n w y t h . c o m
A G 2 3

architectural masonry units
Shapes & Sizes
Coding System
Astra-Glaze-SW+ ®
Shapes and Sizes Coding System
All units are nominal 8" and 16" lengths unless
modified by symbols as noted below. In some
instances, only the first two (2) symbols will be used.
Other symbols are added as required.
The coding system is based on a series of symbols
that define the size, general type, cap or jamb
variance from standard length and return.
1. The 1st part is the number denoting the
nominal thickness:
1", 2", 4", 6", 8", 10" and 12"
2. The 2nd part is the letter or combination of letters
denoting the general type of unit.
S = Stretcher
C = Cap or Sill
G = Cove Base
J = Jamb
T = Two-Faced
V = Vertically Coursed Unit
U = Bond Beam Unit (specify open
or solid botom)
X = Partially Unglazed Face
CC = Capped Both Sides
3. The 3rd part is a letter indicating whether the cap
or jamb unit is bull nose or square. In all cases,
this letter immediately follows the symbol
describing the type of return unit.
P = Square
O = Bullnose
4. The 4th part is a number denoting length of the
unit varying from the standard 16" length.
Example: 4CP8 is a 4" thick square corner
cap that is 8" long.
5. The 5th part is a letter denoting the hand of the
appropriate return unit.
R = Right Hand L = Left Hand
6. SPECIAL NOTE: For unit heights varying
from the nominal 8", the numeral denoting
height immediately follows the numeral
denoting thickness.
Example: 84GJO is a nominal
8" thick, 4" high, bullnose, corner,
base jamb unit.
7. DA# denotes the scoring pattern.
(See Page AG 28)
w w w. t r e n w y t h . c o m
A G 2 4

Shapes & Sizes
Astra-Glaze-SW+ ®
architectural masonry units
Stretcher
2S
15 5 /8"
7 3 /4"
4S 6S 8S
15 5 /8"
7 3 /4"
15 5 /8"
15 5 /8"
7 5 /8"
1 3 /4"
15 3 /4"
7 5 /8"
3 3 /4"
15 3 /4"
7 5 /8"
5 3 /4"
15 3 /4"
7 3 /4"
7 5 /8"
7 3 /4"
15 3 /4"
7 3 /4"
10S
15 5 /8"
12S
15 5 /8"
8U
15 5/
8"
8ST**
15 3 /4"
7 5 /8"
7 3 /4"
7 5 /8"
7 3 /4"
7 5/
8"
7 3 /4/ 4 "
7 3 /4"
7 3 /4"
9 3 /4"
15 3 /4"
11 3 /4"
15 3 /4"
7 3 /4/ 4 "
15 3 /4/ 4 "
7 7 /8"
15 3 /4"
Also available in 4, 6, 10 & 12" thickness.
Also available in 4, 6, 10 & 12" thickness.
8UT**
15 3 /4"
7 3 /4"
7 3 /4"
15 3 /4"
7 7 /8"
Also available in 4, 6, 10 & 12" thickness.
8KOBB
15 5 /8"
7 3 /4"
7 5 /8"
15 3 /4"
7 3 /4"
Also available in 6,10 & 12" thickness.
44S
3 5 / "
3 3/
4"
15 5 "
15 3 /4/ 4 "
3 /4/ 4 "
Also available in 2, 6, 8, 10 & 12" thickness.
8X
7 5/
8"
7 5 /8/ 8 "
15 11/16"
7 3 /4/ 4 "
Any partial
13"
face is available.
Also available in 2, 4, 6, 10 & 12" thickness.
8S8 8UCPX 15 5 /8/ "
8UCPXT**
15 5 /8"
416S
7 5 /8/ 8 "
7 3 /4/ 4 "
7 5/
8"
7 3/
4"
7 3 /4"
7 3 /4"
15 5/8"
15 3/4"
7 3 7 15 /4/ 4 "
3 /4/ 4 "
3 /4/ "
15 3 /4"
7 3/ "
7 7/8"
Any partial
3 3/4"
face is available.
3 3/4"
Also available in 2, 4, 6, 10 & 12" thickness. Also available in 2, 4, 6, 10 & 12" thickness. Also available in 6, 10 & 12" thickness.
3 3/4"
15 3/4"
412S12 8M-R* 8VU 8VUCCPT**
11 3 /4"
11 5 /8"
7 5 /8/ 8 "
15 5 /8/ 8 "
7 3 /4"
15 5/8"
153/4"
7 3 /4/ 4 "
15 3 /4"
15 3 /4"
3 3 /4"
11 3 /4"
7 3/
4"
15 3/
4"
Also available in 2, 4, 6, 10 & 12" thickness.
Open Ended Bond Beams (Available from the Phoenix, AZ facility only.)
OE1E
7 5 /8"
15 5 /8"
7 5 /8"
DCBB OE2E
7 5 /8"
15 5 /8"
7 5 /8"
Also available in 4, 6, 10 & 12" thickness.
DCBB OE1E
7 5 /8"
7 3 /4"
7 3 /4"
Also available in 6, 10 & 12" thickness.
15 5 /8"
7 5 /8"
7 7/8"
Note: Not all sizes are shown in this brochure.
Please consult your nearest
manufacturing facility.
* Specify left or right (L or R)
7 3 /4"
** See cautionary note regarding doublefaced
units in Installation Recommendations
on Specifications Page.
w w w. t r e n w y t h . c o m
A G 2 5

Shapes & Sizes
Astra-Glaze-SW+ ®
architectural masonry units
Cove Base
4G 8G 44G 4GDR*
7 5 /8/ 8 "
4 1 /4
15 "
15 3/
4"
7 7/
8"
7 5 /8/ 8 "
8 1 /4"
15 5/
8"
15 3 / 4 "
7 7/
8"
Also available in 2, 6, 8, 10 & 12" thickness. Also available in 2, 4, 6, 10 & 12" thickness. Also available in 2, 6, 8, 10 & 12" thickness. Also available in 2, 6, 8, 10 & 12" thickness.
4GJOR* 4GJPR* 44GJPR* 44GJOR*
4 1 / "
16 1 /4"
3 3/
4"
7 /8/ 8 "
16 1 /4"
3 3 /4/ "
7/
8"
3 5 / "
4 1 /4
15 5 "
15 3 / 4 "
7 /8/ 8 "
7 5 /8"
4 1 /4"
15 5 /8"
3 3 /4"
15 3 /4"
45º
2"
4 1 / "
4 1 / " *SPECIFY LEFT OR
4 1 /4/
RIGHT (L OR R)
Also available in 2" thickness. Also available in 2" thickness. Also available in 2" thickness. Also available in 2" thickness.
16 1 /4/ "
3 3 /4" 4
7/
8"
3 7/
8"
15 /4"
16 1 /4"
7 7 /8"
3 /4"
3 7/
8"
Jamb
8JO 15 5 / 8"
8JP 4JP L CORNER
15 5/
8"
3 3 /4" 4
8JPX
7 5 /8"
7 3 /4" 4
7 5 /8/ 8 "
7 3/
4"
7 3 /4" 4
7 3 /4" 4
416JP
15 3/
4"
7 3 /4" 4
15 3 / 4 "
1"R
Also available in 2, 4 & 6" thickness. Also available in 2, 4 & 6" thickness. Also available in JO Corner. Also available in 4, 6, 10 & 12"
thickness & JO Corner.
15 3/4"
7 3 /4" 4
412JP12 4JP135° 4JP12
113/4"
135º
3 /4" 4
33/4"
73/4"
"
15 3 /4" 4
Any partial
face is available.
73/4"
3 3/4"
4RAD27
15 3/4"
33/4"
113/4"
Also available in JO Corner. Also available in JO Corner.
Also available in 6 & 8" thickness. Also available in JO Corner.
113/4"
73/4"
33/4"
113/4"
33/4"
113/4"
33/4"
14 1/8"
27" Radius Block
* Specify left or right (L or R)
w w w. t r e n w y t h . c o m
A G 2 6

Shapes & Sizes
Astra-Glaze-SW+ ®
architectural masonry units
Metric shapes/sizes are available
See your Trenwyth representative for details on metric shapes and sizes
M20S M20G 6SM10JP135° M10CPSL
390
390
194
197
190
190
394
394
194
206
Also available in 5, 10, 15, 25, 35 cm thicknesses
94
135°
194
294
94
390
194
94
37
394
82
138
M520CCJO
198
25R
394
or
428
Caps *specify left or right (L or R)
4CPSR
1 1/2"
3 1/4"
5 1/2"
4CPSL
1 1/2"
3 1/4"
5 1/2"
4CP
3/
4"
4CO
7 3/
4"
3 3 / "
4CJOR*
15 3 /4/ 4 "
1"R
3 3 / "
4CJPR*
15 3 /4/ 4 "
3 3 /4/ 4 "
Also available in
2, 6 & 8" thickness.
416CJP
15 3 /4" 4
3 3 /4/ 4 "
Also available in
2, 6 & 8" thickness.
15 3/
4"
3 /4/ 4 "
3 /4/ 4 "
15 3/4"
15 3 /4/ 4 "
3 3 /4/ 4 "
Also available in 2" thickness.
15 3 /4/ 4 "
3 3 /4/ 4 "
Also available in 2" thickness.
3 3/4"
15 3/4"
1" and 2" shapes series
14CCO or 24CCO 16CCO or 26CCO 18CCO or 28CCO 14CCJO or 24CCJO 16CCJO or 26CCJO
1"R
3 7/8"
15 3/4"
18CCJO or 28CCJO
1"R
5 7/8"
14VGCCO or
24VGCCO
15 3/4"
3 7/8"
1"R
7 7/8"
16VGCCO or
26VGCCO
15 3/4"
5 7/8"
3 7/8"
1"R
18VGCCO or
28VGCCO
15 3/4"
or
17 1/8" 5 7/8"
7 7/8"
1"R
15 3/4"
or
17 1/8"
1"R
1"R
1"R
7 7/8"
1"R
15 3/4"
or
17 1/8"
1/2" toe
matches
standard “G”
base units
15 7/8"
15 7/8"
15 7/8"
w w w. t r e n w y t h . c o m
A G 2 7

Shapes & Sizes
Astra-Glaze-SW+ ®
architectural masonry units
• Score Dimensions. The width of the score on the
Astra-Glaze-SW+ face is 1/4" and it is cut after the
glazed face is molded.
• Score on the backside of block. The unglazed
back side of Astra-Glaze-SW+ blocks can be
scored. The score, however, is 3/8" wide which is
standard for raw blocks.
• Tuckpoint and scored joints. All scored joints
must be tuckpointed to prevent moisture
penetration and to match the real joints between
the blocks. This gives a more realistic, pleasing
appearance to the finished wall.
• Special scoring. Written dimensions and a
sketch are required in order to produce special
scoring. Limitations: No more than five (5) vertical
scores or two (2) horizontal scores are acceptable
on the face of a block. DO NOT USE RAKE
JOINTS unless tuckpointing with epoxy.
DA1
DA2
DA3
8x8 Score 4x8 Score Brick Score
DA4
DA5
DA7
2.6x16 Horizontal Score 8x5 Score 8x4 Score
DA8
DA9
DA10
2x16 Horizontal Score 6 Brick Vertical Score 4" from return
DA11
DA12
4x16 Horizontal Score 4x4 Score Design Your Own
w w w. t r e n w y t h . c o m
A G 2 8

architectural masonry units
Frequently Asked
Questions
Astra-Glaze-SW+ ®
FREQUENTLY ASKED QUESTIONS
1. How and where is this product made? Is it made like ceramic tile?
Astra-Glaze-SW+ units are manufactured in Emigsville, Pennsylvania, and Phoenix, Arizona. They are
produced using high purity, natural grain silica sands and a resinous binder cast onto a concrete block
in a thermoset, glazing process. The result is a hard glazed tile-like surface permanently molded onto
one or more faces of the concrete blocks. Astra-Glaze-SW+ blocks are fired at about 500 degrees
Fahrenheit in a tunnel oven. Conversely, ceramic tiles are fired at about 2,000 degrees Fahrenheit.
Because Astra-Glaze-SW+ facings are permanently molded to concrete blocks, they cannot come off
without destruction to the concrete block itself. Ceramic tile, on the other hand, is a thin fragile layer that
is glued on by tile setters after the wall has been erected and can be removed more easily.
2. Can Astra-Glaze-SW+ blocks be used on the exterior of buildings?
Will they deteriorate, fade, crack or spall?
Astra-Glaze-SW+ units have been used to construct interior and exterior walls of buildings in almost
every part of the continental United States for more than 32 years with excellent results.
Important Note: As with any building material, it is important that the building design and workmanship
be correct. For example, if the units are laid in the wall such that the concrete block substrate is
continually saturated with moisture (in the winter months in northern climates) due to inadequate
flashing or coping, poor mortar joints, leaking water pipes, etc., then the constant freezing and thawing
action can eventually cause crazing. Of course cracking, due to settling or wall movement can also
allow large amounts of moisture to enter and saturate the concrete blocks, causing the same problem.
Good masonry building practices and workmanship (including well tooled joints) should be specified and
enforced. Proper specification and installation of flashing, coping and weep holes are essential to
satisfactory performance and adequate control joints or other devices to accommodate wall movement
should be employed. The recommendations of NCMA TEK Notes should be followed. The glazed
facings of Astra-Glaze-SW+ and units are unaffected by acid rain or by temperatures up to 400° F.
3. How do Astra-Glaze-SW+ units perform in extreme cold, heat (i.e. kitchens near grills),
sunlight or acid rain, etc.?
Astra-Glaze-SW+ blocks perform excellently in a wide range of wall applications including kitchens,
laboratories, chemical plants, etc. and in the presence of acid rain.
4. Do the Astra-Glaze-SW+ facings meet Federal Agriculture (i.e. Department of Agriculture)
Standards for food processing, etc.?
Astra-Glaze-SW+ facings meet all federal, state and local standards for chemical resistance, stain
resistance, fire, flame, smoke, etc. The federal specification is ASTM C744. It meets the Department
of Agriculture standards for meat-packaging plants and other food-processing plants.
5. What does the "SW" stand for in Astra-Glaze-SW+?
SW stands for SEVERE WEATHER. Astra-Glaze-SW+ units are a product of state-of-the-art technology
and advances in polymer chemistry that have enabled Trenwyth to make its quality products even better.
To withstand all weather conditions from northern hard freeze to southern intense sunlight (UV), the
manufacturer’s block glazing chemistry has been designed to accommodate both extremes and
everything in between.
w w w. t r e n w y t h . c o m
A G 2 9

architectural masonry units
Frequently Asked
Questions
Astra-Glaze-SW+ ®
A degree of ductility has been built into the Astra-Glaze-SW+ facings and only fully cured, completely
dry lightweight blocks conforming to ASTM C90 are used for glazing, thereby giving the finished Astra-
Glaze-SW+ units exceptional resistance to cracking and crazing. Glazed units manufactured in Arizona
are medium weight units. Ultraviolet light inhibitors and stabilizers are built into the Astra-Glaze-SW+
chemistry, allowing the facings to maintain their color. All units contain a manufacturer-approved integral
water repellent CMU admixture at the time of manufacture. The backup block is integrally damp-proof
preventing water from being absorbed and held behind the glazed facing. If moisture does get into an
Astra-Glaze-SW+ wall, the water is not absorbed by the block but is shed, flowing down the wall to be
collected by the flashing and directed to the exterior through weeps or vents.
Colorfastness has been achieved through chemistry that blocks ultraviolet light from penetrating the
facing and stabilizes the polymers. This prevents degradation of the Astra-Glaze-SW+ facing.
6. What does the “+” stand for in Astra-Glaze-SW+?
Astra-Glaze-SW+ glazed masonry units have always been a low maintenance product. Reformulated to
be even more graffiti-proof, Astra-Glaze-SW were reintroduced as Astra-Glaze-SW+ units. New built-in
protectants in the PLUS units act as an invisible shield that withstands spray paint, permanent markers,
grease and crayon.
7. Are Astra-Glaze-SW+ blocks toxic?
No. Astra-Glaze-SW+ facings are classified as non-toxic. The only standard for toxicity is the New York
City Material and Equipment Acceptance Division (MEA) toxicity requirement. We have passed this
standard. Our approval number is MEA 31-82-M.
8. What are industry standards for glazed blocks, ASTM, etc.?
The ASTM standard for glazed concrete blocks is ASTM C744.
9. Are they “UL” rated?
Astra-Glaze-SW+ blocks are tested annually to Underwriters Laboratories (UL) equivalent standards by
various independent testing laboratories. Therefore, they are UL rated although they are not UL listed.
There is no requirement that glazed blocks be UL listed in the United States.
10. Can special colors be made?
We can match virtually any color.
11. How is your color consistency and will it match if we do a later addition?
We match our color standards to very close tolerances. Add orders or additions to older installations can
be matched if we are provided with a sample.
As with any manufactured item, a minor variation in shade is to be expected. With Astra-Glaze-SW+
units, we have reduced this to a minimum. The color of the Astra-Glaze-SW+ surface is required to
conform to an approved standard, tested and verified by a spectophotometer.
12. Can we get two different colors on one block?
Yes, we can put any color on one side and the same or any other color on the other side of the
same block.
w w w. t r e n w y t h . c o m
A G 3 0

architectural masonry units
Frequently Asked
Questions
Astra-Glaze-SW+ ®
13. Can special sizes and/or shapes be made?
We can make a variety of unique sizes and shapes. Additional shapes and sizes can be produced, for
an additional fee.
14. Can you provide double bullnose units?
We cannot provide double bullnose units because they cannot be drawn out of the molds: the molding
methods we use will not accommodate double bullnose units on full sized blocks. We do, however,
supply some double bullnose units in our 1" and 2" Shapes Series.
15. Why can’t two faces and one end be glazed?
We cannot glaze two faces and one end because it would be impossible to draw such a finished
product out of the mold. We can only make one face and an end or we can make one face, one end,
and one top, but we cannot make two faces and one end.
16. Can special scoring be done?
Special scoring can be done. We require a sketch or written dimensions in order to produce the special
scoring. There are certain limitations, however, and we generally don’t advise more than five vertical
scores and not more than two horizontal scores on any face of any block. We have difficulty scoring
around bullnose comers and caps. This is very expensive and time consuming but it can achieved.
Check with customer service or your sales representative to make sure that the special scoring patterns
you require are feasible.
17. What is the width of the score and is it cast or cut?
The width of the score on the Astra-Glaze-SW+ face is 1/4" and it is cut after the glazed face is molded.
18. Can I get the back side of the exposed block scored to match the scoring on
the glazed face side?
The back side of the blocks can be scored to match the face. This score, however, is 3/8" wide which
is standard for raw blocks.
19. Do I tuckpoint the scored joints?
All scored joints must be tuckpointed to prevent moisture penetration and to match the real joints
between the blocks. The result is a more realistic, appealing finished wall. DO NOT USE RAKE JOINTS
unless tuckpointing with epoxy.
20. Can I have an Astra-Glaze-SW+ face on one side and a Trendstone finish on the other side of
the same block?
No, an Astra-Glaze-SW+ and Trendstone finish cannot be on the same block because of differences in
block density. We will not cast Astra-Glaze-SW+ facings onto heavyweight or normalweight blocks.
Astra-Glaze-SW+ facings must be molded onto lightweight or mediumweitght blocks to get a strong
and integral bond. The surface of heavyweight blocks is generally less open, preventing a good
mechanical bond between the facing and the block. Therefore, heavyweight blocks do not stand up
very well to freezing and thawing in exterior applications. Lightweight blocks perform well in freeze/thaw
conditions because the aggregate used (expanded shale or expanded clay in our case) is cellular in
nature, providing a good measure of ductility.
w w w. t r e n w y t h . c o m
A G 3 1

architectural masonry units
Frequently Asked
Questions
Astra-Glaze-SW+ ®
21. How do Astra-Glaze-SW+ blocks compare to structural glazed facing tile (SGFT); are there any
advantages or disadvantages?
SGFT is available in Standard 8W Series which provides no fire rating or in 8WC PR Series which gives a
one (1) hour fire rating for a 4" wall. The fire rated units are priced so high as to be noncompetitive with
Astra-Glaze-SW+ units.
Standard 8W SGFT units are competitive with Astra-Glaze-SW+ units in the 2" and 4" thicknesses but
are much higher priced in 6" and 8" thicknesses (and in the fire rated units mentioned above) and are
not available at all in 10" or 12" thicknesses.
Having a vitrified, ceramic glazed surface, SGFT is slightly more chemical and stain resistant than Astra-
Glaze-SW+ units. However, like china, it is much more brittle and more easily damaged by impact. And
unlike the smooth, even finish of Astra-Glaze-SW+ units, SGFT surfaces tend to distort during
manufacturing, resulting in a wavy look when installed. Additionally, the color consistency has
traditionally been poor.
22. How do you patch Astra-Glaze-SW+ units?
Contact customer service for an Astra-Glaze-SW+ Patch Kit. Small scratches and scuffs can be
removed by using a 50/50 mixture of boiled linseed oil and turpentine mixed well together and wiped on
with a clean rag. After a few minutes the excess should be removed with a clean dry rag or a paper
towel. Be careful not to get this mixture into the joints as it will darken the mortar.
23. How do I cut Astra-Glaze-SW+ blocks in the field? Are there special tools required? Will the
surface splinter and chip when cutting?
Most of the shapes and sizes are produced as needed. Cutting should be done only when absolutely
necessary. It is best to cut Astra-Glaze-SW+ blocks with a motor driven power masonry saw
using a wet diamond blade. There are some dry diamond blades that perform acceptably without
cooling water. There are also abrasive blades that can be used in these power saws. The glazed surface
will not splinter and chip if care is exercised and the above recommendations are followed.
24. How well does the product withstand graffiti and how is it removed?
The Astra-Glaze-SW+ surface withstands graffiti very well. Graffiti can generally be carefully removed
using Trenwyth’s Graffiti Wizard ® environmentally friendly cleaner (see Page TR2810).
25. What do I use for the washdown?
See Astra-Glaze-SW+ Cleaning Instructions in (Pages AG 22–23).
26. What type of mortar can be used?
Astra-Glaze-SW+ blocks should be laid in a full bed of mortar which is consistent with the best concrete
masonry practices carefully following the recommendations of NCMA TEK Notes for best results.
All exterior mortar shall include a Trenwyth-approved integral water repellent additive added to each
batch in the appropriate dosage rates for mortar type (M, S or N) per manufacturer’s instructions.
27. Can I return blocks I don’t use?
No. All Astra-Glaze-SW+ blocks are custom made to order. We require a signed Sales Contract before
we will start manufacturing any order. Since we don’t make any blocks for stock, any Astra-Glaze-SW+
blocks that are ordered in excess must be taken and cannot be returned. It is strongly recommended
that great care be taken with “take-offs” to avoid this problem.
w w w. t r e n w y t h . c o m
A G 3 2

architectural masonry units
Frequently Asked
Questions
Astra-Glaze-SW+ ®
28. Can a face be supplied without a block attached to it?
No, we cannot supply a face without a block attached to it. The minimum thickness of block we can
make is a 2" unit and that can usually be used in any thin veneer situation.
29. Will the face pop off (typical of glazed brick)?
The Astra-Glaze-SW+ face will not pop off. The face is an integral part of the block once it has been
molded and cannot be removed without destruction of the basic block.
30. How do we deal with the “ledge” created by Astra-Glaze-SW+ blocks when painted Concrete
Masonry Units are laid above (i.e. walls with glazed wainscot)?
The 1/8" ledge created by Astra-Glaze-SW+ blocks in such an application is actually very attractive. If
the mason lays the walls so that the glazed surface protrudes 1/8" beyond the painted CMU above, it
can actually enhance the overall appearance. Conversely, the units can be laid flush to the face if the
ledge is not desired. (Then the 1/8" protrusion will be at the back of the wall.)
31. Can any mason install this product?
Masons who are used to laying architectural blocks can lay glazed blocks very well. Unfortunately, no
matter how well our blocks are manufactured, if they are not laid well, the appearance of the project is
diminished. Astra-Glaze-SW+ must be laid to the face.
32. Can water go through the Astra-Glaze-SW+ face?
No, the face of the Astra-Glaze-SW+ units is impervious to water. Tests have been conducted using a
high-pressure stream and no measurable penetration was recorded. All blocks used for glazing contain
Trenwyth-approved water repellent additive to provide additional protection should water penetrate the
wall through the mortar joints. Note: Any scores on the face of Astra-Glaze-SW+ blocks must be
tuckpointed or water will, of course, penetrate through the scores.
33. Why choose Astra-Glaze-SW+?
• Highest standard for quality
• The advantages of block construction
• Prompt delivery from large, efficient regional plants
• Finished load-bearing walls
• One trade installation cost savings
• Custom color matching capabilities
• Pre-consumer recycled content (upon request)
• Tremendous variation of color, pattern and design
• Tight impervious surface for sanitary environments
• Fire protection built into your design
• Personalized service
• Available in Acousta-Wal sound-absorbing units
Modern technology has created many new building materials with properties and performance
characteristics never before obtainable in so called “natural” materials — Trenwyth Astra-Glaze-SW+
units are an example of such progress.
Recent improvements in technology allow for the stain-resistant, chemical resistant, non-fading
and fire resistant structural glazed masonry units which are manufactured today under the trademark
Astra-Glaze-SW+ ® .
w w w. t r e n w y t h . c o m
A G 3 3

architectural masonry units
Frequently Asked
Questions
Astra-Glaze-SW+ ®
Channels of Distribution: Astra-Glaze-SW+ units are manufactured at two locations in the United States
and distributed through regional sales offices and a network of dealers throughout the United States,
Canada and the UK. Most of the Astra-Glaze-SW+ dealers are large block manufacturers or brick
distributors serving every part of the U.S.
High Quality Standards: There is one uniform, high standard for all Astra-Glaze-SW+ units — Grade A1.
There are no seconds, no unselected grades, no off-grade industrial classification. Just Grade A1!
Variety to Meet Your Design Needs: Consider the first advantages of the unit itself — the surface is a
smooth satin finish available in 96 Standard colors plus custom colors. The 8" x 16" face size means
approximately one unit per square foot. Face sizes are exact and permit precise coursing and uniform 1/4"
joint size. Face modulation is negligible. This gives a smooth, even appearance to the glazed wall surface.
Astra-Glaze-SW+ facings are available on virtually every size and shape of concrete block (for example,
cove base, jamb, bond beam, cap units, etc.). This allows a wide latitude and flexibility in design and
methods of construction.
In addition to the usual glazed shapes and trim units, Astra-Glaze-SW+ brings to the designer the Scored
Series and the Design Series which offer a wide selection of scale and pattern. The Scored Series provides
the choice of reduced scale and pattern with the economy of large 8 x 16 block, e.g. 8 x 8 Score (DA 1)
5 x 8 Score. (DA5) Brick Score (DA3), etc.
The Design Series includes various curved and flared projections on the faces to give form to the wall.
Cost Savings: The economies inherent in Astra-Glaze-SW+ construction become very clear when you
analyze the erection of a loadbearing wall.
In the case of ceramic tile, the mason lays up the block wall and another tradesman, the tile setter, lays up
the ceramic tile in a separate operation and, in a further operation, grouts the joints. In the case of epoxy
coating, the mason lays up the block wall then another tradesman, the painter this time, applies a filler coat
plus two finish coats.
Astra-Glaze-SW+ units, however, are laid up by the mason in one operation providing both the structural
wall and the finished surface. Furthermore, Astra-Glaze-SW+ facings are permanent. They will last the life of
the building, will not fall off or ever require resurfacing. No matter what thickness of loadbearing wall, the
masonry contractor can lay one through-wall unit with Astra-Glaze-SW+ units.
Ease of Construction: In modern construction, today’s designer is faced with a host of problems involving
electrical conduits, gas pipes, water pipes, waste stacks and other utilities running through the building. In
schools, hospitals, laboratories and industrial plants, a designer may have to deal with compressed air lines,
oxygen systems, etc. as well.
Plumbing, wiring, gas pipes and waste stacks are easily accommodated in Astra-Glaze-SW+ walls. The
Astra-Glaze-SW+ finish is easily drilled or sawed to receive the electrical plumbing or other outlets.
Fire Safety: Truly adequate fire protection with a factor of safety is of vital concern to every designer of
schools, hospitals, dormitories and multi-story buildings. Astra-Glaze-SW+ units give you that required fire
rating up to 4 hours, which is the rating of the block itself.
The glazed facing itself is classified as non-burning. The ASTM and Federal government Specifications allow
a flame spread of up to 25 and a smoke contribution of 50. Astra-Glaze-SW+ tests at 5 flame spread and
25 smoke contribution. This means that our glazed unit greatly exceeds the requirements for fire safety.
w w w. t r e n w y t h . c o m
A G 3 4

architectural masonry units
Frequently Asked
Questions
Astra-Glaze-SW+ ®
In Summary: Astra-Glaze-SW+ offers you prompt delivery from large efficient regional plants and
personalized service. You get the cost savings of a single unit being both structural and finished. The glazed
finish meets the highest standard for quality — and exceeds all industry standards. Astra-Glaze-SW+ units
bring all the advantages of block construction with tremendous variation of color, pattern and design. With
Astra-Glaze-SW+ units, the entire back-up wall can be eliminated. Important, too, is the fact that you
provide recognized fire protection in your design.
If you have any questions, please contact your sales representative or customer service at 800-233-1924
to find the representative in your area.
w w w. t r e n w y t h . c o m
A G 3 5

Colors
Astra-Glaze-SW+ ®
architectural masonry units
Ask about our custom color matching capabilities.
Note: Please specify from actual sample.
*LRV – Light Reflectance Value
Cool Cream 51.8% Terra Cotta 13.5% Soft Rose 16.5% Silver Gray 46.3% Valley Forge Blue 9.4% Sunbath 56.5%
Vanilla 53.6% Vivid Red 7.8% Chelsea Pink 25.5% Pewter 21.1% Cosmic Blue 8.8% Avocado 21.4%
Buttermilk 51.8%* Garnet 8.4% Ruby Red 9.5% Earl Grey 9.5% Ultra Blue 5.4% Mountain Meadow 26.7%
Wheatfield 41.8% Russett 12.6% Orchid Petal 36.8% Charcoal 6.3% Frosted Jade 19.8% Willow Leaf Green 10.4%
Lemon Peel 47.6% Chili Pepper 10.5% Lavender 26.2% Ebony 3.8% Island Green 36.2% Ivory 50.7%
Golden Honey 51.1% Peach Fuzz 40.6% Royal Purple 17.3% Pastel Blue 42.8% Misty Green 45.7%
Antique Lace 38.5%
Sunflower 35.4% Orange Cream 42.1% Snow White 66.4% Baby Blue 36.3%* Silk Green 46.7% Safari Beige 34.8%
Deep Marigold 31.5% Burwick Blush 48.6% Whitman White 61.5% Rothwell Blue 22.8% Caribbean Reef 21.3% Sand 34.8%
Coral Flower 44.7% Cherokee Tan 29.6% Egg Shell 54.0% Fountain Blue 20.7% Riviera 17.9% Coastline 26.3%
Desert Rose 40.8% Warm Spice 16.1% Oatmeal 51.4% Azure Breeze 18.2% Teal 7.7% Pebble 27.3%
Light Sienna 23.7% Canella 18.3% Green Speckle 50.7% Diamond Blue 11.0% Sea Green 19.4% Clay 28.5%
Sedona Clay 29.8% Mahogany 12.3% Custom Red 52.3% Rich Blue 12.6% Mallard Green 15.4% British Fog 21.0%
Paprika 29.4% Autumn Brown 11.6% Custom Blue 52.3% Cobalt Blue 18.1% Rain Forest 16.2% Dark Granite 18.1%
Viking Red 17.0% Copperstone 8.9% Custom Speckle 50.7% Bimini Blue 23.2% Shamrock Green 14.2% Peanut Brittle 23.0%
Fire Engine Red 9.5% Coffee Bean 4.6% Cappuccino 32.3% Sapphire 11.4% Holly Green 11.1% Wild Mushroom 11.2%
Banner Red 14.5% Pink Ice 52.4% Custom Gray 51.2% Ocean Blue 21.5% Moss Green 5.1% Flint 8.2%
w w w. t r e n w y t h . c o m
A G 3 6

This page intentionally left blank

Verastone ®
recycled ground face masonry units
Verastone ® Plus
recycled filled and polished masonry units
uncompromising design
and application flexibility.

04
Both Verastone and Verastone Plus are specially manufactured to provide exceptional
performance and design flexibility for Green Building projects. Verastone recycled ground
face masonry units are integrally-colored block with one or more faces ground to expose
the variegated color of the natural aggregates.
Verastone Plus recycled filled and polished masonry units offer a smooth terrazzo look. After
the initial grinding process, as a cementitious grout is added to the pores and interstices of
the unit. The filled units are then polished smooth in a multi-stage polishing process to
produce an impervious, graffiti resistant surface.
Verastone ® and Verastone ® Plus advantages at a glance
Recycled Content Extracted, processed and manufactured regionally, Verastone and Verastone Plus masonry
units contain a significant amount of pre-consumer recycled content that may contribute
LEED Green Building Rating Points ® to your building.
One-step Installation Single trade installation of finished load-bearing or non-load-bearing walls saves time
and money.
Preserved Beauty The factory-applied clear satin gloss or water-based sealer further accentuates the
natural beauty of the aggregates while providing additional protection from moisture
and the elements.
Verastone Plus Advantages Verastone Plus offers smooth finished surfaces as the pores and interstices of the ground
surfaces are filled with a cementitious grout and polished smooth in a multi-stage process.
Offering the look of a terrazzo finish, the polished surface of Verastone Plus is the ultimate in
cleaning and stain protection. The filled and polished surfaces resist stains and chemicals;
paint, marker and graffiti clean off easily.
Durability Verastone and Verastone Plus feature built-in ductility and durability.
Moisture / Mold Resistant All Verastone and Verastone Plus units are manufactured with an integral water repellent
admixture to repel moisture and prevent mold and efflorescence.
Low Maintenance The units are virtually maintenance free and will last the lifetime of your building with
no refinishing.
Colors, Shapes & A sophisticated color palette and a wide variety of shapes and scoring patterns are
Scoring Patterns available for maximum design flexibility.
Fire Protection Verastone and Verastone Plus features up to a 4-hour fire rating, depending on the
thickness and internal configuration of the block.
Regional Color Options The aggregates are native to your region allowing your building to blend naturally
with your environment.
Sound-Absorbing Option Verastone recycled ground face masonry units are available in Acousta-Wal ®
sound-absorbing units.
Over-sized Units Verastone and Verastone Plus are available in Monumental over-sized units..
Verastone ®
recycled ground face masonry units
Verastone ® Plus
recycled filled and polished masonry units

architectural masonry units
Table of Contents
Verastone ®
Verastone ® Plus
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VS 1
R-Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VS 2 – 5
ASTM Reports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VS 6
Block Characteristics/Fire Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VS 7
Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VS 8 – 9
Cleaning Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VS 10 – 12
Field Coat Application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VS 13 – 14
Shapes & Sizes Coding System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VS 15
Shapes & Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VS 16
Scoring Patterns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VS 17
Chamfered Edge Coding System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VS 18
Chamfered Edge Design Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VS 19
Bullnose Edge Coding System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VS 20
Frequently Asked Questions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VS 21 – 24
Verastone ® and Verastone ® Plus Colors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VS 25
w w w. t r e n w y t h . c o m
V S T O C

This page intentionally left blank

Verastone and Verastone Plus,
Specifications
PART 1 – GENERAL
SUBMITTAL
Submit color samples for selection from manufacturer’s
group A, B, C, D or E. Submit product literature,
certifications, test reports and full size sample(s) of
each color specified.
QUALITY ASSURANCE
Certifications: Concrete blocks for grinding shall conform to
ASTM C90. After the initial grinding process to expose the
variegated colors of the natural aggregates, the pores and
interstices of Verastone Plus filled and polished units are
filled with a cementitious grout and polished smooth in a
multi-stage polishing process. Both the ground face and
filled and polished surfaces shall have a factory-applied
heat-treated acrylic or water-based sealer finish.
All units contain a manufacturer-approved integral waterrepellent
CMU admixture at the time of manufacture.
Verastone Plus filled and polished units shall conform to the
requirements of ASTM C744-08 and all applicable Federal
Specifications.
Both Verastone and Verastone Plus contain pre-consumer
recycled content. Contact your Trenwyth representative for
details.
Fire Resistance: Fire rated for up to 4 hours. Define hourly
ratings required by NCMA TEK Notes, available at
www.trenwyth.com.
Field Constructed Mock-ups: Construct a sample panel, no
less than 4' x 4', of units of each color and size to be used
in the project.
A full size unit is required to illustrate color and texture for
approval. Manufacturer requires a sample panel be installed
at the jobsite prior to installation of any Trenwyth product.
This panel will represent both the quality of the product and
the workmanship to be expected for the project. The panel
must be approved by either the owner or architect for the
project. Manufacturer will provide 4" units for a 4' by 4'
sample panel at no cost for the material (excluding freight
to site).
DELIVERY, STORAGE AND HANDLING
Units shall be delivered to the jobsite on covered banded
pallets with cardboard between layers. Store pallets in
single stacks on level ground and cover with waterproof
covering (e.g., tarpaulins) to protect the blocks from
inclement weather. Handle blocks carefully to avoid
breakage and damage to the finished surfaces.
PROJECT/SITE CONDITIONS
Protection of Work: Cover walls each day after installation
to keep open walls protected and dry. After units are
installed they should be protected from damage by other
trades performing operations that can stain or otherwise
damage the finished surfaces by covering walls with plastic.
Corners should be protected from damage after installation
by covering them with plywood.
PART 2 – PRODUCTS
PRODUCT NAME
Verastone ® recycled ground face masonry units
Verastone ® Plus recycled filled and polished masonry units
MANUFACTURER
Anchor Concrete Products (800) 233-1924
One Connelly Road • Emigsville, PA 17318
Northfield Block Company (800) 358-3003
3400 E. Bungalow Road, Morris, IL 60450
RELATED MATERIALS
Colored matching or contrasting mortar is available from
manufacturer. Consult NCMA TEK Notes, available at
www.trenwyth.com, for mortar type and specifications. For
all exterior mortar, use matching manufacturer-approved
water repellent mortar admixture following manufacturer's
instructions. Consult manufacturer for recommendations.
SIZES AND SHAPES
Surfaces are manufactured to provide finished dimensions
of 7-5/8" x 15-5/8" ± 1/8". Bed depth dimensions for single
face units are 3-9/16", 5-9/16", 7-9/16", 11-9/16" ± 1/8".
Two face units are 3-1/2", 5-1/2", 7-1/2", 11-1/2", ± 1/8".
Nominal 2", 4", 6", 8", 10" and 12" standard block
thickness are available as well as all standard block shapes.
High-strength units for special structural requirements, oversized
units, and metric shapes and sizes are also available.
MASONRY CLEANERS
Carefully following manufacturer’s instructions, use
Burnished Custom Masonry Cleaner by PROSOCO (dilute
1 part to 3 parts clean water). Available from manufacturer.
Do not powerwash.
CAUTION! Never use Muriatic Acid solution or any cleaner
with an acid base on units.
PART 3 – EXECUTION
LAYING MASONRY WALLS
Draw blocks from more than one pallet at a time during
installation. All exterior mortar shall include manufacturerapproved
matching water-repellent additive added to each
batch in the appropriate dosage rates for mortar type (M, S
or N) per manufacturer's instructions. Refer to NCMA TEK
Notes, available at www.trenwyth.com, for Hot and Cold
weather construction practices.
Lay units using the best concrete masonry practices. Install
only quality units; reject all defective units as defined by
ASTM C90. Lay blocks with the faces level, plumb and true
to the line strung horizontally at the ground or filled and
polished face. Units shall have uniform, 3/8"-wide joints
both horizontally and vertically on the finished side of the
wall. Tool joints neatly after they are finger-hard to make
them straight and uniform. Size and place cut pieces
appropriately to maintain consistency and bond. Complete
masonry construction using procedures and workmanship
consistent with the best masonry practices.
INSTALLATION
Lighting: Provide adequate lighting for masonry work by
placing all lighting at a reasonable distance from the wall for
even illumination. Do not use trough lighting.
Cutting: Make all unit cuts, including those for bonding,
holes, boxes, etc., with motor-driven masonry saws, using
either an abrasive or diamond blade. Cut neatly and locate
for best appearance.
MORTAR BEDDING AND JOINTING
1. Lay units with full mortar coverage on head and bed
joints taking care not to block cores to be grouted or
filled with masonry insulation.
2. Tool all mortar joints when thumbprint hard into a
concave configuration.
3. Care should be taken to remove mortar from the face of
masonry units before it sets.
4. Tuckpoint the joints of scored units for proper
appearance. All exterior scored units must be
tuckpointed to prevent water penetration. NO
RAKE JOINTS.
FLASHING OF MASONRY WORK
Install flashing at locations shown in the plans and in
strict accordance with the details and the best masonry
flashing practices.
WEEP HOLES AND VENTS
Install weep holes and vents at proper intervals at courses
above grade and at any water stops over windows, doors
and beams. Consult NCMA TEK Notes, available at
www.trenwyth.com, for proper flashing and drawings.
INSPECTION
The faces shall conform to the requirements of ASTM C90
when viewed from a distance of twenty (20) feet at right
angles to the wall with normal lighting.
CLEANING
Keep walls clean daily during installation using brushes,
rags and the burlap squares supplied on the pallets. Do
not allow excess mortar lumps or smears to harden on
the finished surfaces. Harsh cleaning methods after walls
have been erected will mar the surface of the blocks.
FINAL CLEANDOWN
Clean the completed walls with PROSOCO Burnished
Custom Masonry Cleaner (dilute 1 part to 3 parts clean
water), strictly following the manufacturer's instructions –
including thorough rinsing. Do not use acid or abrasives
on the finished surfaces. Failure to strictly follow
manufacturer’s instructions can result in permanent
damage to the finished faces. Do not apply Burnished
Custom Masonry Cleaner with pressure spray above
50 psi. Do not powerwash.
FIELD COAT APPLICATION
For completely finished walls, a finish coat of
TRENDCOAT ® Acrylic (minimum 20% solids content) or
TRENDCOAT ® WB (water-base) is recommended. Apply
to walls after cleandown and when the walls are dry. Apply
the acrylic evenly to cover the entire surface without
forming drips or runs. For maximum coverage and best
appearance, apply TRENDCOAT Acrylic or TRENDCOAT
WB with airless spray equipment. Consult manufacturer
for further information. This clear, high-solids acrylic,
provides moisture resistance and helps to cover any
scuffs or scratches that may occur during handling and/or
installation. TRENDCOAT also offers excellent graffiti
resistance for Verastone Plus filled and polished units.
MAINTENANCE
Properly installed and cleaned, units need virtually no
maintenance other than routine cleaning (i.e. Pinesol or
Fantastik). Graffiti, paint or dye stains may need special
cleaning methods and products such as Trenwyth
Graffiti Wizard ® environmentally friendly cleaner. Contact
manufacturer for specific cleaning recommendations.
INSTALLATION RECOMMENDATIONS
Consult NCMA TEK Notes, available at www.trenwyth.com,
for proper installation of concrete masonry units.
w w w. t r e n w y t h . c o m
VS 1

This page intentionally left blank

architectural masonry units
R-Values
Verastone ®
Verastone ® Plus
R-values of concrete masonry walls are correlated to concrete density, since thermal conductivity of
concrete increases with increasing density. The following tables list a range of R-values for each density.
Contact your sales representative.
Table 2 — R-Values For 6 in. (152 mm) Concrete Masonry Walls, hr . ft 2.o F/Btu a
Cores filled with:
Density of
concrete
Cores empty
Perlite
Loose-fill insulation
Vermiculite
Polyurethane
foamed insulation
Solid grouted
Construction
Exposed
block, both
sides
pcf range mid range mid range mid range mid range mid
85 2.2-2.5 2.4 4.8-6.1 5.3 4.5-5.6 5.0 5.2-7.0 5.9 1.6-1.8 1.7
95 2.1-2.4 2.2 4.1-5.4 4.6 3.9-5.0 4.3 4.4-6.1 5.0 1.5-1.7 1.6
105 2.0-2.2 2.1 3.5-4.8 4.0 3.3-4.5 3.8 3.7-5.2 4.3 1.4-1.6 1.5
115 1.8-2.1 2.0 3.0-4.2 3.4 2.9-4.0 3.3 3.1-4.5 3.6 1.4-1.5 1.4
125 1.7-2.0 1.8 2.5-3.7 3.0 2.5-3.5 2.9 2.6-3.9 3.1 1.3-1.5 1.4
135 1.6-1.9 1.7 2.2-3.2 2.6 2.2-3.1 2.5 2.2-3.4 2.7 1.3-1.4 1.3
Table 3 — R-Values For 8 in. (203 mm) Concrete Masonry Walls, hr . ft 2.o F/Btu a
Cores filled with:
Density of
concrete
Cores empty
Perlite
Loose-fill insulation
Vermiculite
Polyurethane
foamed insulation
Solid grouted
Construction
Exposed
block, both
sides
pcf range mid range mid range mid range mid range mid
85 2.4-2.7 2.5 6.3-8.2 7.1 5.9-7.5 6.6 6.9-9.4 8.0 1.9-2.1 2.0
95 2.3-2.6 2.4 5.3-7.2 6.1 5.0-6.7 5.7 5.8-8.1 6.7 1.7-2.0 1.8
105 2.1-2.4 2.2 4.5-6.3 5.2 4.3-5.9 4.9 4.8-7.0 5.6 1.6-1.9 1.7
115 2.0-2.3 2.1 3.8-5.5 4.4 3.7-5.2 4.3 4.0-6.0 4.7 1.5-1.8 1.6
125 1.9-2.2 2.0 3.2-4.8 3.8 3.1-4.6 3.7 3.3-5.1 4.0 1.5-1.7 1.5
135 1.7-2.1 1.9 2.7-4.2 3.3 2.7-4.0 3.2 2.8-4.4 3.4 1.4-1.6 1.5
w w w. t r e n w y t h . c o m
V S 2

architectural masonry units
R-Values
Verastone ®
Verastone ® Plus
Table 4 — R-Values For 10 in. (254 mm) Concrete Masonry Walls, hr . ft 2.o F/Btu a
Cores filled with:
Density of
concrete
Cores empty
Perlite
Loose-fill insulation
Vermiculite
Polyurethane
foamed insulation
Solid grouted
Construction
Exposed
block, both
sides
pcf range mid range mid range mid range mid range mid
85 2.5-2.9 2.7 7.5-9.9 8.5 7.0-9.1 7.9 8.2-11.3 9.5 2.1-2.4 2.2
95 2.4-2.7 2.5 6.3-8.7 7.2 6.0-8.0 6.8 6.7-9.7 7.9 1.9-2.2 2.0
105 2.2-2.5 2.3 5.2-7.5 6.1 5.0-7.0 5.8 5.5-8.2 6.6 1.8-2.1 1.9
115 2.1-2.4 2.2 4.4-6.5 5.2 4.2-6.2 5.0 4.6-7.0 5.5 1.7-2.0 1.8
125 1.9-2.3 2.1 3.7-5.6 4.4 3.6-5.4 4.3 3.8-6.0 4.6 1.6-1.9 1.7
135 1.8-2.1 2.0 3.1-4.9 3.7 3.0-4.7 3.6 3.2-5.1 3.9 1.5-1.8 1.6
Table 5 — R-Values For 12 in. (305 mm) Concrete Masonry Walls, hr . ft 2.o F/Btu a
Cores filled with:
Density of
concrete
Cores empty
Perlite
Loose-fill insulation
Vermiculite
Polyurethane
foamed insulation
Solid grouted
Construction
Exposed
block, both
sides
pcf range mid range mid range mid range mid range mid
85 2.6-3.0 2.8 9.1-12.1 10.3 8.5-11.0 9.6 10.0-13.8 11.5 2.3-2.6 2.4
95 2.4-2.8 2.6 7.6-10.5 8.8 7.2-9.7 8.2 8.2-11.8 9.6 2.1-2.4 2.3
105 2.3-2.6 2.4 6.3-9.1 7.4 6.0-8.5 7.0 6.7-10.0 8.0 2.0-2.3 2.1
115 2.1-2.5 2.3 5.2-7.9 6.2 5.1-7.4 6.0 5.5-8.5 6.6 1.9-2.2 2.0
125 2.0-2.3 2.2 4.4-6.8 5.3 4.2-6.5 5.1 4.5-7.2 5.5 1.8-2.0 1.9
135 1.9-2.2 2.0 3.6-5.8 4.4 3.6-5.6 4.3 3.7-6.1 4.6 1.7-1.9 1.8
Information based on data published by the National Concrete Masonry Association. See NCMA TEK Note
6-2A, available at www.trenwyth.com.
w w w. t r e n w y t h . c o m
V S 3

architectural masonry units
R-Values
Verastone ®
Verastone ® Plus
Additional r-values can be achieved with factoryinstalled
expanded polystyrene, such as Korfil or
ICON inserts.
Korfil ® Block Insulation inserts are individually
molded expanded polystyrene inserts. Installed at
your Trenwyth manufacturing facility, Korfil insulation
inserts are designed to fit standard two-core
masonry units. Korfil inserts are available in 6", 8",
10" and 12" widths.
R-Values
Both Korfil and ICON inserts offer your building the
following benefits:
• One-step installation of insulated masonry block
saves time and money.
• R-value unaffected by moisture or aging
• Insulated block offers up to a 4-hour fire rating
• Improves dew point and sound transmission
resistance
• Offers space for easy installation of utilities
within wall
• Flame retardant polystyrene
• Use with single-wythe and cavity
wall construction
• No maintenance required
• Available in 6", 8", 10" and 12" widths.
Caution: Expanded Korfil polystyrene should not be
exposed to temperatures exceeding 184ºF.
Applicable Standards:
• ASTM C578 Specification for Rigid Cellular
Polystyrene Thermal Insulation
• ASTM C90 Standard Specification for
Loadbearing Concrete Masonry Units
ICON ® Universal Concrete Block Insulation
Inserts are molded from expandable polystyrene.
Pre-fit at your Trenwyth manufacturing facility, ICON
inserts are designed to compress and fit the core of
all masonry units and significantly improve cmu
thermal efficiency.
w w w. t r e n w y t h . c o m
V S 4

architectural masonry units
R-Values
Verastone ®
Verastone ® Plus
6" Two-Core Masonry Unit
Density of
Cores Empty Cores Insulated
Block - lbs/ft 9 R t U R t U
80 2.64 .38 6.45 .16
95 2.42 .41 5.39 .19
105 2.29 .44 4.76 .21
115 2.17 .46 4.21 .24
125 2.05 .49 3.69 .27
135 1.95 .51 3.25 .31
12" Two-Core Masonry Unit
Density of
Cores Empty Cores Insulated
Block - lbs/ft 9 R t U R t U
80 3.12 .32 9.38 .11
95 2.83 .35 8.09 .12
105 2.66 .38 7.27 .14
115 2.52 .40 6.51 .15
125 2.38 .42 5.78 .17
135 2.26 .44 5.11 .20
8" Two-Core Masonry Unit
Density of
Cores Empty Cores Insulated
Block - lbs/ft 9 R t U R t U
80 2.86 .35 7.74 .13
95 2.61 .38 6.55 .15
105 2.46 .41 5.83 .17
115 2.33 .43 5.17 .19
125 2.21 .45 4.56 .22
135 2.10 .48 4.01 .25
12" Cavity Wall, 4" Outer Wythe,
3/4 Air Space, 8" Two-Core Block
Density of
Cores Empty Cores Insulated
Block - lbs/ft 9 R t U R t U
80 4.26 .23 9.14 .11
95 4.01 .25 7.95 .13
105 3.86 .26 7.23 .14
115 3.73 .27 6.57 .15
125 3.61 .28 5.96 .17
135 3.50 .29 5.41 .28
10" Two-Core Masonry Unit
Density of
Cores Empty Cores Insulated
Block - lbs/ft 9 R t U R t U
80 3.00 .33 8.52 .12
95 2.73 .37 7.25 .14
The r-values and u-values are based on
information provided by insert manufacturer,
CBIS. Values are based on ASHRAE and
NCMA publications.
For more information, contact your Trenwyth
representative or visit www.cbisinc.com.
105 2.57 .39 6.48 .15
115 2.43 .41 5.76 .17
125 2.31 .43 5.09 .20
135 2.19 .46 4.48 .22
w w w. t r e n w y t h . c o m
V S 5

architectural masonry units
ASTM Reports
Verastone ®
Verastone ® Plus
ASTM C90 specifies the following tests for load-bearing concrete masonry units
for VERASTONE and VERASTONE PLUS recycled ground face masonry units
Compressive Strength and
Moisture Absorbancy
A test to ensure that blocks meet
strength and moisture requirements, and
are free of cracks and other defects.
Complies
ASTM C744 specifies the following tests for VERASTONE PLUS
recycled filled and polished ground face masonry units
Cracking and Crazing
A test to ensure that the units are free
from cracking and/or crazing.
Complies
Adhesion
A test to determine the adhesion of the
finished facing to the block substrate.
Complies
Abrasion
A test to measure the abrasion
resistance of the finished facing.
Complies
Color Change
A test by accelerated weathering
apparatus to measure change.
Complies
w w w. t r e n w y t h . c o m
V S 6

architectural masonry units
Block Characteristics
Fire Rating
Verastone ®
Verastone ® Plus
Fire resistance ratings can be calculated using a method that multiplies the percent of solid material in the
concrete masonry unit by the actual thickness (in inches) of the blocks to determine the hourly rating for the
type of aggregate used. Contact your Trenwyth representative for specific fire ratings.
FIRE RESISTANCE RATINGS/MINIMUM REQUIRED EQUIVALENT INCHES
Aggregate Type in
The Concrete Masonry Unit
Fire Resistance
0.5 Hr. 0.75 Hr. 1 Hr. 1.5 Hr. 2 Hr. 3 Hr. 4 Hr.
Calcareous or siliceous gravel 2.0 in. 2.4 in. 2.8 in. 3.6 in. 4.2 in. 5.3 in. 6.2 in.
Limestone, cinders or slag 1.9 in. 2.3 in. 2.7 in. 3.4 in. 4.0 in. 5.0 in. 5.9 in.
Expanded clay, shale or slate 1.8 in. 2.2 in. 2.6 in. 3.3 in. 3.6 in. 4.4 in. 5.1 in.
Expanded slag or pumice 1.5 in. 1.9 in. 2.1 in. 2.7 in. 3.2 in. 4.0 in. 4.7 in.
Calculating "Equivalent Thickness" is simply determining what the block thickness would be if the same
amount of material contained in a hollow unit were re-molded without core holes.
Nominal Width
(Inches)
EQUIVALENT THICKNESS OF CONCRETE MASONRY UNITS (IN INCHES)
Based on Typical
Hollow Units (1)
Equivalent Thickness
Based on Percent Solid
(75% - semi-solid) (100% - solid)
4 2.68 (73.8%) 2.72 3.625
6 3.09 (55.0%) 4.22 5.625
8 4.04 (53.0%) 5.72 7.625
10 4.98 (51.7%) 7.22 9.625
12 5.77 (49.6%) 8.72 11.625
CALCULATING ESTIMATED FIRE RESISTANCE EXAMPLE
An 8" hollow masonry wall is constructed of expanded slag units reported to be 53%* solid. What is the
estimated fire resistance of the wall (modular units)?
Equivalent Thickness = % solid x depth
Example: .53 x 7.625 in. = 4.04 inches
From Table: 3 hr. Fire Resistance requires 4.0 inches
*Percentage solid can be calculated from net area or net volume as determined by ASTM C140
“Methods of Testing Concrete Masonry Units”.
(1) Information based on data published by the National Concrete Masonry Association in NCMA TEK 7-1A,
available at www.trenwyth.com.
w w w. t r e n w y t h . c o m
V S 7

architectural masonry units
Installation
Verastone ®
Verastone ® Plus
IMPORTANT! Before You Begin
Manufacturer requires that you order a full size unit
to illustrate color and texture for approval.
Manufacturer also requires a sample panel be
installed at the jobsite prior to installation of any
Trenwyth product. This panel will represent the
quality, color and texture of the product and the
workmanship to be expected for the project. Either
the owner or the project architect must approve the
panel. Failure to produce a sample panel may result
in loss of warranty. Manufacturer will provide 4" units
for a 4' x 4' sample panel at no cost for the material
(excluding freight to site).
Delivery, Storage and Handling
Verastone and Verastone Plus masonry units shall
be delivered to the jobsite on covered banded
pallets with cardboard between the layers. Store
pallets in single stacks on level ground and cover
with waterproof covering (e.g., tarpaulins) to protect
the blocks from inclement weather. Handle blocks
carefully to avoid breakage and damage to the
finished surface.
Project Site Conditions
Protection of Work: Cover walls, including open
tops, each day after installation to keep open walls
protected and dry. After units are installed, they
should be protected from damage by other trades
performing operations that can stain or otherwise
damage the finished surfaces by covering walls with
plastic. Corners should be protected from damage
after installation by covering them with plywood.
Do not, under any circumstance, install a damaged
unit that does not conform to the requirements of
ASTM C90. If units have been damaged during
transit, contact manufacturer immediately.
Laying Masonry Walls
Draw blocks from more than one pallet at a time
during installation. All exterior mortar shall include
manufacturer-approved matching water repellent
additive added to each batch in the appropriate
dosage rates for mortar type (M, S or N) per
manufacturer's instructions. Refer to NCMA TEK
Notes, available at www.trenwyth.com, for Hot and
Cold weather construction practices.
Lay units using the best concrete masonry
practices. Install only quality units; reject all
defective units as defined by ASTM C90. Lay
blocks with the faces level, plumb and true to the
line strung horizontally at the ground face. Units
shall have uniform, 3/8"-wide joints both horizontally
and vertically on the finished side of the wall. Tool
joints neatly after they are finger-hard to make them
straight and uniform. Size and place cut pieces
appropriately to maintain consistency and bond.
Complete masonry construction using procedures
and workmanship consistent with the best
masonry practices.
Lighting: Provide adequate lighting for masonry
work by placing all lighting at a reasonable distance
from the wall for even illumination. Do not use
trough lighting.
Cutting: Make all unit cuts, including those for
bonding, holes, boxes, etc., with motor driven
masonry saws, using either an abrasive or diamond
blade. Cut neatly and locate for best appearance.
Mortar Bedding and Jointing:
1. Lay units with full mortar coverage on head and
bed joints taking care not to block cores to be
grouted or filled with masonry insulation.
2. Tool all mortar joints when thumbprint hard into a
concave configuration.
3. Care should be taken to remove mortar from the
face of masonry units before it sets.
4. Tuckpoint the joints of scored units for proper
appearance. All exterior scored units must be
tuckpointed to prevent water penetration. NO
RAKE JOINTS.
Flashing of Masonry Work
Install flashing at locations shown in the plans and
in strict accordance with the details and the best
masonry flashing practices.
Weep Holes and Vents
Install weep holes and vents at proper intervals at
courses above grade and at any water stops over
windows, doors and beams. Consult NCMA TEK
Notes, available at www.trenwyth.com, for proper
flashing and drawings.
w w w. t r e n w y t h . c o m
V S 8

architectural masonry units
Installation
Verastone ®
Verastone ® Plus
Inspection
The ground faces shall conform to the requirements
of ASTM C90 when viewed from a distance of
twenty (20) feet at right angles to the wall with
normal lighting.
Installation Recommendations
• Consult NCMA TEK Notes, available at
www.trenwyth.com, for proper installation of
concrete masonry units.
• A complementary or matching mortar color is
recommended when using Verastone and
Verastone Plus units. Call 800-233-1924 and
ask to recieve a Trenwyth Mortar Kit.
Limitations
• The Verastone and Verastone Plus facing is not
intended for use as an impervious surface.
• Acid solutions/HCL acid-based cleaners should
not be used as a cleaning agent or come in direct
contact with the facing.
• Verastone and Verastone Plus facings should
not be continuously exposed to temperatures
above 250º F.
w w w. t r e n w y t h . c o m
V S 9

architectural masonry units
Cleaning
Verastone ®
Verastone ® Plus
Walls must be cleaned on a daily basis as
block laying proceeds.
Masonry surfaces clean most effectively if the
cleaning is done within 14-28 days after masonry
installation. Mortar and grout smears that remain on
the surface for a longer time result in a more difficult
cleandown and may cause undesirable results.
Final cleandown of masonry surfaces should be
completed before installation of windows, doors,
hardware, light fixtures, roofing materials and any
other non-masonry item that may be damaged by
the cleaning product. If such fixtures have been
installed, they must be protected before the cleaner
is applied. All caulking and sealant materials
should be in place and thoroughly cured before
cleaning begins.
Protect all surrounding metal and non-masonry
materials, painted surfaces and plant life from
contact with the cleaner, residue or fumes.
Masonry Cleaners
Use Burnished Custom Masonry Cleaner by
PROSOCO following manufacturer’s instructions
(dilute one part to 3 parts clean water). Available
from manufacturer. Do not powerwash.
CAUTION! Never use muriatic acid on units.
Prior to overall application, always test the cleaner
(minimum 4' x 4' area) to ensure suitability and
desired results. Test each type of masonry and each
type of stain. Allow test area to dry for 3 – 7 days
before inspection and approval by the project
architect or building owner. Clean test areas
according to the application below and always
make the test panel available throughout the
cleaning project.
• Always pour cold water into an empty bucket first
before carefully adding detergent.
• Never use hot water.
• Handle in polyethylene or rubber buckets only.
• Acidic materials and fumes will attack metal.
Exterior Test Application
The following cleaning procedure is recommended
unless otherwise indicated during testing:
1. Thoroughly saturate a large portion of the
masonry surface with clean water.
2. Using a densely-packed, soft-fibered masonry
washing brush or low-pressure spray (50 psi
maximum), apply diluted solution freely. (Do not
apply Burnished Custom Masonry Cleaner with
pressure spray above 50 psi. Such an application
will drive the chemicals deep into the surfaces
making it more difficult to rinse completely.)
3. Depending on the absorption rate of masonry
and drying conditions, allow cleaning solution
to remain on the wall for approximately five (5)
minutes. Do not allow cleaner to dry into the
masonry because it may leave a residue and
cause staining.
General
• Keep walls clean by using brushes or rags and the
burlap squares supplied on the Verastone and
Verastone Plus pallets.
• Do not allow excess mortar lumps or smears to
harden on the finished surfaces.
• Remove green mortar with burlap or a dry cloth.
• Wipe masonry blocks clean with burlap (provided
with every other cube) as the blocks are laid
each day.
• Protect stored materials and the wall prior to
completion to prevent excessive water entry and
external soiling.
• Protect the exposed portions of metal fixtures.
(Harsh cleaning methods after walls have been
erected may mar the surface of the blocks.)
• Protect adjacent masonry and floor area by
saturating with water and flushing away any
cleaning solution before it dries.
w w w. t r e n w y t h . c o m
V S 1 0

architectural masonry units
Cleaning
Verastone ®
Verastone ® Plus
Materials
• Two plastic or hard rubber buckets
• Rubber gloves
• Soft fiber masonry brushes (or whitewash brushes)
• Wooden, plastic or other soft, non-staining
scraping device
• Supply of “clean” wipers, such as lint-free cloths
or paper towels
• Clean water
• Burnished Custom Masonry Cleaner (dilute one
part to 3 parts of clean water). Do not apply the
Burnished Custom Masonry Cleaner with pressure
spray above 50 psi. It will cause efflorescence.
DO NOT USE ACID OR CLEANER WITH
HCL BASE.
Cleaning Procedure 1
1. Brush clean water liberally on the surface area to
be cleaned. Brush approximately one square yard
at a time.
2. It is important that the masonry wall be kept wet
at all times. Do not use dirty water.
3. Apply cleaning solution brushing in a circular
motion to remove any unwanted mortar smears.
4. Remove excess lumps of mortar with the soft
(wood or plastic) scraping device and re-apply
cleaning solution.
5. Allow cleaning solution to remain on the surface
for two or three minutes then wash off with liberal
amounts of fresh, clean water.
6. Wipe the walls down completely dry with clean,
dry wipers.
Cleaning Procedure 2
If liberal amounts of water cannot be used, an
alternative procedure may be employed.
1. Soak a clean wiper in the cleaning solution. Wring
it out so it is wet enough to dampen the surface,
but dry enough so that the solution will not run
down the wall.
2. Allow the solution to remain on the surface for
two or three minutes. Remove excess lumps of
mortar with the soft scraping device and repeat
Step #1.
3. Wipe the wall completely dry with clean,
dry wipers.
Note: To remove mortar smears that have been
allowed to harden on the wall and cannot be
removed by following the procedures listed above,
a solution of Burnished Custom Masonry Cleaner by
PROSOCO may be used with a dilution ratio of 1
part cleaner to 3 parts clean water, strictly following
manufacturer’s instructions.
WARNING! Never use muriatic acid solutions on
Verastone or Verastone Plus units.
Final Cleandown
Clean the completed walls with a detergent
masonry cleaner strictly following the manufacturer’s
instructions including thorough rinsing. Do not use
acid or abrasives on the block surfaces. For
stubborn mortar stains or smears, a 3:1 solution
of Burnished Custom Masonry Cleaner by
PROSOCO may be used as long as the walls are
thoroughly wetted with clean water before applying
the cleaning solution and thoroughly rinsed with
clean water immediately after washing. Failure to
strictly follow manufacturer’s instructions can result
in permanent damage to the finished faces.
DO NOT POWERWASH .
w w w. t r e n w y t h . c o m
V S 1 1

architectural masonry units
Cleaning
Verastone ®
Verastone ® Plus
Maintenance
Verastone and Verastone Plus units, properly
installed and cleaned, need virtually no
maintenance other than routine cleaning with
standard commercial grade cleaning agents such
as PINESOL ® or FANTASTIK ® . Graffiti, paint or
dye may need special cleaning methods and
products such as Trenwyth Graffiti Wizard ®
environmentally friendly cleaner. Contact
manufacturer for specific cleaning
recommendations. DO NOT POWERWASH.
Field Coat Application
For required field coat application instructions, see
Pages VS 13–14.
Graffiti Removal Recommendation
Graffiti Wizard environmentally friendly cleaner
removes most paints and permanent markers,
varnish, glue, crayon, oil, grease, food spills, etc.
from Verastone Plus surfaces. Apply Graffiti Wizard
using a brush or cloth. Let stand 10 second to 20
minutes, depending on the severity of the stain. If
using on a more porous or textured surface, a nonmetallic
stiff bristle brush may be required. Wipe the
surface with a damp cloth. After the stain is
removed, neutralize the surface with water making
sure that all of the Graffiti Wizard is removed from
the surface. Graffiti Wizard is available in 4-oz.,
12-oz., 1 gallon and 5 gallon containers. To order,
call (800) 233-1924. Always follow manufacturer’s
safety precautions. (See Graffiti Wizard ® literature,
TR2810, behind General Information tab.)
w w w. t r e n w y t h . c o m
V S 1 2

architectural masonry units
Field Coat Application
Verastone ®
Verastone ® Plus
For completely finished walls, a finish coat of
proprietary TRENDCOAT ® acrylic (minimum 20%
solids content) or TRENDCOAT ® WB (water-based)
is recommended. Apply to all Verastone and
Verastone Plus walls after cleandown and when the
walls are completely dry. Apply the acrylic evenly to
cover the entire surface without forming drips or
runs. For maximum coverage and best appearance,
apply TRENDCOAT or TRENDCOAT WB with airless
spray equipment.
TRENDCOAT clear, high-solids acrylic offers
excellent graffiti resistance, provides moisture
resistance and helps to cover any scuffs or
scratches that may occur during handling
and/or installation.
TRENDCOAT WB (water-based) may be used in
lieu of TRENDCOAT. Some interior applications
may require a water-based coating material only.
TRENDCOAT WB provides the same benefits as
TRENDCOAT but may not provide the rich gloss
achieved by using TRENDCOAT.
Always produce a sample area of the TRENDCOAT
or TRENDCOAT WB finish for architect/owner
approval prior to applying the finish coat to the
entire surface.
Product Description
High-solids TRENDCOAT and water-based
TRENDCOAT WB are high quality, non-yellowing
sealers specifically formulated for field coating
Verastone and Verastone Plus masonry units. The
sealers offer outstanding durability that beautifies the
natural color of the Verastone and Verastone Plus
ground and polished surfaces.
Application
Apply TRENDCOAT or TRENDCOAT WB to all
Verastone and Verastone Plus walls after cleandown.
TRENDCOAT and TRENDCOAT WB are ready to
use and requires no mixing or dilution. Apply
TRENDCOAT to clean, dry walls when the
temperature is above 55º F. It should not be applied
at temperatures lower than 55º F. All washdown
activities for removal of mortar paste must be
completed. TRENDCOAT and TRENDCOAT WB
are sprayable with an airless sprayer or it can be
applied using a brush, roller or long nap applicator.
TRENDCOAT and TRENDCOAT WB shall be applied
evenly to cover the entire surface without forming
drips or runs.
• Keep container tightly closed when not in use.
• New mortar or adjacent concrete must cure for a
minimum of 7 days before application.
• The best results are obtained using airless spray
paint equipment. The surface must be completely
covered to seal out water.
• Clean tools with Xylene immediately after use.
Application Precaution
TRENDCOAT is flammable. Use only in wellventilated
or open areas. Keep away from extreme
heat or open flame. Avoid breathing vapors,
prolonged and repeated contact with skin and
contact with eyes.
Advantage
TRENDCOAT and TRENDCOAT WB provide
maximum protection from the damaging effects of
air pollution, sun and extreme weather conditions.
It covers and seals scuffs, scratches and small
chips that may occur in the Verastone and
Verastone Plus surface during installation and seals
the faces and the joints. Because it is the same
basic coating material which is used in the factory,
it is completely compatible with the Verastone and
Verastone Plus finishes.
w w w. t r e n w y t h . c o m
V S 1 3

architectural masonry units
Field Coat Application
Verastone ®
Verastone ® Plus
Technical Information
TRENDCOAT ® :
Coverage: 265 sq ft/gal @ 1.0 dry mil. Suggested
mils applied should not exceed 5.0 wet mils to
achieve block protection and cosmetics.
Flash Point: 3º F
Normal Cure Time: @ 70º F – 50% RH:
10 minutes
Solids Content: 16.5%
Weight solids: 20%
VOC: 357.88 grams/liter solids
Environmentally compliant in most states.
Low HAPS: below 1%
Weight per Gallon: 7.49 lbs./gal
Gloss: Full
TRENDCOAT ® WB:
Coverage: 563 sq ft/gal @ 1.0 dry mil. Suggested
mils applied should not exceed 5.0 wet mils to
achieve block protection and cosmetics.
Flash Point: 212º F
Normal Cure Time: @ 5-7 days for complete cure.
Dry to the touch in 10 to 15 minutes.
Solids Content: 35%
Weight solids: 38%
VOC:
151.85 grams/liter (minus water)
175.54 grams/liter (solids)
Environmentally compliant in most states.
HAPS-free
Weight per Gallon: 8.71 lbs./gal
Gloss: Full
Flammability: TRENDCOAT WB is not flammable.
w w w. t r e n w y t h . c o m
V S 1 4

architectural masonry units
Shapes & Sizes
Coding System
Verastone ®
Verastone ® Plus
Shapes and Sizes Coding System
All units are nominal 8" and 16" lengths unless
modified by symbols as noted below. In some
instances, only the first two (2) symbols will be used.
Other symbols are added as required.
The coding system is based on a series of symbols
that define the size, general type and variance from
standard length and return.
1. The 1st part is the number denoting the
nominal thickness:
1", 2", 4", 6", 8", 10" and 12"
2. The 2nd part is the letter or combination of letters
denoting the general type of unit.
F = 1 Face Ground
FF = 2 Faces Ground
E = End Ground
EE = 2 Ends Ground
V = Vertical Score
H = Horizontal Score
BN = Bull Nose
T = Top Ground
B = Bottom Ground
C = Chamfer Ground
U = Bond Beam (specify open
or solid bottom)
3. The 3rd part is a number denoting length of the
unit varying from the standard 16" length.
Example: 4FE8 is a 4" thick face and end
ground unit that is 8" long.
4. The 4th part is a letter denoting the hand of the
appropriate return unit.
R = Right Hand L = Left Hand
5. SPECIAL NOTE: For unit heights varying
from the nominal 8", the numeral denoting
height immediately follows the numeral
denoting thickness.
Example: 64FEBN is a nominal
6" thick, 4" high face ground,
end ground, bullnose unit.
6. DA# denotes the scoring pattern.
(See Page VS 17)
w w w. t r e n w y t h . c o m
V S 1 5

architectural masonry units
Shapes & Sizes
Verastone ®
Verastone ® Plus
Note: Not all sizes are shown in this brochure. Please consult your nearest manufacturing facility.
Metric shapes and sizes are available.
2F
7 5/8"
4FT
7 9 /16"
4FE
7 5/8"
4F
7 5/8"
6F
8F
15 5/8"
3 9 /16"
15 5 /8"
15 9/16"
1 9/16" Also available in 6, 8,
Available in hollow,
10 & 12” thicknesses. semi-solid or solid units.
8FE
8FEBN
10F
44F
3 9/16"
3 9/16"
15 5/8"
3 5 /8"
75/8"
5 9/16" 155/8"
8FT
7 9/16"
8FETR*
75/8"
155/8"
7 9/16"
15 9/16" 7 5/8"
15 5/8"
7 9/16" 3 9/16"
Also available in 8" thickness.
8F8 Solid
8F8 Hollow
7 5/8"
7 9/16"
7 9/16"
Also available in 4, 6,
10 & 12" thicknesses.
8FTBN 4 FE 135º
15 9/16"
7 5/8"
7 5/8"
"
4 FE L CORNER
7 9/16"
9 9/16"
KOBB
(Open Bottom)
15 5/8"
15 9/16"
7 5/8"
Also available in 12” thickness.
3 9/16"
7 5/8"
7 5 /8"
3 9 /16"
15 5 /8"
Also available in 2, 6, 8, 10
& 12” thicknesses.
8UF (v-block)
7 9/16"
FHA
(KOBB with
Solid Bottom)
15 5/8"
7 5/8"
7 5 /8"
79/16"
155/8"
79/16"
7 9/16"
code designations
F = 1 Face Ground
FF = 2 Faces Ground
E = End Ground
EE = 2 Ends Ground
V = Vertical Score
H = Horizontal Score
BN = Bull Nose
T = Top Ground
B = Bottom Ground
C = Chamfer Ground
U = Bond Beam
15 9/16" 7 9/16"
Also available in 2, 4
& 6" thicknesses.
*Specify right or left (right shown)
7 9/16"
7 5/8"
Also available in 2, 4,
6, 10 & 12” thicknesses.
7 9/16"
7 5/8"
7 9 /16"
15 5 /8"
Also available in 6,
10 & 12” thicknesses.
7 9 /16"
15 5 /8"
Also available in 6,
10 & 12” thicknesses.
Chamfered corners minimize chipping and eliminate sharp corners. Not all chamfer designations are shown.
Any side can be chamfered.
8FE C1
8FT C2 8FET * C4
8FFE C5
Chamfers
All Trenwyth concrete masonry
units are manufactured with
an integral moisture resistant
admixture to repel moisture and
prevent mold and efflorescence.
8FEE C11
1"
*Specify right or left (right shown)
Verastone ® /Acousta-Wal ® units
Control noise pollution in your
project with Verastone ® /
Acousta-Wal ® units.
For more information refer
to the Acousta-Wal ® section.
Type IV
w w w. t r e n w y t h . c o m
V S 1 6

architectural masonry units
Scoring Patterns
Verastone ®
Verastone ® Plus
• Score Dimensions. The width of the score is 3/8".
• Tuckpoint and scored joints. All scored joints
must be tuckpointed to prevent moisture
penetration and to match the real joints between
the blocks. This gives a more realistic, pleasing
appearance to the finished wall.
• Special scoring. Written dimensions and a sketch
are required in order to produce special scoring.
Limitations: No more than five (5) vertical scores or
two (2) horizontal scores are acceptable on the
face of a block. DO NOT USE RAKE JOINTS.
V1 V2 H1
8x8 Score 8x5 Score 4x16 Score
Design Your Own
w w w. t r e n w y t h . c o m
V S 1 7

architectural masonry units
Chamfered Edge
Coding System
Verastone ®
Verastone ® Plus
C1 C2 C3 C4*
C5 C6 C7 C8
Notes:
C9* C10* C11 Design your own
1) *For these units designate left L (left) or R (right). (Right shown)
2) Show Faces to be ground as: F (face), E (end), T (top), B (bottom).
3) If you need a configuration not shown simply mark up one of the "Design your own" above
and fax it to us at PA (717) 767-4023, IL (815) 416-0382 or AZ (623) 435-2088. The chamfer
designation will be CS (Chamfer Special).
4) A standard chamfer is 1" at a 45º angle. Please clearly designate any variations.
w w w. t r e n w y t h . c o m
V S 1 8

architectural masonry units
Chamfered Edge Design
Recommendations
Verastone ®
Verastone ® Plus
When chamfered edges are required, the following variations are available. Ony angles of 30º, 45º or 60º
may be supplied on any of the edges of Verastone or Verastone Plus units.
See details below:
30º 45º 60º
These three standard angles may be used on any size block and the width of the chamfer may be varied.
Typically chamfers are 1", 2", 3" or 4" wide.
Any or all edges may be chamfered.
2 Inch @ 45º
END
END
Standard Chamfer
1 Inch @ 45º
Standard Chamfer
1"
Always Designate size of chamfer when ordering.
w w w. t r e n w y t h . c o m
V S 1 9

architectural masonry units
Bullnose Edge Codes
Verastone ®
Verastone ® Plus
B1 B2 B3 B4*
B5 B6 B7 B8
Notes:
B9* B10* B11 Design your own
1) *For these units designate left L (left) or R (right). (Right shown)
2) Show Faces to be ground as: F (face), E (end), T (top), B (bottom).
3) If you need a configuration not shown, simply mark up one of the "Design your own" above
and fax it to us at PA (717) 767-4023, IL (815) 416-0382 or AZ (623) 435-2088. The bullnose
designation will be BNS (Bullnose Special).
4) You may be required to produce architectural drawings prior to production. All drawings for special
units require approve with authorized signatures.
w w w. t r e n w y t h . c o m
V S 2 0

architectural masonry units
Frequently Asked
Questions
Verastone ®
Verastone ® Plus
1. How is the product made? What is the difference between Verastone and Verastone Plus?
Verastone recycled ground face masonry units are integrally colored concrete blocks with one or more
faces ground to expose the variegated colors of the natural aggregates. A special additive is included in
the concrete mix design to prevent efflorescence. A factory-applied, clear satin gloss acrylic accentuates
and highlights each burnished face and provides moisture resistance.
Verastone Plus recycled filled and polished masonry units offer a smooth terrazzo look on one or more
of the faces. After the initial grinding process to expose the variegated colors of the natural aggregates,
the pores and interstices are filled with a cementitious grout. The exposed faces are then polished
smooth in a multi-stage polishing process and a factory-applied clear satin gloss acrylic or water-based
sealer is applied to accentuate the natural beauty of the aggregates and provide moisture resistance.
Verastone and Verastone Plus both contain a significant amount of recycled content that may earn
LEED ® points for your building.
2. Is the color on the surface or all through the block?
The color is integral, i.e. it is uniform throughout the concrete block.
3. Why is the color different depending on which plant makes the blocks?
The aggregates used to make the blocks at each plant come from different sources and are, therefore,
of different colors and particle shapes. This changes the color and appearance of the finished product.
4. How can I be sure it will not be chipped and scuffed in shipment and jobsite handling?
Trenwyth products are manufactured, packaged and shipped with great care to protect the finished
surfaces. The units are placed on sturdy wooden pallets and a layer of heavy cardboard is placed
between each layer of blocks. The entire cube is then covered with a heavy gauge plastic bag and
strapped with steel banding. Verastone and Verastone Plus units should be handled as finished material
on the jobsite to avoid scuffing, chipping or other damage.
5. Can I grind these blocks at the jobsite?
No. Precision equipment is needed to grind and polish Verastone and Verastone Plus units and this can
only be done satisfactorily in the factory.
6. Can any mason install this product?
Any mason can install this product. Masons experienced in laying architectural blocks who are good
craftsmen can lay ground face blocks very well. Unfortunately, no matter how well our blocks are
manufactured, if they are not laid well, the appearance of the project is diminished.
7. What is the difference between lightweight, medium-weight and normal-weight blocks?
ASTM C90 specification for load-bearing concrete masonry units defines lightweight as concrete less
than 105 lbs per cu. ft., mediumweight as concrete between 105 and 125 Ibs per cu. ft. and
normalweight as concrete of 125 lbs per cu. ft. or more.
The aggregate used to make lightweight blocks is usually expanded shale, expanded clay, pumice or
some similar type of open-cell material. By its nature such aggregate is porous and will allow some
moisture penetration. ASTM C90 sets the maximum rate of absorption at 18 lbs per cu. ft. for
lightweight, 15 lbs per cu. ft. for mediumweight and 13 lbs per cu. ft. for normalweight. Most Verastone
and Verastone Plus units are medium-weight.
w w w. t r e n w y t h . c o m
V S 2 1

architectural masonry units
Frequently Asked
Questions
Verastone ®
Verastone ® Plus
8. What is the surface coating?
A clear high solids acrylic coating (TRENDCOAT) or a water-based coating (TRENDCOAT WB) is applied
in the factory after the blocks are ground and polished. It is completely light stable and will not
deteriorate with exterior exposure and weathering.
9. Why do you recommend walls have a field coat? Is the field coating necessary?
The factory-applied coating is designed primarily to protect the Verastone and Verastone Plus surface
during shipment and installation. The field coat covers and enhances the entire wall including the mortar
joints and it hides most scuffs, scratches and nicks that occur during handling and installation. We
recommend field coating because it puts the finishing touch to the installation and brings out the full
beauty of Verastone and Verastone Plus units.
10 What is the life expectancy of the product?
50 years plus — if the building is properly designed and the Verastone and Verastone Plus units are
installed correctly.
11. At what temperature should the TRENDCOAT ® and TRENDCOAT WB field coating be applied
or not applied?
The TRENDCOAT ® and TRENDCOAT WB coating should be applied to dry walls when the temperature
is above 55° F. It should not be applied at temperatures lower than 55° F.
12. Will the TRENDCOAT ® or TRENDCOAT WB coating peel, fade, crack or spall?
TRENDCOAT ® and TRENDCOAT WB are high-quality sealers and will not peel, fade, crack or spall
when properly applied to a dry surface. However, if the walls are not properly designed or constructed
with appropriate flashing, weeps, vents, etc., and the substrate block is continuously saturated behind
the acrylic, deterioration may occur over time.
13. Can you control the color consistency?
Great care is taken in the Verastone and Verastone Plus manufacturing processes to ensure a high
degree of color consistency. This includes checking incoming raw materials, use of computer controlled
precision automatic color injection equipment, and precise control of the moisture and curing process.
As with any natural product, there are minor color variations from block to block. Final inspection
includes dry stacking samples drawn from the production line every half hour and comparing those
samples to the master sample for that project. Always request a jobsite field panel to be erected to
show the expected unit and mortar color.
14. Can you match colors?
Yes, within the limitations of the aggregates available at each of our plants.
15. If I want to put on an addition a year or more after the original installation of Verastone
blocks, will the new Verastone blocks match the old?
We can usually match previously manufactured colors quite well. However, we recommend that,
if possible, a small piece be cut or chipped from the existing wall and sent to us. If that is not possible,
a new sample of the color should be visually compared to the existing wall and adjustments made to
the color if necessary. Aggregates are a product of “Mother Nature”, however, and can vary over time.
Always order a current full size sample to verify color.
w w w. t r e n w y t h . c o m
V S 2 2

architectural masonry units
Frequently Asked
Questions
Verastone ®
Verastone ® Plus
16. What special precautions should be taken in the handling, storage and installation
of the product?
Refer to the Verastone and Verastone Plus Installation & Cleaning sections behind this tab.
17. Can Verastone and Verastone Plus units be used in flooring or paving?
No. Verastone and Verastone Plus units are designed as wall material and are not suitable for flooring
or paving.
18. How does one patch this product? Can chips in the wall be repaired?
Damaged or chipped units that do not meet requirements of ASTM C90 for the block should not be
installed. If units incur damage during installation or by other trades, a patch kit can be ordered from
manufacturer. Follow manufacturer's instructions for best results.
19. Why should I pay a premium for Verastone and Verastone Plus units when there are so many
other less expensive ground face blocks, split-face blocks or bricks?
Verastone and Verastone Plus units are the highest quality recycled ground face or burnished blocks
available. If quality and service are important to you -- you should specify and use Verastone and
Verastone Plus units.
20. What special shapes are available? Can you provide bullnose corners? Are they available in
larger sizes?
A large assortment of special shapes are available or can be made. We have numerous molds, jigs, etc.
-- the most in the industry. Give us a drawing or sketch of the special shapes you would like and let us
show you what we can do. We offer a chamfered corner as well as a bullnose. A full range of over-sized
units are also available. See the Monumental tab in this binder.
21. What do I use for the washdown to remove mortar and scum?
Refer to the Verastone and Verastone Plus Installation & Cleaning sections behind this tab.
22. What happens if acid is used on Verastone and Verastone Plus blocks?
Cleaners that use a harsh acid (like HCL) as a base can attack the acrylic sealer, degrading the coating
and etch the pigment in the blocks. Use only the recommended cleaner on Trenwyth products.
23. Are the blocks UL rated?
Verastone and Verastone Plus blocks are tested annually to Underwriter Laboratories (UL) standards by
various independent testing laboratories. Therefore, they are UL rated although they are not UL listed,
as there is no requirement that ground face blocks be UL listed in the United States.
24. Can I return blocks I do not use?
No. All Verastone and Verastone Plus blocks are custom made. We require a signed sales contract
before we will start manufacturing any order. Since we don’t make any blocks for stock, any Verastone
and Verastone Plus blocks that are ordered in excess must be shipped and cannot be returned.
25. Is the score cast or cut?
The score is cut into the finished side of Verastone and Verastone Plus blocks.
w w w. t r e n w y t h . c o m
V S 2 3

architectural masonry units
Frequently Asked
Questions
Verastone ®
Verastone ® Plus
26. Can I get the back side of the exposed, unfinished block scored to match the score on the
finished face?
Yes.
27. Do I tuckpoint the scored joint?
The scored joints must be tuckpointed to match the rest of the mortar joints. If they are not tuckpointed,
the continuity between the scored joint and the mortar joint is lost. Rake joints are not permitted on
Verastone or Verastone Plus.
28. Is there any special mortar required?
Colored mortar that matches or complements the Verastone and Verastone Plus colors can create a
beautiful effect. For more information on mortars see Mortars in the General Information section of this
binder or call your Trenwyth manufacturing facility and ask for a Trenwyth Mortar Kit. A Trenwythapproved
integral water repellent admixture is recommended for all exterior mortar.
w w w. t r e n w y t h . c o m
V S 2 4

architectural masonry units
Colors
Verastone ®
Verastone ® Plus
Eastern Selection
Note: All color samples are intended to be representative only. For accurate color selection, always request a full size sample.
Chablis
Group C
Vintage
Group C
Palomino
Group C
Rhine Grey
Group C
Chianti
Group C
Midwest Selection
Note: All color samples are intended to be representative only. For accurate color selection, always request a full size sample.
Chardonnay
Group C
Superior
Group C
Austin
Group C
Toffee
Group C
Old Country
Group C
Cambria
Group C
Fossil Reef
Group C
Cabernet
Group C
Schiraz
Group C
Verastone ® Plus recycled filled and polished masonry units offer the look of a smooth terrazzo finish in the
Verastone ® recycled ground face masonry unit color line. Discover the difference:
Verastone ® recycled
ground face finish
Verastone ® Plus recycled
filled and polished
masonry units finish
w w w. t r e n w y t h . c o m
V S 2 5

Trendstone ®
ground face masonry units
Trendstone ® Plus
filled and polished masonry units
natural color and beauty exposed –
yet protected from Mother Nature.

04
Trendstone ground face masonry units are integrally colored block with one or more faces
ground to expose the variegated color of the natural aggregates.
Trendstone Plus filled and polished masonry units offer a smooth terrazzo look. After the
initial grinding process, as a cementitious grout is added to the pores and interstices of the
unit. The filled units are then polished smooth in a multi-stage polishing process to produce
an impervious, graffiti resistant surface.
Trendstone ® and Trendstone Plus ® advantages at a glance
One-step Installation Single trade installation of finished load-bearing or non-load-bearing walls saves time
and money.
Preserved Beauty The factory-applied clear satin gloss or water-based sealer further accentuates the
natural beauty of the aggregates while providing additional protection from moisture
and the elements.
Trendstone Plus Advantages Trendstone Plus offers smooth finished surfaces as the pores and interstices of the ground
surfaces are filled with a cementitious grout and polished smooth in a multi-stage process.
Offering the look of a terrazzo finish, the polished surface of Trendstone Plus is the ultimate
in cleaning and stain protection. The surfaces resist stains and chemicals; paint, marker
and graffiti clean off easily.
Durability Trendstone and Trendstone Plus feature built-in ductility and durability.
Moisture / Mold Resistant All Trendstone and Trendstone Plus are manufactured with an integral water repellent
admixture to repel moisture, prevent mold and efflorescence.
Low Maintenance The units are virtually maintenance free and will last the lifetime of your building with
no refinishing.
Colors, Shapes & An extraordinary color palette and a wide variety of shapes and scoring patterns are
Scoring Patterns available for maximum design flexibility.
Fire Protection Trendstone and Trendstone Plus features up to a 4-hour fire rating, depending on the
thickness and internal configuration of the block.
Regional Color Options The aggregates are native to your region allowing your building to blend naturally
with your environment.
Sound-Absorbing Option Trendstone ground face masonry units are available in Acousta-Wal ® sound-absorbing units.
Over-sized Units Trendstone and Trendstone Plus are available in Monumental over-sized units..
Availability Trendstone and Trendstone Plus are manufactured nationwide to provide convenient
service anywhere in the USA.
Trendstone ®
ground face masonry units
Trendstone ® Plus
filled and polished masonry units

architectural masonry units
Table of Contents
Trendstone ®
Trendstone Plus ®
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TS 1
R-Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TS 2 – 5
ASTM Reports. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TS 6
Block Characteristics/Fire Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TS 7
Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TS 8 – 9
Cleaning Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TS 10 – 12
Field Coat Application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TS 13 – 14
Shapes & Sizes Coding System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TS 15
Shapes & Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TS 16
Scoring Patterns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TS 17
Chamfered Edge Coding System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TS 18
Chamfered Edge Design Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TS 19
Bullnose Edge Coding System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TS 20
Frequently Asked Questions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TS 21 – 24
Trendstone ® Colors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TS 25 – 27
Trendstone Plus ® Colors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TS 28 – 30
w w w. t r e n w y t h . c o m
T S T O C

This page intentionally left blank

Trendstone and Trenstone Plus
Specifications
PART 1 – GENERAL
SUBMITTAL
Submit color samples for selection from manufacturer’s
group A, B, C, D or E. Submit product literature,
certifications, test reports and full size sample(s) of
each color specified.
QUALITY ASSURANCE
Certifications: Concrete blocks for grinding shall conform to
ASTM C90. After the initial grinding process to expose the
variegated colors of the natural aggregates, the pores and
interstices of Trendstone Plus filled and polished units are
filled with a cementitious grout and polished smooth in a
multi-stage polishing process. Both the ground face and
filled and polished surfaces shall have a factory-applied
heat-treated acrylic or water-based sealer finish.
All units contain a manufacturer-approved integral waterrepellent
CMU admixture at the time of manufacture.
Trendstone Plus filled and polished units shall conform to
the requirements of ASTM C744-08 and all applicable
Federal Specifications.
Both Trendstone and Trendstone Plus contain preconsumer
recycled content. Contact your Trenwyth
representative for details.
Fire Resistance: Fire rated for up to 4 hours. Define hourly
ratings required by NCMA TEK Notes, available at
www.trenwyth.com.
Field Constructed Mock-ups: Construct a sample panel, no
less than 4' x 4', of units of each color and size to be used
in the project.
A full size unit is required to illustrate color and texture for
approval. Manufacturer requires a sample panel be installed
at the jobsite prior to installation of any Trenwyth product.
This panel will represent both the quality of the product and
the workmanship to be expected for the project. The panel
must be approved by either the owner or architect for the
project. Manufacturer will provide 4" units for a 4' by 4'
sample panel at no cost for the material (excluding freight
to site).
DELIVERY, STORAGE AND HANDLING
Units shall be delivered to the jobsite on covered banded
pallets with cardboard between layers. Store pallets in
single stacks on level ground and cover with waterproof
covering (e.g., tarpaulins) to protect the blocks from
inclement weather. Handle blocks carefully to avoid
breakage and damage to the finished surfaces.
PROJECT/SITE CONDITIONS
Protection of Work: Cover walls each day after installation
to keep open walls protected and dry. After units are
installed they should be protected from damage by other
trades performing operations that can stain or otherwise
damage the finished surfaces by covering walls with plastic.
Corners should be protected from damage after installation
by covering them with plywood.
PART 2 – PRODUCTS
PRODUCT NAME
Trendstone ® recycled ground face masonry units
Trendstone ® Plus recycled filled and polished masonry units
MANUFACTURER
Anchor Concrete Products (800) 233-1924
One Connelly Road • Emigsville, PA 17318
Northfield Block Company (800) 358-3003
3400 E. Bungalow Road, Morris, IL 60450
RELATED MATERIALS
Colored matching or contrasting mortar is available from
manufacturer. Consult NCMA TEK Notes, available at
www.trenwyth.com, for mortar type and specifications. For
all exterior mortar, use matching manufacturer-approved
water repellent mortar admixture following manufacturer's
instructions. Consult manufacturer for recommendations.
SIZES AND SHAPES
Surfaces are manufactured to provide finished dimensions
of 7-5/8" x 15-5/8" ± 1/8". Bed depth dimensions for single
face units are 3-9/16", 5-9/16", 7-9/16", 11-9/16" ± 1/8".
Two face units are 3-1/2", 5-1/2", 7-1/2", 11-1/2", ± 1/8".
Nominal 2", 4", 6", 8", 10" and 12" standard block
thickness are available as well as all standard block shapes.
High-strength units for special structural requirements, oversized
units, and metric shapes and sizes are also available.
MASONRY CLEANERS
Carefully following manufacturer’s instructions, use
Burnished Custom Masonry Cleaner by PROSOCO (dilute
1 part to 3 parts clean water). Available from manufacturer.
Do not powerwash.
CAUTION! Never use Muriatic Acid solution or any cleaner
with an acid base on units.
PART 3 – EXECUTION
LAYING MASONRY WALLS
Draw blocks from more than one pallet at a time during
installation. All exterior mortar shall include manufacturerapproved
matching water-repellent additive added to each
batch in the appropriate dosage rates for mortar type (M, S
or N) per manufacturer's instructions. Refer to NCMA TEK
Notes, available at www.trenwyth.com, for Hot and Cold
weather construction practices.
Lay units using the best concrete masonry practices. Install
only quality units; reject all defective units as defined by
ASTM C90. Lay blocks with the faces level, plumb and true
to the line strung horizontally at the ground or filled and
polished face. Units shall have uniform, 3/8"-wide joints
both horizontally and vertically on the finished side of the
wall. Tool joints neatly after they are finger-hard to make
them straight and uniform. Size and place cut pieces
appropriately to maintain consistency and bond. Complete
masonry construction using procedures and workmanship
consistent with the best masonry practices.
INSTALLATION
Lighting: Provide adequate lighting for masonry work by
placing all lighting at a reasonable distance from the wall for
even illumination. Do not use trough lighting.
Cutting: Make all unit cuts, including those for bonding,
holes, boxes, etc., with motor-driven masonry saws, using
either an abrasive or diamond blade. Cut neatly and locate
for best appearance.
MORTAR BEDDING AND JOINTING
1. Lay units with full mortar coverage on head and bed
joints taking care not to block cores to be grouted or
filled with masonry insulation.
2. Tool all mortar joints when thumbprint hard into a
concave configuration.
3. Care should be taken to remove mortar from the face of
masonry units before it sets.
4. Tuckpoint the joints of scored units for proper
appearance. All exterior scored units must be
tuckpointed to prevent water penetration. NO
RAKE JOINTS.
FLASHING OF MASONRY WORK
Install flashing at locations shown in the plans and in
strict accordance with the details and the best masonry
flashing practices.
WEEP HOLES AND VENTS
Install weep holes and vents at proper intervals at courses
above grade and at any water stops over windows, doors
and beams. Consult NCMA TEK Notes, available at
www.trenwyth.com, for proper flashing and drawings.
INSPECTION
The faces shall conform to the requirements of ASTM C90
when viewed from a distance of twenty (20) feet at right
angles to the wall with normal lighting.
CLEANING
Keep walls clean daily during installation using brushes,
rags and the burlap squares supplied on the pallets. Do
not allow excess mortar lumps or smears to harden on
the finished surfaces. Harsh cleaning methods after walls
have been erected will mar the surface of the blocks.
FINAL CLEANDOWN
Clean the completed walls with PROSOCO Burnished
Custom Masonry Cleaner (dilute 1 part to 3 parts clean
water), strictly following the manufacturer's instructions –
including thorough rinsing. Do not use acid or abrasives
on the finished surfaces. Failure to strictly follow
manufacturer’s instructions can result in permanent
damage to the finished faces. Do not apply Burnished
Custom Masonry Cleaner with pressure spray above
50 psi. Do not powerwash.
FIELD COAT APPLICATION
For completely finished walls, a finish coat of
TRENDCOAT ® Acrylic (minimum 20% solids content) or
TRENDCOAT ® WB (water-base) is recommended. Apply
to walls after cleandown and when the walls are dry. Apply
the acrylic evenly to cover the entire surface without
forming drips or runs. For maximum coverage and best
appearance, apply TRENDCOAT Acrylic or TRENDCOAT
WB with airless spray equipment. Consult manufacturer
for further information. This clear, high-solids acrylic,
provides moisture resistance and helps to cover any
scuffs or scratches that may occur during handling and/or
installation. TRENDCOAT also offers excellent graffiti
resistance for Verastone Plus filled and polished units.
MAINTENANCE
Properly installed and cleaned, units need virtually no
maintenance other than routine cleaning (i.e. Pinesol or
Fantastik). Graffiti, paint or dye stains may need special
cleaning methods and products such as Trenwyth
Graffiti Wizard ® environmentally friendly cleaner. Contact
manufacturer for specific cleaning recommendations.
INSTALLATION RECOMMENDATIONS
Consult NCMA TEK Notes, available at www.trenwyth.com,
for proper installation of concrete masonry units.
TS 1

This page intentionally left blank

architectural masonry units
R-Values
Trendstone ®
Trendstone Plus ®
R-values of concrete masonry walls are correlated to concrete density, since thermal conductivity of
concrete increases with increasing density. The following tables list a range of R-values for each density.
Contact your sales representative or specific block densities.
Table 2 — R-Values For 6 in. (152 mm) Concrete Masonry Walls, hr . ft 2.o F/Btu a
Cores filled with:
Density of
concrete
Cores empty
Perlite
Loose-fill insulation
Vermiculite
Polyurethane
foamed insulation
Solid grouted
Construction
Exposed
block, both
sides
pcf range mid range mid range mid range mid range mid
85 2.2-2.5 2.4 4.8-6.1 5.3 4.5-5.6 5.0 5.2-7.0 5.9 1.6-1.8 1.7
95 2.1-2.4 2.2 4.1-5.4 4.6 3.9-5.0 4.3 4.4-6.1 5.0 1.5-1.7 1.6
105 2.0-2.2 2.1 3.5-4.8 4.0 3.3-4.5 3.8 3.7-5.2 4.3 1.4-1.6 1.5
115 1.8-2.1 2.0 3.0-4.2 3.4 2.9-4.0 3.3 3.1-4.5 3.6 1.4-1.5 1.4
125 1.7-2.0 1.8 2.5-3.7 3.0 2.5-3.5 2.9 2.6-3.9 3.1 1.3-1.5 1.4
135 1.6-1.9 1.7 2.2-3.2 2.6 2.2-3.1 2.5 2.2-3.4 2.7 1.3-1.4 1.3
Table 3 — R-Values For 8 in. (203 mm) Concrete Masonry Walls, hr . ft 2.o F/Btu a
Cores filled with:
Density of
concrete
Cores empty
Perlite
Loose-fill insulation
Vermiculite
Polyurethane
foamed insulation
Solid grouted
Construction
Exposed
block, both
sides
pcf range mid range mid range mid range mid range mid
85 2.4-2.7 2.5 6.3-8.2 7.1 5.9-7.5 6.6 6.9-9.4 8.0 1.9-2.1 2.0
95 2.3-2.6 2.4 5.3-7.2 6.1 5.0-6.7 5.7 5.8-8.1 6.7 1.7-2.0 1.8
105 2.1-2.4 2.2 4.5-6.3 5.2 4.3-5.9 4.9 4.8-7.0 5.6 1.6-1.9 1.7
115 2.0-2.3 2.1 3.8-5.5 4.4 3.7-5.2 4.3 4.0-6.0 4.7 1.5-1.8 1.6
125 1.9-2.2 2.0 3.2-4.8 3.8 3.1-4.6 3.7 3.3-5.1 4.0 1.5-1.7 1.5
135 1.7-2.1 1.9 2.7-4.2 3.3 2.7-4.0 3.2 2.8-4.4 3.4 1.4-1.6 1.5
w w w. t r e n w y t h . c o m
T S 2

architectural masonry units
R-Values
Trendstone ®
Trendstone Plus ®
Table 4 — R-Values For 10 in. (254 mm) Concrete Masonry Walls, hr . ft 2.o F/Btu a
Cores filled with:
Density of
concrete
Cores empty
Perlite
Loose-fill insulation
Vermiculite
Polyurethane
foamed insulation
Solid grouted
Construction
Exposed
block, both
sides
pcf range mid range mid range mid range mid range mid
85 2.5-2.9 2.7 7.5-9.9 8.5 7.0-9.1 7.9 8.2-11.3 9.5 2.1-2.4 2.2
95 2.4-2.7 2.5 6.3-8.7 7.2 6.0-8.0 6.8 6.7-9.7 7.9 1.9-2.2 2.0
105 2.2-2.5 2.3 5.2-7.5 6.1 5.0-7.0 5.8 5.5-8.2 6.6 1.8-2.1 1.9
115 2.1-2.4 2.2 4.4-6.5 5.2 4.2-6.2 5.0 4.6-7.0 5.5 1.7-2.0 1.8
125 1.9-2.3 2.1 3.7-5.6 4.4 3.6-5.4 4.3 3.8-6.0 4.6 1.6-1.9 1.7
135 1.8-2.1 2.0 3.1-4.9 3.7 3.0-4.7 3.6 3.2-5.1 3.9 1.5-1.8 1.6
Table 5 — R-Values For 12 in. (305 mm) Concrete Masonry Walls, hr . ft 2.o F/Btu a
Cores filled with:
Density of
concrete
Cores empty
Perlite
Loose-fill insulation
Vermiculite
Polyurethane
foamed insulation
Solid grouted
Construction
Exposed
block, both
sides
pcf range mid range mid range mid range mid range mid
85 2.6-3.0 2.8 9.1-12.1 10.3 8.5-11.0 9.6 10.0-13.8 11.5 2.3-2.6 2.4
95 2.4-2.8 2.6 7.6-10.5 8.8 7.2-9.7 8.2 8.2-11.8 9.6 2.1-2.4 2.3
105 2.3-2.6 2.4 6.3-9.1 7.4 6.0-8.5 7.0 6.7-10.0 8.0 2.0-2.3 2.1
115 2.1-2.5 2.3 5.2-7.9 6.2 5.1-7.4 6.0 5.5-8.5 6.6 1.9-2.2 2.0
125 2.0-2.3 2.2 4.4-6.8 5.3 4.2-6.5 5.1 4.5-7.2 5.5 1.8-2.0 1.9
135 1.9-2.2 2.0 3.6-5.8 4.4 3.6-5.6 4.3 3.7-6.1 4.6 1.7-1.9 1.8
Information based on data published by the National Concrete Masonry Association. See NCMA TEK Note
6-2A, available at www.trenwyth.com.
w w w. t r e n w y t h . c o m
T S 3

architectural masonry units
R-Values
Trendstone ®
Trendstone Plus ®
Additional r-values can be achieved with factoryinstalled
expanded polystyrene, such as Korfil or
ICON inserts.
Korfil ® Block Insulation inserts are individually
molded expanded polystyrene inserts. Installed at
your Trenwyth manufacturing facility, Korfil insulation
inserts are designed to fit standard two-core
masonry units. Korfil inserts are available in 6", 8",
10" and 12" widths.
R-Values
Both Korfil and ICON inserts offer your building the
following benefits:
• One-step installation of insulated masonry block
saves time and money.
• R-value unaffected by moisture or aging
• Insulated block offers up to a 4-hour fire rating
• Improves dew point and sound transmission
resistance
• Offers space for easy installation of utilities
within wall
• Flame retardant polystyrene
• Use with single-wythe and cavity
wall construction
• No maintenance required
• Available in 6", 8", 10" and 12" widths.
Caution: Expanded Korfil polystyrene should not be
exposed to temperatures exceeding 184ºF.
Applicable Standards:
• ASTM C578 Specification for Rigid Cellular
Polystyrene Thermal Insulation
• ASTM C90 Standard Specification for
Loadbearing Concrete Masonry Units
ICON ® Universal Concrete Block Insulation
Inserts are molded from expandable polystyrene.
Pre-fit at your Trenwyth manufacturing facility, ICON
inserts are designed to compress and fit the core of
all masonry units and significantly improve cmu
thermal efficiency.
w w w. t r e n w y t h . c o m
T S 4

architectural masonry units
R-Values
Trendstone ®
Trendstone Plus ®
6" Two-Core Masonry Unit
Density of
Cores Empty Cores Insulated
Block - lbs/ft 9 R t U R t U
80 2.64 .38 6.45 .16
95 2.42 .41 5.39 .19
105 2.29 .44 4.76 .21
115 2.17 .46 4.21 .24
125 2.05 .49 3.69 .27
135 1.95 .51 3.25 .31
12" Two-Core Masonry Unit
Density of
Cores Empty Cores Insulated
Block - lbs/ft 9 R t U R t U
80 3.12 .32 9.38 .11
95 2.83 .35 8.09 .12
105 2.66 .38 7.27 .14
115 2.52 .40 6.51 .15
125 2.38 .42 5.78 .17
135 2.26 .44 5.11 .20
8" Two-Core Masonry Unit
Density of
Cores Empty Cores Insulated
Block - lbs/ft 9 R t U R t U
80 2.86 .35 7.74 .13
95 2.61 .38 6.55 .15
105 2.46 .41 5.83 .17
115 2.33 .43 5.17 .19
125 2.21 .45 4.56 .22
135 2.10 .48 4.01 .25
12" Cavity Wall, 4" Outer Wythe,
3/4 Air Space, 8" Two-Core Block
Density of
Cores Empty Cores Insulated
Block - lbs/ft 9 R t U R t U
80 4.26 .23 9.14 .11
95 4.01 .25 7.95 .13
105 3.86 .26 7.23 .14
115 3.73 .27 6.57 .15
125 3.61 .28 5.96 .17
135 3.50 .29 5.41 .28
10" Two-Core Masonry Unit
Density of
Cores Empty Cores Insulated
Block - lbs/ft 9 R t U R t U
80 3.00 .33 8.52 .12
95 2.73 .37 7.25 .14
The r-values and u-values are based on
information provided by insert manufacturer,
CBIS. Values are based on ASHRAE and
NCMA publications.
For more information, contact your Trenwyth
representative or visit www.cbisinc.com.
105 2.57 .39 6.48 .15
115 2.43 .41 5.76 .17
125 2.31 .43 5.09 .20
135 2.19 .46 4.48 .22
w w w. t r e n w y t h . c o m
T S 5

architectural masonry units
ASTM Reports
Trendstone ®
Trendstone Plus ®
ASTM C90 specifies the following tests for load-bearing concrete masonry units
for TRENDSTONE and TRENDSTONE PLUS recycled ground face masonry units
Compressive Strength and
Moisture Absorbancy
A test to ensure that blocks meet
strength and moisture requirements, and
are free of cracks and other defects.
Complies
ASTM C744 specifies the following tests for TRENDSTONE PLUS
recycled filled and polished ground face masonry units
Cracking and Crazing
A test to ensure that the units are free
from cracking and/or crazing.
Complies
Adhesion
A test to determine the adhesion of the
finished facing to the block substrate.
Complies
Abrasion
A test to measure the abrasion
resistance of the finished facing.
Complies
Color Change
A test by accelerated weathering
apparatus to measure change.
Complies
w w w. t r e n w y t h . c o m
T S 6

architectural masonry units
Block Characteristics
Fire Rating
Trendstone ®
Trendstone Plus ®
Fire resistance ratings can be calculated using a method that multiplies the percent of solid material in the
concrete masonry unit by the actual thickness (in inches) of the blocks to determine the hourly rating for the
type of aggregate used. Contact your Trenwyth representative for specific fire ratings.
FIRE RESISTANCE RATINGS/MINIMUM REQUIRED EQUIVALENT INCHES
Aggregate Type in
The Concrete Masonry Unit
Fire Resistance
0.5 Hr. 0.75 Hr. 1 Hr. 1.5 Hr. 2 Hr. 3 Hr. 4 Hr.
Calcareous or siliceous gravel 2.0 in. 2.4 in. 2.8 in. 3.6 in. 4.2 in. 5.3 in. 6.2 in.
Limestone, cinders or slag 1.9 in. 2.3 in. 2.7 in. 3.4 in. 4.0 in. 5.0 in. 5.9 in.
Expanded clay, shale or slate 1.8 in. 2.2 in. 2.6 in. 3.3 in. 3.6 in. 4.4 in. 5.1 in.
Expanded slag or pumice 1.5 in. 1.9 in. 2.1 in. 2.7 in. 3.2 in. 4.0 in. 4.7 in.
Calculating "Equivalent Thickness" is simply determining what the block thickness would be if the same
amount of material contained in a hollow unit were re-molded without core holes.
Nominal Width
(Inches)
EQUIVALENT THICKNESS OF CONCRETE MASONRY UNITS (IN INCHES)
Based on Typical
Hollow Units (1)
Equivalent Thickness
Based on Percent Solid
(75% - semi-solid) (100% - solid)
4 2.68 (73.8%) 2.72 3.625
6 3.09 (55.0%) 4.22 5.625
8 4.04 (53.0%) 5.72 7.625
10 4.98 (51.7%) 7.22 9.625
12 5.77 (49.6%) 8.72 11.625
CALCULATING ESTIMATED FIRE RESISTANCE EXAMPLE
An 8" hollow masonry wall is constructed of expanded slag units reported to be 53%* solid. What is the
estimated fire resistance of the wall (modular units)?
Equivalent Thickness = % solid x depth
Example: .53 x 7.625 in. = 4.04 inches
From Table: 3 hr. Fire Resistance requires 4.0 inches
*Percentage solid can be calculated from net area or net volume as determined by ASTM C140
“Methods of Testing Concrete Masonry Units”.
(1) Information based on data published by the National Concrete Masonry Association in NCMA TEK 7-1A,
available at www.trenwyth.com.
w w w. t r e n w y t h . c o m
T S 7

architectural masonry units
Installation
Trendstone ®
Trendstone Plus ®
IMPORTANT! Before You Begin
Manufacturer requires that you order a full size
unit to illustrate color and texture for approval.
Manufacturer also requires a sample panel be
installed at the jobsite prior to installation of any
Trenwyth products. This panel will represent the
quality, color and texture of the product and the
workmanship to be expected for the project. Either
the owner or the project architect must approve the
panel. Failure to produce a sample panel may result
in loss of warranty. Manufacturer will provide 4" units
for a 4' x 4' sample panel at no cost for the material
(excluding freight to site).
Delivery, Storage and Handling
Trendstone and Trendstone Plus masonry units
shall be delivered to the jobsite on covered banded
pallets with cardboard between the layers. Store
pallets in single stacks on level ground and cover
with waterproof covering (e.g., tarpaulins) to protect
the blocks from inclement weather. Handle blocks
carefully to avoid breakage and damage to the
finished surface.
Project Site Conditions
Protection of Work: Cover walls, including open
tops, each day after installation to keep open walls
protected and dry. After units are installed, they
should be protected from damage by other trades
performing operations that can stain or otherwise
damage the finished surfaces by covering walls with
plastic. Corners should be protected from damage
after installation by covering them with plywood.
Do not, under any circumstance, install a damaged
unit that does not conform to the requirements of
ASTM C90. If units have been damaged during
transit, contact manufacturer immediately.
Laying Masonry Walls
Draw blocks from more than one pallet at a time
during installation. All exterior mortar shall include
manufacturer-approved matching water repellent
additive added to each batch in the appropriate
dosage rates for mortar type (M, S or N) per
manufacturer’s instructions. Refer to NCMA TEK
Notes, available at www.trenwyth.com, for Hot
and Cold weather construction practices.
Lay units using the best concrete masonry
practices. Install only quality units; reject all
defective units as defined by ASTM C90. Lay
blocks with the faces level, plumb and true to the
line strung horizontally at the ground face. Units
shall have uniform, 3/8"-wide joints both horizontally
and vertically on the finished side of the wall. Tool
joints neatly after they are finger-hard to make
them straight and uniform. Size and place cut
pieces appropriately to maintain consistency and
bond. Complete masonry construction using
procedures and workmanship consistent with the
best masonry practices.
Lighting: Provide adequate lighting for masonry
work by placing all lighting at a reasonable distance
from the wall for even illumination. Do not use
trough lighting.
Cutting: Make all unit cuts, including those for
bonding, holes, boxes, etc., with motor driven
masonry saws, using either an abrasive or diamond
blade. Cut neatly and locate for best appearance.
Mortar Bedding and Jointing:
1. Lay units with full mortar coverage on head and
bed joints taking care not to block cores to be
grouted or filled with masonry insulation.
2. Tool all mortar joints when thumbprint hard into a
concave configuration.
3. Care should be taken to remove mortar from the
face of masonry units before it sets.
4. Tuckpoint the joints of scored units for proper
appearance. All exterior scored units must be
tuckpointed to prevent water penetration. NO
RAKE JOINTS.
Flashing of Masonry Work
Install flashing at locations shown in the plans and
in strict accordance with the details and the best
masonry flashing practices.
Weep Holes and Vents
Install weep holes and vents at proper intervals at
courses above grade and at any water stops over
windows, doors and beams. Consult NCMA TEK
Notes, available at www.trenwyth.com, for proper
flashing and drawings.
w w w. t r e n w y t h . c o m
T S 8

architectural masonry units
Installation
Trendstone ®
Trendstone Plus ®
Inspection
The ground faces shall conform to the requirements
of ASTM C90 when viewed from a distance of
twenty (20) feet at right angles to the wall with
normal lighting.
Installation Recommendations
• Consult NCMA TEK Notes, available at
www.trenwyth.com, for proper installation of
concrete masonry units.
• A complementary or matching mortar color is
recommended when using Trendstone and
Trendstone Plus units. Call customer service
800-233-1924 to receive a Trenwyth Mortar Kit.
Limitations
• The Trendstone and Trendstone Plus facing is not
intended for use as an impervious surface.
• Acid solutions/HCL acid-based cleaners should
not be used as a cleaning agent or come in direct
contact with the facing.
• Trendstone and Trendstone Plus facings should
not be continuously exposed to temperatures
above 250º F.
w w w. t r e n w y t h . c o m
T S 9

architectural masonry units
Cleaning
Trendstone ®
Trendstone Plus ®
Walls must be cleaned on a daily basis as
block laying proceeds.
Masonry surfaces clean most effectively if the
cleaning is done within 14-28 days after masonry
installation. Mortar and grout smears that remain on
the surface for a longer time result in a more difficult
cleandown and may cause undesirable results.
Final cleandown of masonry surfaces should be
completed before installation of windows, doors,
hardware, light fixtures, roofing materials and any
other non-masonry item that may be damaged by
the cleaning product. If such fixtures have been
installed, they must be protected before the cleaner
is applied. All caulking and sealant materials
should be in place and thoroughly cured before
cleaning begins.
Protect all surrounding metal and non-masonry
materials, painted surfaces and plant life from
contact with the cleaner, residue or fumes.
Masonry Cleaners
Use Burnished Custom Masonry Cleaner by
PROSOCO following manufacturer’s instructions
(dilute one part to 3 parts clean water). Available
from manufacturer. Do not powerwash.
CAUTION! Never use muriatic acid on units.
Prior to overall application, always test the cleaner
(minimum 4' x 4' area) to ensure suitability and
desired results. Test each type of masonry and each
type of stain. Allow test area to dry for 3 – 7 days
before inspection and approval by the project
architect or building owner. Clean test areas
according to the application below and always
make the test panel available throughout the
cleaning project.
• Always pour cold water into an empty bucket first
before carefully adding detergent.
• Never use hot water.
• Handle in polyethylene or rubber buckets only.
• Acidic materials and fumes will attack metal.
Exterior Test Application
The following cleaning procedure is recommended
unless otherwise indicated during testing:
1. Thoroughly saturate a large portion of the
masonry surface with clean water.
2. Using a densely-packed, soft-fibered masonry
washing brush or low-pressure spray (50 psi
maximum), apply diluted solution freely. (Do not
apply Burnished Custom Masonry Cleaner with
pressure spray above 50 psi. Such an application
will drive the chemicals deep into the surfaces
making it more difficult to rinse completely.)
3. Depending on the absorption rate of masonry
and drying conditions, allow cleaning solution to
remain on the wall for approximately five (5)
minutes. Do not allow cleaner to dry into the
masonry because it may leave a residue and
cause staining.
General
• Keep walls clean by using brushes or rags and
the burlap squares supplied on the Trendstone
and Trendstone Plus pallets.
• Do not allow excess mortar lumps or smears to
harden on the finished surfaces.
• Remove green mortar with burlap or a dry cloth.
• Wipe masonry blocks clean with burlap
(provided with every other cube) as the blocks
are laid each day.
• Protect stored materials and the wall prior to
completion to prevent excessive water entry and
external soiling.
• Protect the exposed portions of metal fixtures.
(Harsh cleaning methods after walls have been
erected may mar the surface of the blocks.)
• Protect adjacent masonry and floor area by
saturating with water and flushing away any
cleaning solution before it dries.
w w w. t r e n w y t h . c o m
T S 1 0

architectural masonry units
Cleaning
Trendstone ®
Trendstone Plus ®
Materials
• Two plastic or hard rubber buckets
• Rubber gloves
• Soft fiber masonry brushes (or whitewash brushes)
• Wooden, plastic or other soft, non-staining
scraping device
• Supply of “clean” wipers, such as lint-free cloths
or paper towels
• Clean water
• Burnished Custom Masonry Cleaner (dilute one
part to 3 parts of clean water). Do not apply
Burnished Custom Masonry Cleaner with pressure
spray above 50 psi. It will cause efflorescence.
DO NOT USE ACID OR CLEANER WITH
HCL BASE.
Cleaning Procedure 1
1. Brush clean water liberally on the surface area to
be cleaned. Brush approximately one square yard
at a time.
2. It is important that the masonry wall be kept wet
at all times. Do not use dirty water.
3. Apply cleaning solution brushing in a circular
motion to remove any unwanted mortar smears.
4. Remove excess lumps of mortar with the soft
(wood or plastic) scraping device and re-apply
cleaning solution.
5. Allow cleaning solution to remain on the surface
for two or three minutes then wash off with liberal
amounts of fresh, clean water.
6. Wipe the walls down completely dry with clean,
dry wipers.
Cleaning Procedure 2
If liberal amounts of water cannot be used, an
alternative procedure may be employed.
1. Soak a clean wiper in the cleaning solution. Wring
it out so it is wet enough to dampen the surface,
but dry enough so that the solution will not run
down the wall.
2. Allow the solution to remain on the surface for
two or three minutes. Remove excess lumps of
mortar with the soft scraping device and repeat
Step #1.
3. Wipe the wall completely dry with clean,
dry wipers.
Note: To remove mortar smears that have been
allowed to harden on the wall and cannot be
removed by following the procedures listed above,
a solution of Burnished Custom Masonry Cleaner
by PROSOCO may be used with a dilution ratio of
1 part cleaner to 3 parts clean water, strictly
following manufacturer’s instructions.
WARNING! Never use muriatic acid solutions on
Trendstone or Trendstone Plus units.
Final Cleandown
Clean the completed walls with a detergent
masonry cleaner strictly following the manufacturer's
instructions including thorough rinsing. Do not
use acid or abrasives on the block surfaces. For
stubborn mortar stains or smears, a 3:1 solution
of Burnished Custom Masonry Cleaner by
PROSOCO may be used as long as the walls are
thoroughly wetted with clean water before applying
the cleaning solution and thoroughly rinsed with
clean water immediately after washing. Failure to
strictly follow manufacturer’s instructions can result
in permanent damage to the finished faces. DO
NOT POWERWASH .
w w w. t r e n w y t h . c o m
T S 1 1

architectural masonry units
Cleaning
Trendstone ®
Trendstone Plus ®
Maintenance
Trendstone and Trendstone Plus units, properly
installed and cleaned, need virtually no
maintenance other than routine cleaning with
standard commercial grade cleaning agents such
as PINESOL ® or FANTASTIK ® . Graffiti, paint or
dye may need special cleaning methods and
products such as Trenwyth Graffiti Wizard ®
environmentally friendly cleaner. Contact
manufacturer for specific cleaning
recommendations. DO NOT POWERWASH .
Field Coat Application
For required field coat application instructions, see
Pages TS 13 – 14.
Graffiti Removal Recommendation
Graffiti Wizard environmentally friendly cleaner
removes most paints and permanent markers,
varnish, glue, crayon, oil, grease, food spills, etc.
from Trendstone Plus surfaces. Apply Graffiti Wizard
using a brush or cloth. Let stand 10 second to 20
minutes, depending on the severity of the stain. If
using on a more porous or textured surface, a nonmetallic
stiff bristle brush may be required. Wipe the
surface with a damp cloth. After the stain is
removed, neutralize the surface with water making
sure that all of the Graffiti Wizard is removed from
the surface. Graffiti Wizard is available in 4-oz.,
12-oz., 1 gallon and 5 gallon containers. To order,
call (800) 233-1924 and ask for the Sample
Department. Always follow manufacturer’s safety
precautions. (See Graffiti Wizard ® Literature,
TR2810, behind General Information tab.)
w w w. t r e n w y t h . c o m
T S 1 2

architectural masonry units
Field Coat Application
Trendstone ®
Trendstone Plus ®
For completely finished walls, a finish coat of
proprietary TRENDCOAT ® acrylic (minimum 20%
solids content) or TRENDCOAT ® WB (water-based)
is recommended. Apply to all Trendstone e and
Trendstone e Plus walls after cleandown and when
the walls are completely dry. Apply the acrylic evenly
to cover the entire surface without forming drips or
runs. For maximum coverage and best appearance,
apply TRENDCOAT or TRENDCOAT WB with airless
spray equipment.
TRENDCOAT clear, high-solids acrylic offers
excellent graffiti resistance, provides moisture
resistance and helps to cover any scuffs or
scratches that may occur during handling
and/or installation.
TRENDCOAT WB (water-based) may be used in
lieu of TRENDCOAT. Some interior applications
may require a water-based coating material only.
TRENDCOAT WB provides the same benefits as
TRENDCOAT but may not provide the rich gloss
achieved by using TRENDCOAT.
Always produce a sample area of the TRENDCOAT
or TRENDCOAT WB finish for architect/owner
approval prior to applying the finish coat to the
entire surface.
Product Description
High-solids TRENDCOAT and water-based
TRENDCOAT WB are high quality, non-yellowing
sealers specifically formulated for field coating
Trendstone and Trendstone Plus masonry units. The
sealers offer outstanding durability that beautifies the
natural color of the Trendstone and Trendstone Plus
ground and polished surfaces.
Application
Apply TRENDCOAT or TRENDCOAT WB to all
Trendstone and Trendstone Plus walls after
cleandown. TRENDCOAT and TRENDCOAT WB are
ready to use and requires no mixing or dilution.
Apply TRENDCOAT to clean, dry walls when the
temperature is above 55º F. It should not be applied
at temperatures lower than 55º F. All washdown
activities for removal of mortar paste must be
completed. TRENDCOAT and TRENDCOAT WB
are sprayable with an airless sprayer or it can be
applied using a brush, roller or long nap applicator.
TRENDCOAT and TRENDCOAT WB shall be applied
evenly to cover thentire surface without forming
drips or runs.
• Keep container tightly closed when not in use.
• New mortar or adjacent concrete must cure for a
minimum of 7 days before application.
• The best results are obtained using airless spray
paint equipment. The surface must be completely
covered to seal out water.
• Clean tools with Xylene immediately after use.
Application Precaution
TRENDCOAT is flammable. Use only in wellventilated
or open areas. Keep away from extreme
heat or open flame. Avoid breathing vapors,
prolonged and repeated contact with skin and
contact with eyes.
Advantage
TRENDCOAT and TRENDCOAT WB provide
maximum protection from the damaging effects of
air pollution, sun and extreme weather conditions.
It covers and seals scuffs, scratches and small
chips that may occur in the Trendstone and
Trendstone Plus surface during installation and seals
the faces and the joints. Because it is the same
basic coating material which is used in the factory, it
is completely compatible with the Trendstone and
Trendstone Plus finishes.
w w w. t r e n w y t h . c o m
T S 1 3

architectural masonry units
Field Coat Application
Trendstone ®
Trendstone Plus ®
Technical Information
TRENDCOAT ® :
Coverage: 265 sq ft/gal @ 1.0 dry mil. Suggested
mils applied should not exceed 5.0 wet mils to
achieve block protection and cosmetics.
Flash Point: 3º F
Normal Cure Time: @ 70º F – 50% RH:
10 minutes
Solids Content: 16.5%
Weight solids: 20%
VOC: 357.88 grams/liter solids
Environmentally compliant in most states.
Low HAPS: below 1%
Weight per Gallon: 7.49 lbs./gal
Gloss: Full
TRENDCOAT ® WB:
Coverage: 563 sq ft/gal @ 1.0 dry mil. Suggested
mils applied should not exceed 5.0 wet mils to
achieve block protection and cosmetics.
Flash Point: 212º F
Normal Cure Time: @ 5-7 days for complete cure.
Dry to the touch in 10 to 15 minutes.
Solids Content: 35%
Weight solids: 38%
VOC:
151.85 grams/liter (minus water)
175.54 grams/liter (solids)
Environmentally compliant in most states.
HAPS-free
Weight per Gallon: 8.71 lbs./gal
Gloss: Full
Flammability: TRENDCOAT WB is not flammable.
w w w. t r e n w y t h . c o m
T S 1 4

architectural masonry units
Shapes & Sizes
Coding System
Trendstone ®
Trendstone Plus ®
Shapes and Sizes Coding System
All units are nominal 8" and 16" lengths unless
modified by symbols as noted below. In some
instances, only the first two (2) symbols will be used.
Other symbols are added as required.
The coding system is based on a series of symbols
that define the size, general type and variance from
standard length and return.
1. The 1st part is the number denoting the
nominal thickness:
1", 2", 4", 6", 8", 10" and 12"
2. The 2nd part is the letter or combination of letters
denoting the general type of unit.
F = 1 Face Ground
FF = 2 Faces Ground
E = End Ground
EE = 2 Ends Ground
V = Vertical Score
H = Horizontal Score
BN = Bull Nose
T = Top Ground
B = Bottom Ground
C = Chamfer Ground
U = Bond Beam (specify open
or solid bottom)
3. The 3rd part is a number denoting length of the
unit varying from the standard 16" length.
Example: 4FF8 is a 4" thick, 8" long with 2
ground faces.
4. The 4th part is a letter denoting the hand of the
appropriate return unit.
R = Right Hand L = Left Hand
5. SPECIAL NOTE: For unit heights varying
from the nominal 8", the numeral denoting
height immediately follows the numeral
denoting thickness.
Example: 64FEBN is a nominal
6" thick, 4" high face ground,
end ground, bullnose unit.
6. DA# denotes the scoring pattern.
(See Page TS 17)
w w w. t r e n w y t h . c o m
T S 1 5

architectural masonry units
Shapes & Sizes
Trendstone ®
Trendstone Plus ®
Note: Not all sizes are shown in this brochure. Please consult your nearest manufacturing facility.
Metric shapes and sizes are available.
2F
7 5/8"
4FT
7 9 /16"
4FE
7 5/8"
4F
7 5/8"
6F
8F
15 5/8"
3 9 /16"
15 5 /8"
15 9/16"
Also available in 6, 8,
Available in hollow,
10 & 12” thicknesses. semi-solid or solid units.
44F
8FE
8FEBN
10F
1 9/16"
3 9/16"
3 9/16"
15 5/8"
3 5 /8"
75/8"
5 9/16" 155/8"
8FT
7 9/16"
8FETR*
75/8"
155/8"
7 9/16"
7 9/16" 3 9/16"
Also available in 8" thickness.
8F8 Solid
8F8 Hollow
7 9/16"
15 9/16" 7 5/8"
15 5/8"
7 5/8"
7 5/8"
7 9/16"
Also available in 2, 4,
6, 10 & 12” thicknesses.
7 9/16"
Also available in 4, 6,
10 & 12" thicknesses.
8FTBN 4 FE 135º
7 9/16"
15 9/16"
7 5/8"
7 5/8"
7 5/8"
"
4 FE L CORNER
7 9/16"
9 9/16"
KOBB
(Open Bottom)
7 9 /16"
15 5 /8"
15 5/8"
15 9/16"
Also available in 6,
10 & 12” thicknesses.
7 5/8"
Also available in 12” thickness.
3 9/16"
7 5/8"
7 5 /8"
Open Ended Bond Beams (Available from the Phoenix, AZ facility only.)
OE1E
DCBB OE2E
DCBB OE1E
3 9 /16"
15 5 /8"
Also available in 2, 6, 8, 10
& 12” thicknesses.
8UF (v-block)
7 9/16"
FHA
(KOBB with
Solid Bottom)
7 9 /16"
15 5/8"
15 5 /8"
7 5/8"
7 5 /8"
Also available in 6,
10 & 12” thicknesses.
79/16"
155/8"
79/16"
7 9/16"
code designations
F = 1 Face Ground
FF = 2 Faces Ground
E = End Ground
EE = 2 Ends Ground
V = Vertical Score
H = Horizontal Score
BN = Bull Nose
T = Top Ground
B = Bottom Ground
C = Chamfer Ground
U = Bond Beam
15 9/16" 7 9/16"
Also available in 2, 4
& 6" thicknesses.
*Specify right or left (right shown)
All Trenwyth concrete masonry
units are manufactured with
an integral moisture resistant
admixture to repel moisture and
prevent mold and efflorescence.
7 5 /8"
7 5 /8"
7 5 /8"
7 5 /8"
15 5 /8"
7 5 /8"
15 5 /8"
7 5 /8"
15 5 /8"
Also available in 4, 6, 10 & 12" thickness.
Chamfered corners minimize chipping and eliminate sharp corners. Not all chamfer designations are shown.
Any side can be chamfered.
8FE C1
8FT C2 8FET * C4
8FFE C5
chamfers
8FEE C11
1"
Trendstone ® /Acousta-Wal ® units
Control noise pollution in your Type IV
project with Trendstone ® /
Acousta-Wal ® units.
*Specify right or left (right shown)
For more information refer
to the Acousta-Wal ® section.
w w w. t r e n w y t h . c o m
T S 1 6

architectural masonry units
Scoring Patterns
Trendstone ®
Trendstone Plus ®
• Score Dimensions. The width of the score is 3/8".
• Tuckpoint and scored joints. All scored joints
must be tuckpointed to prevent moisture
penetration and to match the real joints between
the blocks. This gives a more realistic, pleasing
appearance to the finished wall.
• Special scoring. Written dimensions and a sketch
are required in order to produce special scoring.
Limitations: No more than five (5) vertical scores or
two (2) horizontal scores is acceptable on the face
of a block. DO NOT USE RAKE JOINTS.
V1 V2 H1
8x8 Score 8x5 Score 4x16 Score
Design Your Own
w w w. t r e n w y t h . c o m
T S 1 7

architectural masonry units
Chamfered Edge
Coding System
Trendstone ®
Trendstone ® Plus
C1 C2 C3 C4*
C5 C6 C7 C8
Notes:
C9* C10* C11 Design your own
1) *For these units designate left L (left) or R (right). (Right shown)
2) Show Faces to be ground as: F (face), E (end), T (top), B (bottom).
3) If you need a configuration not shown simply mark up one of the "Design your own" above
and fax it to us at PA (717) 767-4023, IL (815) 416-0382 or AZ (623) 435-2088. The chamfer
designation will be CS (Chamfer Special).
4) A standard chamfer is 1" at a 45º angle. Please clearly designate any variations.
w w w. t r e n w y t h . c o m
T S 1 8

architectural masonry units
Chamfered Edge Design
Recommendations
Trendstone ®
Trendstone ® Plus
When chamfered edges are required, the following variations are available. Ony angles of 30º, 45º or 60º
may be supplied on any of the edges of Trendstone or Trendstone Plus units.
See details below:
30º 45º 60º
These three standard angles may be used on any size block and the width of the chamfer may be varied.
Typically chamfers are 1", 2", 3" or 4" wide.
Any or all edges may be chamfered.
2 Inch @ 45º
END
END
Standard Chamfer
1 Inch @ 45º
Standard Chamfer
1"
Always Designate size of chamfer when ordering.
w w w. t r e n w y t h . c o m
T S 1 9

architectural masonry units
Bullnose Edge Codes
Trendstone ®
Trendstone ® Plus
B1 B2 B3 B4*
B5 B6 B7 B8
Notes:
B9* B10* B11 Design your own
1) *For these units designate left L (left) or R (right). (Right shown)
2) Show Faces to be ground as: F (face), E (end), T (top), B (bottom).
3) If you need a configuration not shown, simply mark up one of the "Design your own" above
and fax it to us at PA (717) 767-4023, IL (815) 416-0382 or AZ (623) 435-2088. The bullnose
designation will be BNS (Bullnose Special).
4) You may be required to produce architectural drawings prior to production. All drawings for special
units require approve with authorized signatures.
w w w. t r e n w y t h . c o m
T S 2 0

architectural masonry units
Frequently Asked
Questions
Trendstone ®
Trendstone Plus ®
1. How is the product made? What is the difference between Trendstone and Trendstone Plus?
Trendstone ground face masonry units are integrally colored concrete blocks with one or more faces
ground to expose the variegated colors of the natural aggregates. A special additive is included in the
concrete mix design to prevent efflorescence. A factory-applied, clear satin gloss acrylic accentuates
and highlights each burnished face and provides moisture resistance.
Trendstone Plus filled and polished masonry units offer a smooth terrazzo look on one or more of the
faces. After the initial grinding process to expose the variegated colors of the natural aggregates, the
pores and interstices are filled with a cementitious grout. The exposed faces are then polished smooth
in a multi-stage polishing process and a factory-applied clear satin gloss acrylic or water-based sealer
is applied to accentuate the natural beauty of the aggregates and provide moisture resistance.
2. Is the color on the surface or all through the block?
The color is integral, i.e. it is uniform throughout the concrete block.
3. Why is the color different depending on which plant makes the blocks?
The aggregates used to make the blocks at each plant come from different sources and are, therefore,
of different colors and particle shapes. This changes the color and appearance of the finished products.
4. How can I be sure it will not be chipped and scuffed in shipment and jobsite handling?
Trenwyth products are manufactured, packaged and shipped with great care to protect the finished
surfaces. The units are placed on sturdy wooden pallets and a layer of heavy cardboard is placed
between each layer of blocks. The entire cube is then covered with a heavy gauge plastic bag and
strapped with steel banding. Trendstone and Trendstone Plus units should be handled as finished
material on the jobsite to avoid scuffing, chipping or other damage.
5. Can I grind these blocks at the jobsite?
No. Precision equipment is needed to grind and polish Trendstone and Trendstone Plus units and this
can only be done satisfactorily in the factory.
6. Can any mason install this product?
Any mason can install this product. Masons experienced in laying architectural blocks who are good
craftsmen can lay ground face blocks very well. Unfortunately, no matter how well our blocks are
manufactured, if they are not laid well, the appearance of the project is diminished.
7. What is the difference between lightweight, medium-weight and normal-weight blocks?
ASTM C90 specification for load-bearing concrete masonry units defines lightweight as concrete less
than 105 lbs per cu. ft., mediumweight as concrete between 105 and 125 Ibs per cu. ft. and
normalweight as concrete of 125 lbs per cu. ft. or more.
The aggregate used to make lightweight blocks is usually expanded shale, expanded clay, pumice or
some similar type of open-cell material. By its nature such aggregate is porous and will allow some
moisture penetration. ASTM C90 sets the maximum rate of absorption at 18 lbs per cu. ft. for
lightweight, 15 lbs per cu. ft. for mediumweight and 13 lbs per cu. ft. for normalweight. Most
Trendstone and Trendstone Plus units are medium-weight.
w w w. t r e n w y t h . c o m
T S 2 1

architectural masonry units
Frequently Asked
Questions
Trendstone ®
Trendstone Plus ®
8. What is the surface coating?
A clear high solids acrylic coating (TRENDCOAT) or a water-based coating (TRENDCOAT WB) is applied
in the factory after the blocks are ground and polished. It is completely light stable and will not
deteriorate with exterior exposure and weathering.
9. Why do you recommend walls have a field coat? Is the field coating necessary?
The factory-applied coating is designed primarily to protect the Trendstone and Trendstone Plus surface
during shipment and installation. The field coat covers and enhances the entire wall including the mortar
joints and it hides most scuffs, scratches and nicks that occur during handling and installation. We
recommend field coating because it puts the finishing touch to the installation and brings out the full
beauty of Trendstone and Trendstone Plus units.
10 What is the life expectancy of the product?
50 years plus — if the building is properly designed and the Trendstone and Trendstone Plus units are
installed correctly.
11. At what temperature should the TRENDCOAT ® and TRENDCOAT WB field coating be applied
or not applied?
The TRENDCOAT ® and TRENDCOAT WB coating should be applied to dry walls when the temperature
is above 55° F. It should not be applied at temperatures lower than 55° F.
12. Will the TRENDCOAT ® coating peel, fade, crack or spall?
TRENDCOAT ® and TRENDCOAT WB are high quality sealers and will not peel, fade, crack or spall when
properly applied to a dry surface. However, if the walls are not properly designed or constructed with
appropriate flashing, weeps, vents, etc., and the substrate block is continuously saturated behind the
acrylic, deterioration may occur over time.
13. Can you control the color consistency?
Great care is taken in the Trendstone and Trendstone Plus manufacturing processes to ensure a high
degree of color consistency. This includes checking incoming raw materials, use of computer controlled
precision automatic color injection equipment, and precise control of the moisture and curing process.
As with any natural product, there are minor color variations from block to block. Final inspection
includes dry stacking samples drawn from the production line every half hour and comparing those
samples to the master sample for that project. Always request a jobsite field panel to be erected to
show the expected unit and mortar color.
14. Can you match colors?
Yes, within the limitations of the aggregates available at each of our plants.
15. If I want to put on an addition a year or more after the original installation of Trendstone
blocks, will the new Trendstone blocks match the old?
We can usually match previously manufactured colors quite well. However, we recommend that,
if possible, a small piece be cut or chipped from the existing wall and sent to us. If that is not possible,
a new sample of the color should be visually compared to the existing wall and adjustments made to
the color if necessary. Aggregates are a product of “Mother Nature”, however, and can vary over time.
Always order a current full size sample to verify color.
w w w. t r e n w y t h . c o m
T S 2 2

architectural masonry units
Frequently Asked
Questions
Trendstone ®
Trendstone Plus ®
16. What special precautions should be taken in the handling, storage and installation
of the product?
Refer to the Trendstone and Trendstone Plus Installation & Cleaning sections behind this tab.
17. Can Trendstone and Trendstone Plus units be used in flooring or paving?
No. Trendstone and Trendstone Plus units are designed as wall material and are not suitable for flooring
or paving.
18. How does one patch this product? Can chips in the wall be repaired?
Damaged or chipped units that do not meet requirements of ASTM C90 for the block should not be
installed. If units incur damage during installation or by other trades, a patch kit can be ordered from
manufacturer. Follow manufacturer’s instructions for best results.
19. Why should I pay a premium for Trendstone and Trendstone Plus units when there are so
many other less expensive ground face blocks, split-face blocks or bricks?
Trendstone and Trendstone Plus units are the highest quality ground face or burnished blocks available.
If quality and service are important to you -- you should specify and use Trendstone and Trendstone
Plus units.
20. What special shapes are available? Can you provide bullnose corners? Are they available in
larger sizes?
A large assortment of special shapes are available or can be made. We have numerous molds, jigs, etc.
-- the most in the industry. Give us a drawing or sketch of the special shapes you would like and let us
show you what we can do. We offer a chamfered corner as well as a bullnose. A full range of over-sized
units are also available. See the Monumental tab in this binder.
21. What do I use for the washdown to remove mortar and scum?
Refer to the Trendstone and Trendstone Plus Installation & Cleaning sections behind this tab.
22. What happens if acid is used on Trendstone and Trendstone Plus blocks?
Cleaners that use a harsh acid (like HCL) as a base can attack the acrylic sealer, degrading the coating
and etch the pigment in the blocks. Use only the recommended cleaner on Trenwyth products.
23. Are the blocks UL rated?
Trendstone and Trendstone Plus blocks are tested annually to Underwriter Laboratories (UL) standards
by various independent testing laboratories. Therefore, they are UL rated although they are not UL listed,
as there is no requirement that ground face blocks be UL listed in the United States.
24. Can I return blocks I do not use?
No. All Trendstone and Trendstone Plus blocks are custom made. We require a signed sales contract
before we will start manufacturing any order. Since we don’t make any blocks for stock, any Trendstone
and Trendstone Plus blocks that are ordered in excess must be shipped and cannot be returned.
25. Is the score cast or cut?
The score is cut into the finished side of Trendstone and Trendstone Plus blocks.
w w w. t r e n w y t h . c o m
T S 2 3

architectural masonry units
Frequently Asked
Questions
Trendstone ®
Trendstone Plus ®
26. Can I get the back side of the exposed, unfinished block scored to match the score on the
finished face?
Yes.
27. Do I tuckpoint the scored joint?
The scored joints must be tuckpointed to match the rest of the mortar joints. If they are not tuckpointed,
the continuity between the scored joint and the mortar joint is lost. Rake joints are not permitted on
Trendstone and Trendstone Plus.
28. Is there any special mortar required?
Colored mortar that matches or complements the Trendstone and Trendstone Plus colors can create a
beautiful effect. For more information on mortars see Mortars in the General Information section of this
binder or call your Trenwyth manufacturing facility and ask for a Trenwyth Mortar Kit. A Trenwythapproved
integral water repellent admixture is recommended for all exterior mortar.
w w w. t r e n w y t h . c o m
T S 2 4

This page intentionally left blank

Eastern Colors Selection
Trendstone ®
architectural masonry units
Note: All color samples are intended to be representative only. For accurate color selection, always request a full size sample.
Indian Summer
Eastern Group B
Butterscotch
Eastern Group C
Forest Brown
Eastern Group C
Quarry Buff
Eastern Group C
Winter White
Eastern Group C
Ravenstone
Eastern Group A
Manchester
Eastern Group A
Delmarva
Eastern Group A
Williamsburg Grey
Eastern Group A
Natural
Eastern Group A
Fawn
Eastern Group C
Rutherford Grey
Eastern Group B
Alamo
Eastern Group C
Wine
Eastern Group B
Greystone
Eastern Group B
Carson Brown
Eastern Group B
Ashland
Eastern Group C
Plum
Eastern Group C
Cambridge
Eastern Group C
Ramapo White
Eastern Group C
Colonial Red
Eastern Group C
Pembroke
Eastern Group C
Canyon Stone
Eastern Group C
Fairfield
Eastern Group C
Andover
Eastern Group A
Madison
Eastern Group B
Hawthorne
Eastern Group B
Burford Brown
Eastern Group B
Gunsmoke
Eastern Group C
Temple Grey
Eastern Group C
Dover Grey
Eastern Group B
Canterbury
Eastern Group A
Windermere
Eastern Group A
Terra Cotta
Eastern Group C
Shannon
Eastern Group D
Valley Green
Eastern Group D
Hampton Green
Eastern Group E
w w w. t r e n w y t h . c o m
T S 2 5

Midwest Colors Selection
Trendstone ®
Note: All color samples are intended to be representative only. For accurate color selection, always request a full size sample.
Burnt Sandstone
Midwest Group B
Sedalia
Midwest Group B
Saddle Tan
Midwest Group B
Goldstone
Midwest Group C
Midwest Slate
Midwest Group C
Sandstone III
Midwest Group A
Bradley
Midwest Group B
Natural MW
Midwest Group A
Elmhurst
Midwest Group A
Springfield
Midwest Group A
Sterling
Midwest Group A
Oak
Midwest Group B
Chocolate
Midwest Group C
Limestone II
Midwest Group C
Bloomington
Midwest Group B
Adobe
Midwest Group B
Colonial Red M
Midwest Group B
Red Bud
Midwest Group B
Haydite
Midwest Group C
Sequoia
Midwest Group C
Tawny
Midwest Group B
Light Brown
Midwest Group B
Ash Charcoal
Midwest Group B
Knight Gold
Midwest Group C
Gray Stone
Midwest Group B
Light Karmel
Midwest Group C
Sundown
Midwest Group C
Irving Cream
Midwest Group C
Shadow Gray
Midwest Group C
Almond Bark
Midwest Group C
Aztec Tan
Midwest Group C
Oreo Cream
Midwest Group C
Irish Cream
Midwest Group C
Midwest White
Midwest Group C
Spice
Midwest Group C
Jewelstone
Midwest Group C
Brick Red M
Midwest Group C
Gray Marble
Midwest Group C
Lincoln
Midwest Group A
County Gray
Midwest Group B
Chicago Gray
Midwest Group C
Butterfield IV
Midwest Group A
Belvidere
Midwest Group A
Morning Glory
Midwest Group B
Parchment
Midwest Group C
Rocky Road
Midwest Group B
Baton Rouge
Midwest Group C
Coral
Midwest Group C
Lasalle
Midwest Group A
Marengo
Midwest Group C
T S 2 6

West Colors Selection
Trendstone ®
architectural masonry units
Note: All color samples are intended to be representative only. For accurate color selection, always request a full size sample.
Pebble Beach
West Group A
Huntington Gray
West Group A
Black Canyon
West Group B
Red Rock
West Group B
Walnut Creek
West Group C
Black Mountain
West Group B
Newport
West Group B
Fuego Red
West Group B
San Mateo Rose
West Group B
Malibu Sand
West Group D
Riverside
West Group B
Plum
West Group B
Ballpark Buff
West Group B
Papago Red
West Group B
Showlow Sunset
West Group B
Autumn
West Group B
Beverly Spice
West Group B
Modesto
West Group C
Anthem Red
West Group B
MW Bone
West Group B
Hopi Sandstone
West Group B
Mojave Brown
West Group B
Monterey Stone
West Group B
Berkeley
West Group B
Mission White
West Group E
NEW
Seashell
West Group E
NEW
Hopi Sandstone
West Group B
NEW
Pearl
West Group D
NEW
Purple Hart
West Group C
Willow Green
West Group D
Sierra
West Group D
Durango
West Group D
Rutherford
West Group D
Southwest Gold
West Group D
w w w. t r e n w y t h . c o m
T S 2 7

architectural masonry units
Eastern Colors
Selection
Trendstone Plus ®
Note: All color samples are intended to be representative only. For accurate color selection, always request a full size sample.
Andover
Eastern Group A
Canterbury
Eastern Group A
Delmarva
Eastern Group A
Madison
Eastern Group B
Manchester
Eastern Group A
Natural
Eastern Group A
Ravenstone
Eastern Group A
Williamsburg Grey
Eastern Group A
Windermere
Eastern Group A
Alamo
Eastern Group C
Greystone
Eastern Group B
Hawthorne
Eastern Group B
Rutherford Grey
Eastern Group B
Terra Cotta
Eastern Group C
Wine
Eastern Group B
Burford Brown
Eastern Group B
Canyon Stone
Eastern Group C
Colonial Red
Eastern Group C
Plum
Eastern Group C
Dover Grey
Eastern Group B
Fairfield
Eastern Group C
Gunsmoke
Eastern Group C
Temple Grey
Eastern Group C
Ramapo White
Eastern Group C
Carson Brown
Eastern Group B
Fawn
Eastern Group C
Ashland
Eastern Group C
Cambridge
Eastern Group C
Shannon
Eastern Group D
Pembroke
Eastern Group C
Hampton Green
Eastern Group E
Valley Green
Eastern Group D
Indian Summer
Eastern Group B
Butterscotch
Eastern Group C
Forest Brown
Eastern Group C
Quarry Buff
Eastern Group C
Winter White
Eastern Group C
w w w. t r e n w y t h . c o m
T S 2 8

Midwest Colors Selection
Trendstone Plus ®
Note: All color samples are intended to be representative only. For accurate color selection, always request a full size sample.
Sandstone III
Midwest Group A
Bradley
Midwest Group B
Natural MW
Midwest Group A
Lincoln
Midwest Group A
Butterfield IV
Midwest Group A
Elmhurst
Midwest Group A
Chocolate
Midwest Group C
Limestone II
Midwest Group C
Bloomington
Midwest Group B
Adobe
Midwest Group B
Light Brown
Midwest Group B
Haydite
Midwest Group C
Colonial Red M
Midwest Group B
Oak
Midwest Group B
Tawny
Midwest Group B
County Gray
Midwest Group B
Gray Stone
Midwest Group B
Knight Gold
Midwest Group C
Almond Bark
Midwest Group C
Sundown
Midwest Group C
Shadow Gray
Midwest Group C
Ash Charcoal
Midwest Group B
Aztec Tan
Midwest Group C
Light Karmel
Midwest Group C
Irish Cream
Midwest Group C
Midwest White
Midwest Group C
Oreo Cream
Midwest Group C
Gray Marble
Midwest Group C
Brick Red M
Midwest Group C
Jewelstone
Midwest Group C
Red Bud
Midwest Group B
Spice
Midwest Group C
Parchment
Midwest Group C
Rocky Road
Midwest Group B
Belvidere
Midwest Group A
Baton Rouge
Midwest Group C
Flower
Midwest Group C
Lasalle
Midwest Group A
Marengo
Midwest Group C
Sage Brush
Midwest Group C
w w w. t r e n w y t h . c o m
T S 2 9

West Colors Selection
Trendstone Plus ®
architectural masonry units
Note: All color samples are intended to be representative only. For accurate color selection, always request a full size sample.
Walnut Creek
West Group B
Malibu Sand
West Group C
Mission White
West Group D
Seashell
West Group D
NEW
Riverside
West Group B
Modesto
West Group B
Pearl
West Group D
Purple Hart
West Group C
Willow Green
West Group D
Sierra
West Group D
NEW
NEW
NEW
Durango
West Group D
Rutherford
West Group D
Southwest Gold
West Group D
w w w. t r e n w y t h . c o m
T S 3 0

the subtlety of texture –
a natural design complement.
Verastone ® Textured
recycled masonry units
Mesastone ®
textured masonry units

04
Verastone Textured recycled masonry units and Mesastone textured masonry units are
concrete blocks made with colored aggregates and pigment, uniformly finished to an even
texture on one or more of the faces.
Verastone ® Textured and Mesastone ® advantages at a glance
Recycled Content Extracted, processed and manufactured regionally, Verastone Textured masonry units
contain a significant amount of pre-consumer recycled content that may earn LEED Green
Building Rating Points ® to your building.
One-step Installation Single trade installation of finished load-bearing or non-load-bearing
walls saves time and money.
Water Repellent Verastone Textured and Mesastone are manufactured with an integral water repellent
admixture to resist moisture absorption.
Low Maintenance Verastone Textured and Mesastone require virtually no maintenance beyond routine
cleaning. It lasts the lifetime of your building with no refinishing.
Colors, Shapes & An extraordinary color palette and a wide variety of shapes and scoring patterns are
Scoring Patterns available for maximum design flexibility.
Regional Color Options The aggregates are native to your region allowing your building to blend naturally
with your environment.
Over-sized Units Verastone Textured and Mesastone are available in Monumental over-sized units..
Availability Mesastone is manufactured nationwide to provide convenient service anywhere
in the USA. Verastone Textured is manufactured in PA and IL.
Verastone ® Textured
recycled textured masonry units
Mesastone ®
textured masonry units

architectural masonry units
Table of Contents
Verastone ® Textured
Mesastone ®
Verastone Textured and Mesastone Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . TX 1
R-Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TX 2 – 5
ASTM Reports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TX 6
Block Characteristics/Fire Ratings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TX 7
Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TX 8 – 9
Cleaning Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TX 10 – 12
Shapes & Sizes Coding System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TX 13
Shapes & Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TX 14
Scoring Patterns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TX 15
Verastone Textured Colors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TX 16
Mesastone Colors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TX 17 – 19
w w w. t r e n w y t h . c o m
T X T O C

This page intentionally left blank

Verastone Textured and
Mesastone Specifications
PART 1 – GENERAL
SUBMITTAL
Submit color samples for selection from manufacturer’s
group A, B, C, D or E. Submit product literature,
certifications, test reports and full size sample(s) of each
color specified.
QUALITY ASSURANCE
Certifications: Concrete blocks for finishing shall
conform to ASTM C90. All Trenwyth units contain
manufacturer-approved integral water-repellent CMU
admixture at the time of manufacture.
Fire Resistance: Define hourly ratings required by NCMA
TEK Notes, available at www.trenwyth.com.
Field Constructed Mock-Ups: Construct a sample panel,
no less than 4' x 4', of each color and size units to be used
in the project.
A full size unit is required to illustrate color and texture for
approval. Manufacturer requires a sample panel be
installed at the jobsite prior to installation of any Trenwyth
product. This panel will represent both the quality of the
product and the workmanship to be expected for the
project. The panel must be approved by either the owner
or architect for the project. Manufacturer will provide 4"
units for a 4' by 4' sample panel at no cost for the material
(excluding freight to site).
DELIVERY, STORAGE AND HANDLING
Verastone Textured and Mesastone units shall be delivered
to the jobsite on covered banded pallets with cardboard
between layers. Store pallets in single stacks on level
ground and cover with waterproof covering (e.g., tarpaulins)
to protect the blocks from inclement weather. Handle
blocks carefully to avoid breakage and damage to the
finished surfaces.
PROJECT/SITE CONDITIONS
Protection of Work: Cover walls each day after installation
to keep open walls protected and dry. After units are
installed they should be protected from damage by other
trades performing operations that can stain or otherwise
damage the finished surfaces by covering walls with plastic.
Corners should be protected from damage after installation
by covering them with plywood.
PART 2 – PRODUCTS
PRODUCT NAME
Verastone ® Textured recycled concrete masonry units
Mesastone ® textured concrete masonry units
MANUFACTURER
Anchor Concrete Products (800) 233-1924
One Connelly Road • Emigsville, PA 17318
Northfield Block Company (800) 358-3003
3400 E. Bungalow Road, Morris, IL 60450
Superlite Block (800) 331-9823
4626 N. 42nd Avenue • Phoenix, AZ 85019
RELATED MATERIALS
Colored matching or contrasting mortar is available from
manufacturer. Consult NCMA TEK Notes, available at
www.trenwyth.com, for mortar type and specifications. For
all exterior mortar, use matching manufacturer-approved
water-repellent mortar additive, following manufacturer’s
instructions. Consult manufacturer for recommendations.
SIZES AND SHAPES
Nominal 2", 4", 6", 8", 10" and 12" standard block
thickness are available as well as all standard block shapes.
High-strength units for special structural requirements, oversized
units, and metric shapes and sizes are also available.
MASONRY CLEANERS
Carefully following manufacturer’s instructions, use
Burnished Custom Masonry Cleaner by PROSOCO
(dilute 1 part to 3 parts clean water). Available from
manufacturer. Do not powerwash.
CAUTION! Never use Muriatic Acid solution or any cleaner
containing acid on units.
PART 3 – EXECUTION
LAYING MASONRY WALLS
Draw blocks from more than one pallet at a time during
installation. All exterior mortar shall include matching
water-repellent additive added to each batch in the
appropriate dosage rates for mortar type (M, S or N) per
manufacturer’s instructions. Refer to NCMA TEK Notes,
available at www.trenwyth.com, for Hot and Cold weather
construction practices.
Lay units using the best concrete masonry practices.
Install only quality units; reject all defective units as defined
by ASTM C90. Lay blocks with the faces level, plumb and
true to the line strung horizontally at the finished face. Units
shall have uniform, 3/8"-wide joints both horizontally and
vertically on the finished side of the wall. Tool joints neatly
after they are finger-hard to make them straight and
uniform. Size and place cut pieces appropriately to
maintain consistency and bond. Complete masonry
construction using procedures and workmanship
consistent with the best masonry practices.
INSTALLATION
Lighting: Provide adequate lighting for masonry work by
placing all lighting at a reasonable distance from the wall for
even illumination. Do not use trough lighting.
Cutting: Make all unit cuts, including those for bonding,
holes, boxes, etc., with motor-driven masonry saws, using
either an abrasive or diamond blade. Cut neatly and locate
for best appearance.
MORTAR BEDDING AND JOINTING
1. Lay units with full mortar coverage on head and bed
joints taking care not to block cores to be grouted or
filled with masonry insulation.
2. Tool all mortar joints when thumbprint hard into a
concave configuration.
3. Care should be taken to remove mortar from the face of
masonry units before it sets.
4. Tuckpoint the joints of scored units for proper
appearance. All exterior scored units must be
tuckpointed to prevent water penetration. NO
RAKE JOINTS.
FLASHING OF MASONRY WORK
Install flashing at locations shown in the plans and in
strict accordance with the details and the best masonry
flashing practices.
WEEP HOLES AND VENTS
Install weep holes and vents at proper intervals at courses
above grade and at any water stops over windows, doors
and beams. Consult NCMA TEK Notes, available at
www.trenwyth.com, for additional flashing information.
INSPECTION
The textured faces shall conform to the requirements of
ASTM C90 when viewed from a distance of twenty (20)
feet at right angles to the wall with normal lighting.
CLEANING
Keep walls clean daily during installation using brushes. Do
not allow excess mortar lumps or smears to harden on the
finished surfaces. Harsh cleaning methods after walls have
been erected may mar the surface of the blocks.
FINAL CLEANDOWN
Clean the completed walls with PROSOCO Burnished
Custom Masonry Cleaner (dilute 1 part to 3 parts clean
water), strictly following the manufacturer’s instructions —
including thorough rinsing. Do not use acid or abrasives on
the finished surfaces. Failure to strictly follow manufacturer’s
instructions can result in permanent damage to the finished
faces. Do not powerwash.
High-pressure power washing may interfere with the
performance of the integral water-repellent additives and
cause efflorescence. (Maximum psi is 50.)
MAINTENANCE
Verastone Textured and Mesastone units, properly installed
and cleaned, need virtually no maintenance other than
routine cleaning. For tough stains, contact manufacturer for
specific cleaning recommendations.
INSTALLATION RECOMMENDATIONS
Consult NCMA TEK Notes, available at www.trenwyth.com,
for proper installation of concrete masonry units.
LIMITATIONS
• The facing is not intended for use as an
impervious surface.
• Acid solutions and HCL acid-based cleaners should
not be used as a cleaning agent or in direct contact
with the facing.
w w w. t r e n w y t h . c o m
T X 1

This page intentionally left blank

architectural masonry units
R-Values
Verastone ® Textured
Mesastone ®
R-values of concrete masonry walls are correlated to concrete density, since thermal conductivity of
concrete increases with increasing density. The following tables list a range of R-values for each density.
Contact your Trenwyth representative for specific block densities.
Table 2 — R-Values For 6 in. (152 mm) Concrete Masonry Walls, hr . ft 2.o F/Btu a
Cores filled with:
Density of
concrete
Cores empty
Perlite
Loose-fill insulation
Vermiculite
Polyurethane
foamed insulation
Solid grouted
Construction
Exposed
block, both
sides
pcf range mid range mid range mid range mid range mid
85 2.2-2.5 2.4 4.8-6.1 5.3 4.5-5.6 5.0 5.2-7.0 5.9 1.6-1.8 1.7
95 2.1-2.4 2.2 4.1-5.4 4.6 3.9-5.0 4.3 4.4-6.1 5.0 1.5-1.7 1.6
105 2.0-2.2 2.1 3.5-4.8 4.0 3.3-4.5 3.8 3.7-5.2 4.3 1.4-1.6 1.5
115 1.8-2.1 2.0 3.0-4.2 3.4 2.9-4.0 3.3 3.1-4.5 3.6 1.4-1.5 1.4
125 1.7-2.0 1.8 2.5-3.7 3.0 2.5-3.5 2.9 2.6-3.9 3.1 1.3-1.5 1.4
135 1.6-1.9 1.7 2.2-3.2 2.6 2.2-3.1 2.5 2.2-3.4 2.7 1.3-1.4 1.3
Table 3 — R-Values For 8 in. (203 mm) Concrete Masonry Walls, hr . ft 2.o F/Btu a
Cores filled with:
Density of
concrete
Cores empty
Perlite
Loose-fill insulation
Vermiculite
Polyurethane
foamed insulation
Solid grouted
Construction
Exposed
block, both
sides
pcf range mid range mid range mid range mid range mid
85 2.4-2.7 2.5 6.3-8.2 7.1 5.9-7.5 6.6 6.9-9.4 8.0 1.9-2.1 2.0
95 2.3-2.6 2.4 5.3-7.2 6.1 5.0-6.7 5.7 5.8-8.1 6.7 1.7-2.0 1.8
105 2.1-2.4 2.2 4.5-6.3 5.2 4.3-5.9 4.9 4.8-7.0 5.6 1.6-1.9 1.7
115 2.0-2.3 2.1 3.8-5.5 4.4 3.7-5.2 4.3 4.0-6.0 4.7 1.5-1.8 1.6
125 1.9-2.2 2.0 3.2-4.8 3.8 3.1-4.6 3.7 3.3-5.1 4.0 1.5-1.7 1.5
135 1.7-2.1 1.9 2.7-4.2 3.3 2.7-4.0 3.2 2.8-4.4 3.4 1.4-1.6 1.5
w w w. t r e n w y t h . c o m
T X 2

architectural masonry units
R-Values
Verastone ® Textured
Mesastone ®
Table 4 — R-Values For 10 in. (254 mm) Concrete Masonry Walls, hr . ft 2.o F/Btu a
Cores filled with:
Density of
concrete
Cores empty
Perlite
Loose-fill insulation
Vermiculite
Polyurethane
foamed insulation
Solid grouted
Construction
Exposed
block, both
sides
pcf range mid range mid range mid range mid range mid
85 2.5-2.9 2.7 7.5-9.9 8.5 7.0-9.1 7.9 8.2-11.3 9.5 2.1-2.4 2.2
95 2.4-2.7 2.5 6.3-8.7 7.2 6.0-8.0 6.8 6.7-9.7 7.9 1.9-2.2 2.0
105 2.2-2.5 2.3 5.2-7.5 6.1 5.0-7.0 5.8 5.5-8.2 6.6 1.8-2.1 1.9
115 2.1-2.4 2.2 4.4-6.5 5.2 4.2-6.2 5.0 4.6-7.0 5.5 1.7-2.0 1.8
125 1.9-2.3 2.1 3.7-5.6 4.4 3.6-5.4 4.3 3.8-6.0 4.6 1.6-1.9 1.7
135 1.8-2.1 2.0 3.1-4.9 3.7 3.0-4.7 3.6 3.2-5.1 3.9 1.5-1.8 1.6
Table 5 — R-Values For 12 in. (305 mm) Concrete Masonry Walls, hr . ft 2.o F/Btu a
Cores filled with:
Density of
concrete
Cores empty
Perlite
Loose-fill insulation
Vermiculite
Polyurethane
foamed insulation
Solid grouted
Construction
Exposed
block, both
sides
pcf range mid range mid range mid range mid range mid
85 2.6-3.0 2.8 9.1-12.1 10.3 8.5-11.0 9.6 10.0-13.8 11.5 2.3-2.6 2.4
95 2.4-2.8 2.6 7.6-10.5 8.8 7.2-9.7 8.2 8.2-11.8 9.6 2.1-2.4 2.3
105 2.3-2.6 2.4 6.3-9.1 7.4 6.0-8.5 7.0 6.7-10.0 8.0 2.0-2.3 2.1
115 2.1-2.5 2.3 5.2-7.9 6.2 5.1-7.4 6.0 5.5-8.5 6.6 1.9-2.2 2.0
125 2.0-2.3 2.2 4.4-6.8 5.3 4.2-6.5 5.1 4.5-7.2 5.5 1.8-2.0 1.9
135 1.9-2.2 2.0 3.6-5.8 4.4 3.6-5.6 4.3 3.7-6.1 4.6 1.7-1.9 1.8
Information based on data published by the National Concrete Masonry Association. See NCMA TEK Note
6-2A, available at www.trenwyth.com.
w w w. t r e n w y t h . c o m
T X 3

architectural masonry units
R-Values
Verastone ® Textured
Mesastone ®
Additional r-values can be achieved with factoryinstalled
expanded polystyrene, such as Korfil or
ICON inserts.
Korfil ® Block Insulation inserts are individually
molded expanded polystyrene inserts. Installed at
your Trenwyth manufacturing facility, Korfil insulation
inserts are designed to fit standard two-core
masonry units. Korfil inserts are available in 6", 8",
10" and 12" widths.
R-Values
Both Korfil and ICON inserts offer your building the
following benefits:
• One-step installation of insulated masonry block
saves time and money.
• R-value unaffected by moisture or aging
• Insulated block offers up to a 4-hour fire rating
• Improves dew point and sound transmission
resistance
• Offers space for easy installation of utilities
within wall
• Flame retardant polystyrene
• Use with single-wythe and cavity
wall construction
• No maintenance required
• Available in 6", 8", 10" and 12" widths.
Caution: Expanded Korfil polystyrene should not be
exposed to temperatures exceeding 184ºF.
Applicable Standards:
• ASTM C578 Specification for Rigid Cellular
Polystyrene Thermal Insulation
• ASTM C90 Standard Specification for
Loadbearing Concrete Masonry Units
ICON ® Universal Concrete Block Insulation
Inserts are molded from expandable polystyrene.
Pre-fit at your Trenwyth manufacturing facility, ICON
inserts are designed to compress and fit the core of
all masonry units and significantly improve cmu
thermal efficiency.
w w w. t r e n w y t h . c o m
T X 4

architectural masonry units
R-Values
Verastone ® Textured
Mesastone ®
6" Two-Core Masonry Unit
Density of
Cores Empty Cores Insulated
Block - lbs/ft 9 R t U R t U
80 2.64 .38 6.45 .16
95 2.42 .41 5.39 .19
105 2.29 .44 4.76 .21
115 2.17 .46 4.21 .24
125 2.05 .49 3.69 .27
135 1.95 .51 3.25 .31
12" Two-Core Masonry Unit
Density of
Cores Empty Cores Insulated
Block - lbs/ft 9 R t U R t U
80 3.12 .32 9.38 .11
95 2.83 .35 8.09 .12
105 2.66 .38 7.27 .14
115 2.52 .40 6.51 .15
125 2.38 .42 5.78 .17
135 2.26 .44 5.11 .20
8" Two-Core Masonry Unit
Density of
Cores Empty Cores Insulated
Block - lbs/ft 9 R t U R t U
80 2.86 .35 7.74 .13
95 2.61 .38 6.55 .15
105 2.46 .41 5.83 .17
115 2.33 .43 5.17 .19
125 2.21 .45 4.56 .22
135 2.10 .48 4.01 .25
12" Cavity Wall, 4" Outer Wythe,
3/4 Air Space, 8" Two-Core Block
Density of
Cores Empty Cores Insulated
Block - lbs/ft 9 R t U R t U
80 4.26 .23 9.14 .11
95 4.01 .25 7.95 .13
105 3.86 .26 7.23 .14
115 3.73 .27 6.57 .15
125 3.61 .28 5.96 .17
135 3.50 .29 5.41 .28
10" Two-Core Masonry Unit
Density of
Cores Empty Cores Insulated
Block - lbs/ft 9 R t U R t U
80 3.00 .33 8.52 .12
95 2.73 .37 7.25 .14
The r-values and u-values are based on
information provided by insert manufacturer,
CBIS. Values are based on ASHRAE and
NCMA publications.
For more information, contact your Trenwyth
representative or visit www.cbisinc.com.
105 2.57 .39 6.48 .15
115 2.43 .41 5.76 .17
125 2.31 .43 5.09 .20
135 2.19 .46 4.48 .22
w w w. t r e n w y t h . c o m
T X 5

architectural masonry units
ASTM Reports
Verastone ® Textured
Mesastone ®
ASTM C-90 specifies the following tests for load bearing concrete masonry walls
Compressive Strength and
Moisture Absorbancy
A test to ensure that blocks meet strength
and moisture requirements and are free of
cracks and other defects.
Complies
w w w. t r e n w y t h . c o m
T X 6

architectural masonry units
Block Characteristics
Fire Rating
Verastone ® Textured
Mesastone ®
Fire resistance ratings can be calculated using a method that multiplies the percent of solid material in the
concrete masonry unit by the actual thickness (in inches) of the blocks to determine the hourly rating for the
type of aggregate used. Contact your Trenwyth representative for specific fire ratings.
FIRE RESISTANCE RATINGS/MINIMUM REQUIRED EQUIVALENT INCHES
Aggregate Type in
The Concrete Masonry Unit
Fire Resistance
0.5 Hr. 0.75 Hr. 1 Hr. 1.5 Hr. 2 Hr. 3 Hr. 4 Hr.
Calcareous or siliceous gravel 2.0 in. 2.4 in. 2.8 in. 3.6 in. 4.2 in. 5.3 in. 6.2 in.
Limestone, cinders or slag 1.9 in. 2.3 in. 2.7 in. 3.4 in. 4.0 in. 5.0 in. 5.9 in.
Expanded clay, shale or slate 1.8 in. 2.2 in. 2.6 in. 3.3 in. 3.6 in. 4.4 in. 5.1 in.
Expanded slag or pumice 1.5 in. 1.9 in. 2.1 in. 2.7 in. 3.2 in. 4.0 in. 4.7 in.
Calculating "Equivalent Thickness" is simply determining what the block thickness would be if the same
amount of material contained in a hollow unit were re-molded without core holes.
Nominal Width
(Inches)
EQUIVALENT THICKNESS OF CONCRETE MASONRY UNITS (IN INCHES)
Based on Typical
Hollow Units (1)
Equivalent Thickness
Based on Percent Solid
(75% - semi-solid) (100% - solid)
4 2.68 (73.8%) 2.72 3.625
6 3.09 (55.0%) 4.22 5.625
8 4.04 (53.0%) 5.72 7.625
10 4.98 (51.7%) 7.22 9.625
12 5.77 (49.6%) 8.72 11.625
CALCULATING ESTIMATED FIRE RESISTANCE EXAMPLE
An 8" hollow masonry wall is constructed of expanded slag units reported to be 53%* solid. What is the
estimated fire resistance of the wall (modular units)?
Equivalent Thickness = % solid x depth
Example: .53 x 7.625 in. = 4.04 inches
From Table: 3 hr. Fire Resistance requires 4.0 inches
*Percentage solid can be calculated from net area or net volume as determined by ASTM C140
"Methods of Testing Concrete Masonry Units".
(1) Information based on data published by the National Concrete Masonry Association in NCMA TEK 7-1A,
available at www.trenwyth.com.
w w w. t r e n w y t h . c o m
T X 7

architectural masonry units
Installation
Verastone ® Textured
Mesastone ®
IMPORTANT! Before You Begin
Manufacturer requires that you order a full size
unit to illustrate color and texture for approval.
Manufacturer also requires a sample panel be
installed at the jobsite prior to installation of any
Trenwyth products. This panel will represent the
quality, color and texture of the product and the
workmanship to be expected for the project. Either
the owner or the project architect must approve the
panel. Failure to produce a sample panel may result
in loss of warranty. Manufacturer will provide 4" units
for a 4' x 4' sample panel at no cost for the material
(excluding freight to the site).
Delivery, Storage and Handling
Mesastone and Verastone Textured masonry units
shall be delivered to the jobsite on covered banded
pallets with cardboard between the layers. Keep
protective block covers on the blocks until
installation. Store pallets in single stacks on level
ground and cover with waterproof covering (e.g.,
tarpaulins) to protect the blocks from inclement
weather. Handle blocks carefully to avoid
breakage and damage to the finished surface.
Project Site Conditions
Protection of Work: Cover walls, including open
tops, each day after installation to keep open walls
protected and dry. After units are installed, they
should be protected from damage by other trades
performing operations that can stain or otherwise
damage the finished surfaces by covering walls with
plastic. Corners should be protected from damage
after installation by covering them with plywood.
Do not, under any circumstance, install a damaged
unit that does not conform to the requirements of
ASTM C90. If units have been damaged during
transit, contact manufacturer immediately.
INSTALLATION
Laying Masonry Walls
Draw blocks from more than one pallet at a time
during installation. All exterior mortar shall include
manufacturer-approved matching water-repellent
additive added to each batch in the appropriate
dosage rates for mortar type (M, S or N) per
manufacturer's instructions.
Refer to NCMA TEK Notes, available at
www.trenwyth.com, for Hot and Cold weather
construction practices.
Lay units using the best concrete masonry
practices. Install only quality units; reject all defective
units as defined by ASTM C90. Lay blocks with the
faces level, plumb and true to the line strung
horizontally at the ground face. Units shall have
uniform, 3/8"-wide joints both horizontally and
vertically on the finished side of the wall. Tool joints
neatly after they are finger-hard to make them
straight and uniform. Size and place cut pieces
appropriately to maintain consistency and bond.
Complete masonry construction using procedures
and workmanship consistent with the best masonry
practices.
Lighting: Provide adequate lighting for masonry
work by placing all lighting at a reasonable distance
from the wall for even illumination. Do not use
trough lighting.
Cutting: Make all unit cuts, including those for
bonding, holes, boxes, etc., with motor driven
masonry saws, using either an abrasive or diamond
blade. Cut neatly and locate for best appearance.
Mortar Bedding and Jointing:
1. Lay units with full mortar coverage on head and
bed joints taking care not to block cores to be
grouted or filled with masonry insulation.
2. Tool all mortar joints when thumbprint hard into a
concave configuration.
3. Care should be taken to remove mortar from the
face of masonry units before it sets.
4. Tuckpoint the joints of scored units for proper
appearance. All exterior scored units must be
tuckpointed to prevent water penetration. NO
RAKED JOINTS.
Flashing of Masonry Work
Install flashing at locations shown in the plans and in
strict accordance with the details and the best
masonry flashing practices.
w w w. t r e n w y t h . c o m
T X 8

architectural masonry units
Installation
Verastone ® Textured
Mesastone ®
Weep Holes and Vents
Install weep holes and vents at proper intervals at
courses above grade and at any water stops over
windows, doors and beams. Consult NCMA TEK
Notes, available at www.trenwyth.com, for additional
flashing information.
Inspection
The textured faces shall conform to the requirements
of ASTM C90 when viewed from a distance of
twenty (20) feet at right angles to the wall with
normal lighting.
Installation Recommendations
Consult NCMA TEK Notes, available at
www.trenwyth.com, for proper installation of
concrete masonry units.
Limitations
• The facing is not intended for use as an
impervious surface.
• Acid solutions and HCL acid-based cleaners
should not be used as a cleaning agent or in direct
contact with the facing.
• Mesastone and Verastone Textured facings should
not be continuously exposed to temperatures
above 250ºF.
w w w. t r e n w y t h . c o m
T X 9

architectural masonry units
Cleaning
Verastone ® Textured
Mesastone ®
Walls must be cleaned on a daily basis as
block laying proceeds.
Masonry surfaces clean most effectively if the
cleaning is done within 14-28 days after masonry
installation. Mortar and grout smears that remain on
the surface for a longer time result in a more difficult
cleandown and may cause undesirable results.
Final cleandown of masonry surfaces should be
completed before installation of windows, doors,
hardware, light fixtures, roofing materials and any
other non-masonry item that may be damaged by
the cleaning product. If such fixtures have been
installed, they must be protected before the cleaner
is applied. All caulking and sealant materials
should be in place and thoroughly cured
before cleaning begins.
Protect all surrounding metal and non-masonry
materials, painted surfaces and plant life from
contact with the cleaner, residue or fumes.
Masonry Cleaners
Use Burnished Custom Masonry Cleaner by
PROSOCO (dilute one part to 3 parts clean
water), carefully following manufacturer’s
instructions. Available from manufacturer.
Do not powerwash.
CAUTION! Never use muriatic acid on units.
Prior to overall application, always test the cleaner
(minimum 4' x 4' area) to ensure suitability and
desired results. Test each type of masonry and each
type of stain. Allow test area to dry for 3 – 7 days
before inspection and approval by the project
architect or building owner. Clean test areas
according to the application below and always make
the test panel available throughout the cleaning
project.
• Always pour cold water into an empty bucket first
before carefully adding detergent.
• Never use hot water.
• Handle in polyethylene or rubber buckets only.
• Acidic materials and fumes will attack metal.
Exterior Test Application
The following cleaning procedure is recommended
unless otherwise indicated during testing:
1. Thoroughly saturate a large portion of the
masonry surface with clean water.
2. Using a densely-packed, soft-fibered masonry
washing brush or low-pressure spray (50 psi
maximum), apply diluted solution freely. Do not
apply Burnished Custom Masonry Cleaner with
pressure spray above 50 psi. Such an application
will drive the chemicals deep into the surfaces
making it more difficult to rinse completely and
may cause efflorescence.
3. Depending on the absorption rate of masonry and
drying conditions, allow cleaning solution to
remain on the wall for approximately five (5)
minutes. Do not allow cleaner to dry into the
masonry because it may leave a residue and
cause staining.
4. Reapply cleaning solution and scrape off heavy
buildup of excess mortar using a wooden scraper.
Take care to avoid damaging the masonry
surface. Do not use metal scrapers, which may
contribute to metallic staining.
Note: Avoid more than one reapplication over the
same area. Repeated applications may cause a
white detergent film to be deposited on the masonry
surface. If mortar deposits are not softened after
initial application, allow the solution to remain on the
wall for a longer period of time making sure that the
cleaner does not dry into the masonry.
5. Rinse thoroughly with fresh water, removing all
cleaning compound, free sand, loose materials
and debris. Thorough rinsing is extremely
important to ensure that all residues are removed
from the porous masonry.
Note: To avoid streaking, keep adjacent and
lower wall surfaces wet and rinsed free of
cleaning residues.
w w w. t r e n w y t h . c o m
T X 1 0

architectural masonry units
Cleaning
Verastone ® Textured
Mesastone ®
Interior Application
Follow the cleaning procedure outlined for exterior
surfaces. Rinse thoroughly with fresh water using a
sponge or soft-fiber brush. If conditions do not allow
sufficient water for complete rinsing, use a
neutralizing rinse and the following procedure:
1. Rinse first with fresh, clean water.
2. Apply neutralizing rinse of two ounces household
ammonia to one gallon of clean water.
3. Saturate thoroughly and allow neutralizing solution
to dwell on the surface 3 to 5 minutes.
4. Apply a final rinse of fresh, clean water.
General
• Keep walls clean by using brushes or rags
and the burlap squares supplied on the
Mesastone and Verastone Textured pallets.
• Do not allow excess mortar lumps or smears to
harden on the finished surfaces.
• Remove green mortar with burlap or a dry cloth.
• Wipe masonry blocks clean with burlap (provided
with each cube) as the blocks are laid each day.
• Protect stored materials and the wall prior to
completion to prevent excessive water entry and
external soiling.
• Test an unexposed portion of adjacent metal
fixtures with the cleaning solution. If corrosion or
staining occurs, protect the exposed portions.
(Harsh cleaning methods after walls have been
erected may mar the surface of the blocks.)
• Protect adjacent masonry and floor area by
saturating with water and flushing away any
cleaning solution before it dries.
Materials
• Two plastic or hard rubber buckets
• Rubber gloves
• Soft fiber masonry brushes (or whitewash brushes)
• Wooden, plastic or other soft, non-staining
scraping device
• Supply of “clean” wipers, such as lint-free cloths or
paper towels
• Clean water
• Burnished Custom Masonry Cleaner (dilute one
part to 3 parts of clean water). Do not apply
with pressure spray above 50 psi. It will cause
efflorescence.
DO NOT USE ACID.
Cleaning Procedure 1
1. Brush clean water liberally on the surface area to
be cleaned. Brush approximately one square yard
at a time.
2. It is important that the masonry wall be kept wet
at all times. Do not use dirty water.
3. Apply cleaning solution brushing in a circular
motion to remove any unwanted mortar smears.
4. Remove excess lumps of mortar with the soft
(wood or plastic) scraping device and re-apply
cleaning solution.
5. Allow cleaning solution to remain on the surface
for two or three minutes then wash off with liberal
amounts of fresh, clean water.
6. Wipe the walls down completely dry with clean,
dry wipers.
w w w. t r e n w y t h . c o m
T X 1 1

architectural masonry units
Cleaning
Verastone ® Textured
Mesastone ®
Cleaning Procedure 2
If liberal amounts of water cannot be used, an
alternative procedure may be employed.
1. Soak a clean wiper in the cleaning solution. Wring
it out so it is wet enough to dampen the surface,
but dry enough so that the solution will not run
down the wall.
2. Allow the solution to remain on the surface for
two or three minutes. Remove excess lumps of
mortar with the soft scraping device and repeat
Step #1.
3. Wipe the wall completely dry with clean,
dry wipers.
Note: To remove mortar smears that have been
allowed to harden on the wall and cannot be
removed by following the procedures listed above, a
solution of Burnished Custom Masonry Cleaner by
PROSOCO may be used with a dilution ratio of 1
part cleaner to 3 parts clean water, strictly following
manufacturer’s instructions.
WARNING! Never use muriatic acid solutions
on Mesastone or Verastone Textured units.
Maintenance
Mesastone and Verastone Textured units,
properly installed and cleaned, need virtually no
maintenance other than routine cleaning with
standard commercial grade cleaning agents
such as PINESOL ® or FANTASTIK ® . For tough
stains, contact manufacturer for specific cleaning
recommendations. DO NOT POWERWASH.
Final Cleandown
Clean the completed walls with a detergent masonry
cleaner strictly following the manufacturer’s
instructions including thorough rinsing. Do not
use acid or abrasives on the block surfaces. For
stubborn mortar stains or smears, a 3:1 solution
of Burnished Custom Masonry Cleaner by
PROSOCO may be used as long as the walls are
thoroughly wetted with clean water before applying
the cleaning solution and thoroughly rinsed with
clean water immediately after washing. Failure to
strictly follow manufacturer’s instructions can result
in permanent damage to the finished faces. DO
NOT POWERWASH.
w w w. t r e n w y t h . c o m
T X 1 2

architectural masonry units
Shapes & Sizes
Coding System
Verastone ® Textured
Mesastone ®
Shapes and Sizes Coding System
All units are nominal 8" and 16" lengths unless
modified by symbols as noted below. In some
instances, only the first two (2) symbols will be used.
Other symbols are added as required.
The coding system is based on a series of symbols
that define the size, general type and variance from
standard length and return.
1. The 1st part is the number denoting the
nominal thickness:
1", 2", 4", 6", 8", 10" and 12"
2. The 2nd part is the letter or combination of letters
denoting the general type of unit.
F = 1 Face Ground
FF = 2 Faces Ground
E = End Ground
EE = 2 Ends Ground
V = Vertical Score
H = Horizontal Score
BN = Bull Nose
T = Top Ground
B = Bottom Ground
C = Chamfer Ground
U = Bond Beam (specify open
or solid bottom)
3. The 3rd part is a number denoting length of the
unit varying from the standard 16" length.
Example: 4FE8 is a 4" thick face and end
ground unit that is 8" long.
4. The 4th part is a letter denoting the hand of the
appropriate return unit.
R = Right Hand L = Left Hand
5. SPECIAL NOTE: For unit heights varying
from the nominal 8", the numeral denoting
height immediately follows the numeral
denoting thickness.
Example: 4SFEBN is a nominal
4" thick, 5" high face ground,
end ground, bullnose unit.
6. DA# denotes the scoring pattern.
(See Page TS 15)
w w w. t r e n w y t h . c o m
T X 1 3

architectural masonry units
Shapes & Sizes
Verastone ® Textured
Mesastone ®
Note: Not all sizes are shown in this brochure. Please consult your nearest manufacturing facility.
Metric shapes and sizes are available.
2F
7 5/8"
4FT
7 9 /16"
4FE
7 5/8"
4F
7 5/8"
6F
8F
15 5/8"
3 9 /16"
15 5 /8"
15 9/16"
Also available in 6, 8,
Available in hollow,
10 & 12” thicknesses. semi-solid or solid units.
44F
8FE
8FEBN
10F
1 9/16"
3 9/16"
3 9/16"
15 5/8"
3 5 /8"
75/8"
5 9/16" 155/8"
8FT
7 9/16"
8FETR*
75/8"
155/8"
7 9/16"
7 9/16" 3 9/16"
Also available in 8" thickness.
8F8 Solid
8F8 Hollow
7 9/16"
15 9/16" 7 5/8"
15 5/8"
7 5/8"
7 5/8"
7 9/16"
Also available in 2, 4,
6, 10 & 12” thicknesses.
7 9/16"
Also available in 4, 6,
10 & 12" thicknesses.
8FTBN 4 FE 135º
7 9/16"
15 9/16"
7 5/8"
7 5/8"
7 5/8"
"
4 FE L CORNER
7 9/16"
9 9/16"
KOBB
(Open Bottom)
7 9 /16"
15 5 /8"
15 5/8"
15 9/16"
Also available in 6,
10 & 12” thicknesses.
7 5/8"
Also available in 12” thickness.
3 9/16"
7 5/8"
7 5 /8"
Open Ended Bond Beams (Available from the Phoenix, AZ facility only.)
OE1E
DCBB OE2E
DCBB OE1E
3 9 /16"
15 5 /8"
Also available in 2, 6, 8, 10
& 12” thicknesses.
8UF (v-block)
7 9/16"
FHA
(KOBB with
Solid Bottom)
7 9 /16"
15 5/8"
15 5 /8"
7 5/8"
7 5 /8"
Also available in 6,
10 & 12” thicknesses.
79/16"
155/8"
79/16"
7 9/16"
code designations
F = 1 Face Ground
FF = 2 Faces Ground
E = End Ground
EE = 2 Ends Ground
V = Vertical Score
H = Horizontal Score
BN = Bull Nose
T = Top Ground
B = Bottom Ground
C = Chamfer Ground
U = Bond Beam
15 9/16" 7 9/16"
Also available in 2, 4
& 6" thicknesses.
*Specify right or left (right shown)
All Trenwyth concrete masonry
units are manufactured with
an integral moisture resistant
admixture to repel moisture and
prevent mold and efflorescence.
7 5 /8"
7 5 /8"
7 5 /8"
7 5 /8"
15 5 /8"
7 5 /8"
15 5 /8"
7 5 /8"
15 5 /8"
Also available in 4, 6, 10 & 12" thickness.
Chamfered corners minimize chipping and eliminate sharp corners. Not all chamfer designations are shown.
Any side can be chamfered.
8FE C1
8FT C2 8FET * C4
8FFE C5
chamfers
8FEE C11
1"
Trendstone ® /Acousta-Wal ® units
Control noise pollution in your Type IV
project with Trendstone ® /
Acousta-Wal ® units.
*Specify right or left (right shown)
For more information refer
to the Acousta-Wal ® section.
w w w. t r e n w y t h . c o m
T X 1 4

architectural masonry units
Scoring Patterns
Verastone ® Textured
Mesastone ®
• Score Dimensions. The width of the score is 3/8".
• Tuckpoint and scored joints. All scored joints
must be tuckpointed to prevent moisture
penetration and to match the real joints between
the blocks. This gives a more realistic, pleasing
appearance to the finished wall.
• Special scoring. Written dimensions and a sketch
are required in order to produce special scoring.
Limitations: No more than five (5) vertical scores or
two (2) horizontal scores are acceptable on the
face of a block. DO NOT USE RAKE JOINTS.
V1 V2 H1
8x8 Score 8x5 Score 4x16 Score
Design Your Own
w w w. t r e n w y t h . c o m
T X 1 5

Colors
Verastone ® Textured
architectural masonry units
Eastern Selection
Note: All color samples are intended to be representative only. For accurate color selection, always request a full size sample.
Chablis
Group C
Vintage
Group C
Palomino
Group C
Rhine Grey
Group C
Chianti
Group C
Midwest Selection
Note: All color samples are intended to be representative only. For accurate color selection, always request a full size sample.
Chardonnay
Group C
Superior
Group C
Austin
Group C
Toffee
Group C
Old Country
Group C
Cambria
Group C
Fossil Reef
Group C
Cabernet
Group C
Schiraz
Group C
w w w. t r e n w y t h . c o m
T X 1 6

Eastern Colors Selection
Mesastone ®
architectural masonry units
Note: All color samples are intended to be representative only. For accurate color selection, always request a full size sample.
Natural
Eastern Group A
Delmarva
Eastern Group A
Manchester
Eastern Group A
Alamo
Eastern Group C
Terra Cotta
Eastern Group C
Fawn
Eastern Group C
Hawthorne
Eastern Group B
Rutherford Grey
Eastern Group B
Gunsmoke
Eastern Group C
Ashland
Eastern Group C
Plum
Eastern Group C
Dover Grey
Eastern Group B
Fairfield
Eastern Group C
Temple Grey
Eastern Group C
Cambridge
Eastern Group C
Shannon
Eastern Group D
Valley Green
Eastern Group D
Burford Brown
Eastern Group B
Canyon Stone
Eastern Group C
Colonial Red
Eastern Group C
Andover
Eastern Group A
Canterbury
Eastern Group A
Madison
Eastern Group B
Ravenstone
Eastern Group A
Williamsburg Grey
Eastern Group A
Windermere
Eastern Group A
Carson Brown
Eastern Group B
Greystone
Eastern Group B
Wine
Eastern Group B
Pembroke
Eastern Group C
Ramapo White
Eastern Group C
Hampton Green
Eastern Group E
w w w. t r e n w y t h . c o m
T X 1 7

Midwest Colors Selection
Mesastone ®
Note: All color samples are intended to be representative only. For accurate color selection, always request a full size sample.
Bradley
Midwest Group B
Natural MW
Midwest Group A
Butterfield IV
Midwest Group A
Elmhurst
Midwest Group A
Lincoln
Midwest Group A
Belvidere
Midwest Group A
Springfield
Midwest Group A
Sandstone III
Midwest Group A
Sterling
Midwest Group A
Red Bud
Midwest Group B
Oak
Midwest Group B
Light Brown
Midwest Group B
County Gray
Midwest Group B
Sequoia
Midwest Group C
Tawny
Midwest Group B
Limestone II
Midwest Group C
Bloomington
Midwest Group B
Colonial Red M
Midwest Group B
Jewelstone
Midwest Group C
Shadow Gray
Midwest Group C
Ash Charcoal
Midwest Group B
Gray Marble
Midwest Group C
Light Karmel
Midwest Group C
Midwest White
Midwest Group C
Spice
Midwest Group C
Knight Gold
Midwest Group C
Gray Stone
Midwest Group B
Irish Cream
Midwest Group C
Oreo Cream
Midwest Group C
Chocolate
Midwest Group C
Brick Red M
Midwest Group C
Almond Bark
Midwest Group C
Haydite
Midwest Group C
Sundown
Midwest Group C
Aztec Tan
Midwest Group C
Irving Cream
Midwest Group C
Baton Rouge
Midwest Group C
Gold Stone
Midwest Group C
Lasalle
Midwest Group A
Marengo
Midwest Group C
Sedalia
Midwest Group B
w w w. t r e n w y t h . c o m
T X 1 8

West Colors Selection
Mesastone ®
architectural masonry units
Note: All color samples are intended to be representative only. For accurate color selection, always request a full size sample.
Pebble Beach
West Group A
Huntington Gray
West Group A
Riverside
West Group B
Red Rock
West Group B
Walnut Creek
West Group B
Fuego Red
West Group B
Black Canyon
West Group B
San Mateo Rose
West Group B
Malibu Sand
West Group C
Black Mountain
West Group B
Plum
West Group B
Hopi Sandstone
West Group B
Papago Red
West Group B
Showlow Sunset
West Group B
MW Bone
West Group B
Modesto
West Group B
Anthem Red
West Group B
Newport
West Group B
Autumn
West Group B
Beverly Spice
West Group B
Mojave Brown
West Group B
Monterey Stone
West Group B
Ballpark Buff
West Group B
Berkeley
West Group B
Mission White
West Group D
Seashell
West Group D
Hopi Sandstone
West Group B
Pearl
West Group D
Purple Hart
West Group C
Willow Green
West Group D
NEW NEW NEW NEW
Sierra
West Group D
Durango
West Group D
Rutherford
West Group D
Southwest Gold
West Group D
w w w. t r e n w y t h . c o m
T X 1 9

Monumental Series
over-sized masonry units
the logical choice
for making a bigger statement.

04
Monumental units are over-sized to give you the freedom to create designs of monumental
proportions. Monumental Series over-sized units are available in the following finishes:
ground face, filled and polished or textured
Monumental Series advantages at a glance
Over-sized Variations of Available in Verastone ® , Verastone ® Plus, Trendstone ® , Trendstone Plus ® , Verastone ®
Trenwyth Units Textured and Mesastone ® finishes, the Monumental Series provides the same durability and
design flexibility as our standard size masonry units.
Large Scale Designs Large and specialty size units are perfect for large scale walls, columns and arches.
One-step Installation Single trade installation of finished load-bearing or non-load-bearing walls saves
time and money.
Preserved Beauty Factory-applied clear satin gloss or water-based sealer accentuates the natural beauty of
Verastone, Verastone Plus, Trendstone and Trendstone Plus aggregates while protecting
from moisture and the elements.
Moisture / Mold Resistant Monumental over-sized units are manufactured with an integral water repellent admixture
to repel moisture and prevent mold and efflorescence.
Easy to Clean Monumental units with a Verastone Plus and Trendstone Plus finish are specially made to
provide a surface that offers easy removal of graffiti and hard-to-clean dirt.
Low Maintenance Monumental over-sized units are virtually maintenance free and will last the lifetime of
your building with no refinishing.
Colors, Shapes & An extraordinary color palette and a wide variety of shapes and scoring patterns
Scoring Patterns are available for maximum design flexibility. Monumental units are available in most
Verastone, Verastone Plus, Trendstone, Trendstone Plus, Verastone Textured and
Mesastone colors.
Fire Protection Monumental units features up to a 4-hour fire rating.
Regional Color Options The aggregates are native to your region allowing your building to blend naturally with
your environment.
Recycled Content Monumental units with a Verastone recycled ground face, Verastone Plus recycled filled
and polished or Verastone Textured recycled finish contain a significant amount of recycled
pre-consumer content that may earn LEED Green Building Rating Points ® for your building.
Availability Monumental units with a Trendstone, Trendstone Plus or Mesastone finish are manufactured
nationally in to provide convenient service anywhere in the USA. Monumental units with a
Verastone, Verastone Plus or Verastone Textured finish are manufactured in PA and IL.
Monumental Series
over-sized masonry units

Table of Contents
Monumental Series
architectural masonry units
Shapes & Sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . MON 1
Monumental Series over-sized concrete masonry units are available in Verastone ® , Verastone ® Plus,
Trendstone ® , Trendstone Plus ® , Mesastone ® and and Verastone ® Textured finishes. The attributes of
Monumental units are dependant upon the finish you choose. Therefore, once you have chosen your finish,
refer to the Verastone and Verastone Plus, Trendstone and Trendstone Plus or Verastone Textured and
Mesastone tabs wthin this binder for up-to-date technical information regarding that finish.
Specifications
R-Values
ASTM Reports
Block Characteristics/Fire Ratings
Graffiti Removal
Installation Instructions
Cleaning Instructions
Field Coat Application
Shapes & Sizes Coding System
Scoring Patterns
Frequently Asked Questions
w w w. t r e n w y t h . c o m
M O N T O C

This page intentionally left blank

Shapes/Sizes
Monumental Series
architectural masonry units
416F24
23 5 /8"
15 5 /8 "
416F
15 5 /8"
15 5 /8"
412F24
23 5 /8"
11 5 /8 "
4F24
23 5 /8"
7 5 /8"
3 9 /16"
3 9 /16"
3 9 /16"
3 9 /16"
412F12
8F18
Keystone Unit
Keystone Arch Unit
Cornice Unit
11 5 /8"
11 5 /8"
17 5 /8"
7 5 /8"
7 5 /8"
7 9 /16"
7 5 /8"
7 9 /16"
7 5 /8" 11 9/ 16"
7 5 /8"
7 9 /16"
15 5 /8"
7 5 /8"
3 9 /16"
VARIES
VARIES
Slant Sill
Slant Sill
Sculpted Sill
Water Table
Corbel Unit
7 5 /8"
15 5 /8"
7 5 /8" 3 1 /2"
7 5/8"
4"
3 5 /8"
7 5 /8"
7 5 /8"
7 1 /2"
7 1 /2"
7 5/8"
3 5 /8"
7 9 /16"
7 9 /16"
7 1 /2"
Medallion Unit
3 5 /8"
7 5 /8"
2"
3 5 /8"
Full Bullnose
15 5 /8"
7 1 /2"
3 13 /16"R
7 9 /16"
135º Outside Corner
7 9 /16"
7 5 /8"
7 5 /8" 7 5 /8"
135º Inside Corner
7 9 /16"
7 5 /8" 7 5 /8"
7 5 /8"
Chamfer Unit
Scored Unit
Column Wrap
3 9 /16"
Cap Unit
15 5 /8"
7 5 /8"
15 5 /8"
7 5 /8"
12" Radius
16 9 /16"
2"
7 5 /8"
9 1 /2"
7 9 /16"
7 9 /16"
3/8"
3/8"
for best appearance, use stack bond
15 5 /8"
2"
Monumental Series sizes are available in Verastone ® , Verastone ® Plus,
Trendstone ® , Trendstone Plus ® , Mesastone ® and Verastone ® Textured
masonry units. Call Trenwyth for availability.
w w w. t r e n w y t h . c o m
9 1 /2"
M O N 1

This page intentionally left blank

Acousta-Wal ®
sound-absorbing masonry units
the perfect blend
of design and sound control.

04
Acousta-Wal sound-absorbing masonry units are structural units uniquely designed to
absorb sound waves, providing the perfect solution to noise problems, indoors or out.
Acousta-Wal ® advantages at a glance
Unique Sound-Absorbing
Design
Acousta-Wal sound absorbing units are structural concrete masonry units with a
closed top and vertical slots on the face exposing the inner cavity. Working much like an
automobile muffler, the closed-end cavities resonate sound waves of different frequencies,
converting them harmlessly to heat.
Absorbs All Sound Frequencies
Controls Sound Transmission
One-step Installation
Moisture / Mold Resistant
Recycled Content
Variety of Finish Options
Permanent Solution
Acousta-Wal is especially effective at absorbing difficult to control low frequencies.
The unique design of the masonry unit greatly reduces the transmission of sound
to adjacent areas.
Single trade installation of finished load-bearing or non-load-bearing walls saves
time and money.
All Acousta-Wal units are manufactured with an integral water repellent admixture to
repel moisture and prevent mold and efflorescence.
Acousta-Wal sound-absorbing units with the Verastone recycled ground face finish contain
a significant amount of pre-consumer recycled content than may earn LEED Green Building
Rating Points ® for your building. Acousta-Wal / Astra-Glaze-SW+ glazed sound-absorbing
units are available with pre-consumer content.
Acousta-Wal sound-absorbing units are available in the following finishes: Astra-Glaze-SW+
glazed, Verastone recycled ground face, Trendstone ground face and Grey block.
Acousta-Wal is durable, resistant to mechanical damage and offers sound control for the
lifetime of the building.
Acousta-Wal ®
sound-absorbing masonry units

Table of Contents
Acousta-Wal ®
architectural masonry units
Acousta-Wal ® Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AW 1
Astra-Glaze-SW ® /Acousta-Wal Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AW 2 – 3
Verastone ® /Acousta-Wal Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AW 4
Trendstone ® /Acousta-Wal Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AW 5
Sound Absorption Coefficients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AW 6
R-Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AW 7 – 10
Noise Reduction Coefficients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AW 11
Sound Transmission Comparisons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AW 12
Block Characteristics/Fire Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AW 13
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AW 14 – 15
Frequently Asked Questions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AW 16 – 18
Acoustical Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . AW 19
w w w. t r e n w y t h . c o m
A W T O C

This page intentionally left blank

Acousta-Wal Specifications
PART 1 – GENERAL
SUBMITTAL
Submit product literature, certifications, test reports and full
size sample(s).
QUALITY ASSURANCE
All glazed sound-absorbing masonry units shall be
Acousta-Wal units produced with special mold parts
available from manufacturer. Units shall be manufactured
to meet ASTM C90. Production shall be monitored so that
the top of the units shall be completely closed and edges
of slots and ends of blocks shall be straight and clean.
Type IV units shall have fillers as supplied by Trenwyth
manufacturers, inserted in the cavities at the block plant.
Type IV fillers shall be fiberglas fillers laminated to metal
septa. All filler material shall be cut accurately to size and
installed as recommended for the type of Acousta-Wal
units specified. All units contain manufacturer-approved
integral water repellent CMU admixture at the time
of manufacture.
Acousta-Wal units shall have either a glazed face, ground
face or a natural gray block surface.
Astra-Glaze-SW+/Acousta-Wal and Verastone/Acousta-Wal
units are available with pre-consumer recycled content.
Contact your Trenwyth representative for details.
Fire Resistance: Define hourly ratings by NCMA TEK Notes,
available at www.trenwyth.com.
Field Constructed Mock-ups: Construct a sample panel, no
less than 4' x 4', of units of each color and size to be used
in the project.
Manufacturer requires ordering a full size unit to illustrate
color and texture for approval. Manufacturer requires that a
jobsite sample panel be installed at the jobsite prior to
installation of any Trenwyth products. This panel will
represent both the quality of the product and the
workmanship to be expected for the project. The panel
must be approved by either the owner or architect for
the project. Manufacturer will provide 4" units for a 4' by 4'
sample panel at no cost for the material (excluding freight
to site).
DELIVERY, STORAGE, AND HANDLING
Acousta-Wal units shall be delivered to the jobsite on
covered banded pallets with cardboard between layers.
Store pallets in single-stacks on level ground and cover
with waterproof covering (e.g., tarpaulins) to protect the
blocks from inclement weather. Handle blocks carefully to
avoid breakage and damage to the finished surfaces.
PROJECT/SITE CONDITIONS
Protection of Work: Cover walls each day after installation to
keep open walls protected and dry.
PART 2 – PRODUCTS
PRODUCT NAME
ACOUSTA-WAL ® sound absorbing concrete masonry units.
Finishes include:
• Astra-Glaze-SW+ ® /Acousta-Wal ® glazed
sound-absorbing concrete masonry units
• Verastone ® /Acousta-Wal ® recycled ground face
sound-absorbing concrete masonry units
• Trendstone ® /Acousta-Wal ® ground face
sound-absorbing concrete masonry units
• Gray block/Acousta-Wal ®
sound-absorbing concrete masonry units
MANUFACTURER
Anchor Concrete Products (800) 233-1924
One Connelly Road • Emigsville, PA 17318
Anchor Concrete Products (800) 233-1924
Church Road • Emigsville, PA 17318
Northfield Block Company (800) 358-3003
3400 East Bungalow Road • Morris, IL 60450
Superlite Block (800) 331-9823
4626 N. 42nd Avenue • Phoenix, AZ 85019
RELATED MATERIALS
Colored matching or contrasting mortar is available from
manufacturer. Consult NCMA TEK Notes, available at
www.trenwyth.com, for mortar type and specifications. For
all exterior mortar, use matching manufacturer-approved
water repellent mortar additive, following manufacturer’s
instructions. Consult manufacturer for recommendations.
SIZES AND SHAPES
Acousta-Wal surfaces are manufactured to provide finished
dimensions of 7-5/8" x 15-5/8" ± 1/8". Bed depth
dimensions for single face units are 3-9/16", 5-9/16",
7-9/16", 11-9/16" ± 1/8". Two face units are 3-1/2", 5-1/2",
7-1/2", 11-1/2" ± 1/8". Please contact manufacturer for
specific size availability.
PART 3 – EXECUTION
LAYING MASONRY WALLS
Draw blocks from more than one pallet at a time during
installation. All exterior mortar shall include a manufacturerapproved
water repellent additive added to each batch in
the appropriate dosage rates for mortar type (M, S or N)
per manufacturer’s instructions. Refer to NCMA TEK Notes,
available at www.trenwyth.com, for Hot and Cold weather
construction practices.
Acousta-Wal units shall be installed by the general contractor
or masonry contractor. Installation of Acousta-Wal blocks
shall be consistent with the best concrete masonry practices.
Only quality units shall be used.
Acousta-Wal blocks shall be laid in running bond or stack
bond as specified with the closed tops up. They shall be
laid in a full horizontal bed of mortar. The slots shall face
toward the room or area where sound absorption is required
as shown on the plans. Slots shall be kept free of mortar and
debris and the exposed mortar at the bottom of each slot
shall be neatly tooled. NO RAKE JOINTS.
INSTALLATION
Lighting: Provide adequate lighting for masonry work by
placing lighting at a reasonable distance from the wall for
even illumination. Do not use trough lighting.
Cutting: Make all unit cuts, including those for bonding,
holes, boxes, etc., with motor-driven masonry saws using
either an abrasive or diamond blade. Cut neatly and locate
for best appearance.
MORTAR BEDDING AND JOINTING
In all exterior mortar, we recommend using an approved
water repellent additive (which may be purchased from
manufacturer), following manufacturer’s instructions.
Consult manufacturer for recommendations.
FLASHING OF MASONRY WORK
Install flashing at locations shown in the plans and in
strict accordance with the details and the best masonry
flashing practices.
WEEP HOLES AND VENTS
Install weep holes and vents at proper intervals at courses
above grade and at any water stops over windows, doors
and beams. Consult NCMA TEK Notes, available at
www.trenwyth.com, for proper flashing and drawings.
INSPECTION
The glazed faces shall conform to the requirements of
ASTM C744 when viewed from a distance of 5 feet at right
angles to the wall with normal lighting. The concrete
masonry units on which the glaze is molded shall conform
to the requirements of ASTM C90.
The ground and grey block faces shall conform to the
requirements of ASTM C90 when viewed from a distance
of 20 feet at right angles to the wall with normal lighting.
INSTALLATION RECOMMENDATIONS
The unslotted side of Astra-Glaze-SW+/Acousta-Wal
blocks must be painted or parged to seal the porosity of
the aggregates.
The units must be laid in a full horizontal bed of mortar and
laid with the closed tops up. The slots should face toward
the noise source. Slots must be kept free of mortar. The
exposed mortar at the bottom of each slot should be neatly
tooled and all debris removed. NO RAKE JOINTS.
Under no circumstances should the units be laid upside
down; that is, with the closed tops down. First, it would be
impossible to lay the units in a full horizontal bed of mortar if
they are laid upside down. Second, excess mortar would fall
into the slots giving an unsightly appearance. If the cavity
volume were reduced by more than 5 to 10% due to mortar
falling inside, the acoustical performance of the units would
be altered.
All Trenwyth concrete masonry units are manufactured
with an integral water repellent. The admixture is mixed
through the block at time of manufacture and lasts for the
life of the product. Mortar must also be treated at the time
of installation.
To download a printable version
of these specifications, please
visit http://www.trenwyth.com.
w w w. t r e n w y t h . c o m
A W 1

Astra-Glaze-SW+ ® /Acousta-Wal
Specifications
PART 1 – GENERAL
SUBMITTAL
Submit color samples for selection from manufacturer’s
series. Submit product literature, certifications, test reports
and full-size sample(s) of each color specified or selected.
Custom colors are available. Contact your Trenwyth
representative for details.
QUALITY ASSURANCE
Certifications: All glazed sound-absorbing masonry
units shall be Astra-Glaze-SW+ ® /Acousta-Wal ® units
produced by Trenwyth manufacturer. Glazed concrete
blocks manufactured in Pennsylvania shall be lightweight
units conforming to ASTM C90. Glazed concrete
blocks manufactured in Arizona shall be medium-weight
units conforming to ASTM C90 and all applicable
Federal Specifications.
The glazed surface shall have a smooth satin-gloss finish,
externally heat-polymerized cast-on facing conforming to
ASTM C744 and all applicable Federal Specifications. All
Trenwyth units are manufactured with an approved integral
water repellent CMU admixture.
All Astra-Glaze-SW+ glazed masonry units are
manufactured with a significant amount of pre-consumer
recycled content.
Production shall be monitored so that the top of the units
are completely closed and edges of slots and ends of
blocks are straight and clean. Type IV units shall have fillers,
as supplied by manufacturer, inserted in the cavities at the
block plant. Type IV fillers shall be fiberglas fillers laminated
to metal septa. All filler material shall be cut accurately to
size and installed as recommended for the type of Astra-
Glaze-SW+/Acousta-Wal units specified. All units contain
manufacturer-approved integral water repellent admixture at
time of manufacture.
Fire Resistance: Define hourly ratings required as 1, 2, 3
or 4 hours.
Field Constructed Mock-ups: Construct a sample panel,
no less than 4' x 4', of each color and size to be used in
the project.
Manufacturer requires ordering a full-size unit to illustrate
color and texture for approval.
Manufacturer requires a jobsite sample panel be installed at
the jobsite prior to installation of any Trenwyth products.
This panel will represent both the quality of the product
and the workmanship to be expected for the project.
The panel must be approved by either the owner or the
architect for the project. Manufacturer will provide 4"
Astra-Glaze-SW+/Acousta-Wal units for a 4' x 4' sample
panel at no cost for the material (excluding freight to
the site).
DELIVERY, STORAGE AND HANDLING
Astra-Glaze-SW+/Acousta-Wal glazed sound-absorbing
units shall be delivered to the jobsite on banded pallets
with individual protective covers on each glazed soundabsorbing
block face. Keep protective block covers on
the blocks until installation. Store pallets in single stacks
on level ground and cover with waterproof covering (e.g.
tarpaulins) to protect the blocks from inclement weather.
Handle blocks carefully to avoid breakage and damage
to the finished surfaces.
PROJECT/SITE CONDITIONS:
Protection of Work: Cover walls each day after installation
to keep open walls protected and dry. After units are
installed, they should be protected from damage by other
trades performing operations that can stain or otherwise
damage the finished surfaces by covering walls with plastic.
Corners should be protected from damage after installation
by covering them with plywood.
PART II – PRODUCTS
PRODUCT NAME
Astra-Glaze-Acousta-Wal ® glazed
sound-absorbing masonry units*
* Available with recycled content.
MANUFACTURER
Anchor Concrete Products (800) 233-1924
One Connelly Road • Emigsville, PA 17318
Superlite Block (800) 331-9823
4626 N. 42nd Avenue • Phoenix, AZ 85019
RELATED MATERIALS
Colored matching or contrasting mortar is available from
manufacturer. Consult NCMA TEK Notes, available at
www.trenwyth.com, for mortar type and specifications. For
all exterior mortar, use matching manufacturer-approved
water repellent mortar additive, following manufacturer’s
instructions. Consult manufacturer for recommendations.
In areas that are exposed to excessive moisture, we
recommend joints to be raked and filled with BONSAL
B-7000 EPOXY. See Mortar Bedding and Jointing for details.
SIZES AND SHAPES
Actual facing dimensions shall be 7-3/4" x 15-3/4" forming
a 1/16" lip around the edges of a modular 7-5/8" x 15-5/8"
block. Nominal 2", 4", 6", 8" 10" and 12" standard block
thickness shall be used as required, as well as standard
and special block shapes. Basic units may include
stretchers, jambs, caps and cove bases. Please contact
manufacturer for specific size availability.
MASONRY CLEANERS
Use Custom Burnished Masonry Cleaner by PROSOCO
(dilute 1 part to 3 parts clean water), carefully following
manufacturer’s instructions. Available from manufacturer.
Do not powerwash.
Caution! The following solvents must never be used as
they may damage the Astra-Glaze-SW+/Acousta-Wal
block facings: paint remover, lacquer thinner, epoxy
thinner, methylene chloride acetone, muriatic acid.
Contact your Trenwyth representative for recommendations
for hard to clean areas.
PART 3 — EXECUTION
LAYING MASONRY WALLS
Draw blocks from more than one pallet at a time during
installation. All exterior mortar shall include Trenwythapproved
water repellent additive added to each batch in
the appropriate dosage rates for mortar type (M, S or N)
per manufacturer’s instructions. Refer to NCMA TEK Notes,
available at www.trenwyth.com, for Hot and Cold weather
construction practices.
Astra-Glaze-SW+/Acousta-Wal units shall be installed by
the general contractor or masonry contractor using the
best concrete masonry practices. Astra-Glaze-SW+
/Acousta-Wal blocks shall be laid in running bond or
stack bond as specified with the closed tops up. The
slots shall face toward the room or area where sound
absorption is required as shown on the plans. Units shall
be laid in a full horizontal bed of mortar.
Lay units using the best concrete masonry practices.
Install only quality units; reject all defective units as defined
by ASTM C744. Lay Astra-Glaze-SW+/Acousta-Wal with
the faces level, plumb and true to the line strung
horizontally at the glazed face. Units shall have uniform face
joint dimensions of 1/4" both horizontally and vertically. Tool
joints neatly after they are finger-hard to make them straight
and uniform. Size and place cut pieces appropriately to
maintain consistency and bond. Slots shall be kept free of
mortar and debris and the exposed mortar at the bottom of
each slot shall be neatly tooled. NO RAKE JOINTS
unless tuckpointing with epoxy.
INSTALLATION
Lighting: Provide adequate lighting for masonry work by
placing all lighting at a reasonable distance from the wall for
even illumination. Do not use trough lighting.
Base Course: Align base course properly on the floor slab.
Cove Base: Keep the cove base tight to the slab if vinyl
floor tile is to be installed. For thicker flooring, raise cove
base units to the desired height.
Cutting: Make all unit costs, including those for bonding,
holes, boxes, etc., with motor-driven masonry saws using
either an abrasive or diamond blade. Cut neatly and locate
for best appearance.
MORTAR BEDDING AND JOINTING
1. Lay units with full mortar coverage on head and bed
joints taking care not to block cores to be grouted or
filled with masonry insulation.
2. Tool all mortar joints when thumbprint hard into a
concave configuration.
3. Care should be taken to remove mortar from the face of
masonry units before it sets.
4. Tuckpoint the joints of scored units for proper
appearance. All exterior scored units must be
tuckpointed to prevent water penetration. Rake back the
joint when epoxy (Bonsal/Laticrete) is used on select
jobs that require better moisture prevention.
Various masonry mortars may be used with
Astra-Glaze-SW+/Acousta-Wal concrete masonry units
depending on specific structural requirements for the
finished walls. In all exterior mortar, we recommend using
the matching manufacturer-approved water repellent
mortar additive (which may be purchased from
manufacturer), following manufacturer’s instructions.
Consult manufacturer for recommendations.
EPOXY FINISHED JOINTS
In areas exposed to excessive moisture, make sure to tool
mortar joints with a minimum of 1/4" and tuckpoint with an
approved water-resistant grout. A typical tuckpointing grout
is BONSAL ® POLYMER MODIFIED SANDED TILE GROUT
mixed with the BONSAL B-7000 EPOXY. Do not add water
or anything else in addition to the B-7000, which will make
it a 100% solid enabling it to be acid and stain resistant.
Recommendations for using BONSAL ® – DO NOT
FLOAT GROUT ACROSS GLAZED SURFACE. THE
PROPER TECHNIQUE IS TO POINT OR USE A
MORTAR GUN!
FLASHING OF MASONRY WORK
Install flashing at locations shown in the plans and in
strict accordance with the details and the best masonry
flashing practices.
WEEP HOLES AND VENTS
Install weep holes and vents at proper intervals at courses
above grade and at any water stops over windows, doors
and beams. Consult NCMA TEK Notes, available at
www.trenwyth.com, for additional information on flashing.
INSPECTION
The glazed facing shall conform to the requirements of
ASTM C744 when viewed from a distance of five (5) feet at
right angles to the wall with normal lighting. The concrete
masonry units on which the glaze is molded shall conform
to the requirements of ASTM C90.
CLEANING:
Keep walls clean daily during installation using brushes or
rags and a clean damp cloth. Harsh cleaning methods after
walls have been erected may mar the surface of the blocks.
Do not allow excess mortar lumps or smears to harden on
the glazed surfaces. Remove green mortar with a dry cloth.
Do not use steel wood, sandpaper or other abrasives.
FINAL CLEANDOWN
Clean the completed walls with Burnished Custom
Masonry Cleaner by PROSOCO (dilute 1 part to
3 parts clean water), carefully following manufacturer’s
washdown instructions — including thorough rinsing. Do
not use acid or abrasives on the glazed surfaces.
w w w. t r e n w y t h . c o m
A W 2

Astra-Glaze-SW+ ® /Acousta-Wal
Specifications (cont.)
MAINTENANCE
Astra-Glaze-SW+/Acousta-Wal units, properly installed and
cleaned, need virtually no maintenance other than routine
cleaning with standard commercial grade cleaning agents
such as PINESOL ® or Fantastik ® . Graffiti, paint or dye
stains may need special cleaning methods and products,
such as Trenwyth Graffiti Wizard ® environmentally friendly
cleaner. Contact manufacturer for specific cleaning
recommendations.
INSTALLATION RECOMMENDATIONS
To ensure optimal sound-reduction performance:
• The unslotted side of Astra-Glaze-SW+/Acousta-Wal
blocks must be painted or parged to seal the porosity of
the aggregates.
• The units must be laid in a full horizontal bed of mortar.
They should be laid with the closed tops up.
• The slots should face toward the noise source (with the
exception of partitioning a small office off from a large
noisy plant area). Slots must be kept free of mortar. The
exposed mortar at the bottom of each slot should be
neatly tooled and all debris removed. NO RAKE
JOINTS unless tuckpointing with epoxy.
• Under no circumstances should the units be laid upside
down; that is, with the closed tops down. First, it would
be impossible to lay the units in a full horizontal bed of
mortar if they are laid upside down; and, second, excess
mortar would fall into the slots giving an unsightly
appearance. If the cavity volume were reduced by more
that 5 to 10% due to mortar falling inside, the acoustical
performance of the units would be altered.
GENERAL INSTALLATION RECOMMENDATIONS:
• For walls with a glazed finish on both sides, use two
single-faced units. Because masonry units are typically
installed aligning one side, the second side of double
faced units is almost invariably misaligned. Double-faced
units are not recommended. Manufacturer accepts no
responsibility for face alignment.
• For best appearance, use stack bond construction when
stack bond appearance is desired (as opposed to scored
units in running bond).
• All exterior mortar joints must contain a manufacturerapproved
water repellent mortar additive, carefully
following manufacturer’s instructions.
• For best appearance and water resistance, tuckpoint
scored joints on interior andexterior applications.
• Colored matching or contrasting mortar / epoxy is
available when using colorful Astra-Glaze-SW+/
Acousta-Wal units. Contact your Trenwyth representative
for information.
To download a printable version
of these specifications, please
visit http://www.trenwyth.com.
w w w. t r e n w y t h . c o m
A W 3

Verastone ® /Acousta-Wal
Specifications
PART 1 – GENERAL
SUBMITTAL
Submit color samples for selection from manufacturer’s
group A, B, C, D or E. Submit product literature,
certifications, test reports and full-size sample(s) of each
color specified.
QUALITY ASSURANCE
Certifications: All recycled ground face sound-absorbing
masonry units shall be Verastone ® /Acousta-Wal ® units
produced by Trenwyth manufacturers. Concrete blocks
shall conform to ASTM C90. The ground surfaces shall
have a factory-applied acrylic or water-based sealer finish.
Units shall conform to ASTM C1262 with respect to
freezing and thawing.
Production shall be monitored so that the top of the units
shall be completely closed and edges of slots and ends
of the blocks shall be straight and clean. Type IV units shall
have fillers, as supplied by manufacturer, inserted in the
cavities at the block plant. Type IV fillers shall be fiberglas
fillers laminated to metal septa. All filler material shall be cut
accurately to size and installed as recommended for the
type of Acousta-Wal units specified. All units contain
manufacturer-approved integral water repellent admixture at
time of manufacture.
Verastone contains a significant amount of pre-consumer
recycled content. Contact your Trenwyth representative
for details.
Fire Resistance: Define hourly ratings required as
1, 2, 3 or 4 hours.
Field Constructed Mock-ups: Construct a sample panel, no
less than 4' x 4', of units of each color and size to be used
in the project.
Manufacturer requires ordering a full-size unit to illustrate
color and texture for approval.
Manufacturer requires that a jobsite sample panel be
installed at the jobsite prior to installation of any Trenwyth
products. This panel will represent both the quality of the
product and the workmanship to be expected for the
project. The panel must be approved by either the owner or
the architect for the project. Manufacturer will provide 4"
units for a 4' x 4' sample panel at no cost for the material
(excluding freight to the site).
DELIVERY, STORAGE AND HANDLING
Verastone/Acousta-Wal units shall be delivered to the
jobsite on covered banded pallets with cardboard between
layers. Store pallets in single stacks on level ground and
cover with waterproof covering (e.g. tarpaulins) to protect
the blocks from inclement weather. Handle blocks carefully
to avoid breakage and damage to the finished surfaces.
PROJECT/SITE CONDITIONS:
Protection of Work: Cover walls each day after installation
to keep open walls protected and dry. After units are
installed, they should be protected from damage by other
trades performing operations that can stain or otherwise
damage the finished surfaces by covering walls with plastic.
Corners should be protected from damage after installation
by covering them with plywood.
PART II – PRODUCTS
PRODUCT NAME
Verastone ® /Acousta-Wal ® recycled ground face
sound-absorbing masonry units
MANUFACTURER
Anchor Concrete Products (800) 233-1924
Church Road • Emigsville, PA 17318
Northfield Block Company (800) 358-3003
3400 East Bungalow Road • Morris, IL 60450
RELATED MATERIALS
Colored matching or contrasting mortar is available from
manufacturer. Consult NCMA TEK Notes, available at
www.trenwyth.com, for mortar type and specifications. For
all exterior mortar, use matching manufacturer-approved
water repellent mortar additive, following manufacturer's
instructions. Consult manufacturer for recommendations.
SIZES AND SHAPES
Acousta-Wal surfaces are manufactured to provide finished
dimensions of 7-5/8" x 15-5/8" ± 1/8". Bed depth
dimensions for single face units are 3-9/16", 5-9/16", 7-
9/16", 11-9/16" ± 1/8". Two face units are 3-1/2", 5-1/2",
7-1/2", 11-1/2" ± 1/8". Please contact manufacturer for
specific size availability.
MASONRY CLEANERS
Use Burnished Custom Masonry Cleaner by PROSOCO
(dilute one part to 3 parts clean water), carefully following
manufacturer’s instructions. Available from manufacturer.
Do not powerwash.
Caution! Never use Muriatic Acid solutions on units.
PART 3 – EXECUTION
LAYING MASONRY WALLS
Draw blocks from more than one pallet at a time during
installation. All exterior mortar shall include manufacturerapproved
water repellent additive added to each batch in
the appropriate dosage rates for mortar type (M, S or N)
per manufacturer’s instructions. Refer to NCMA TEK Notes,
available at www.trenwyth.com, for Hot and Cold weather
construction practices.
Verastone/Acousta-Wal units shall be installed by
the general contractor or masonry contractor.
Verastone/Acousta-Wal blocks shall be laid in running bond
or stack bond as specified with the closed tops up. The
slots shall face toward the room or area where sound
absorption is required as shown on the plans. Units shall be
laid in a full horizontal bed of mortar.
Lay units using the best concrete masonry practices. Install
only quality units; reject all defective units as defined by
ASTM C90. Lay blocks with the faces level, plumb and true
to the line strung horizontally at the ground face. Units shall
have uniform, 3/8"-wide joints both horizontally and
vertically on the finished side of the wall. Tool joints neatly
after they are finger-hard to make them straight and
uniform. Size and place cut pieces appropriately to maintain
consistency and bond. Slots shall be kept free of mortar
and debris and the exposed mortar at the bottom of each
slot shall be neatly tooled. NO RAKE JOINTS.
INSTALLATION
Lighting: Provide adequate lighting for masonry work by
placing all lighting at a reasonable distance from the wall for
even illumination. Do not use trough lighting.
Cutting: Make all unit cuts, including those for bonding,
holes, boxes, etc., with motor-driven masonry saws using
either an abrasive or diamond blade. Cut neatly and locate
for best appearance.
MORTAR BEDDING AND JOINTING
In all exterior mortar, we recommend using an approved
water repellent additive (which may be purchased from
manufacturer), following manufacturer’s instructions.
Consult manufacturer for recommendations.
FLASHING OF MASONRY WORK
Install flashing at locations shown in the plans and
in strict accordance with the details and the best masonry
flashing practices.
WEEP HOLES AND VENTS
Install weep holes and vents at proper intervals at courses
above grade and at any water stops over windows, doors
and beams. Consult NCMA TEK Notes, available at
www.trenwyth.com, for proper flashing and drawings.
w w w. t r e n w y t h . c o m
INSPECTION
The ground faces shall conform to the requirements of
ASTM C90 when viewed from a distance of twenty (20) feet
at right angles to the wall with normal lighting.
CLEANING:
Keep walls clean daily during installation using brushes,
rags and the burlap squares supplied on the
Verastone/Acousta-Wal pallet. Do not allow excess mortar
lumps or smears to harden on the finished surfaces. Harsh
cleaning methods after walls have been erected may mar
the surface of the blocks.
FINAL CLEANDOWN
Clean the completed walls with PROSOCO Burnished
Custom Masonry Cleaner (dilute 1 part to 3 parts clean
water), strictly following the manufacturer’s instructions –
including thorough rinsing. Do not use acid or abrasives
on the finished surfaces. Failure to strictly follow
manufacturer's instructions can result in permanent
damage to the finished faces. Do not apply Burnished
Custom Masonry Cleaner with pressure spray above 50
psi. Do not powerwash.
FIELD COAT APPLICATION
For completely finished walls, a finish coat of TRENDCOAT ®
Acrylic (minimum 20% solids content) or TRENDCOAT ® WB
(water-base) is recommended. Apply to all
Verastone/Acousta-Wal walls after cleandown and
when the walls are dry. Apply evenly to cover the entire
surface without forming drips or runs. For maximum
coverage and best appearance, apply TRENDCOAT
Acrylic or TRENDCOAT WB with airless spray equipment.
Consult your Trenwyth representative for further information.
TRENDCOAT (clear, high-solids acrylic) and TRENDCOAT
WB (water-based sealer) provides moisture resistance and
helps to cover any scuffs or scratches that may occur
during handling and/or installation.
MAINTENANCE
Verastone/Acousta-Wal units, properly installed and
cleaned, need virtually no maintenance other than
routine cleaning (i.e. Pinesol or Fantastik). Tough stains
may need special cleaning methods and products such
as Trenwyth Graffiti Wizard ® environmentally friendly
cleaner. Contact manufacturer for specific
cleaning recommendations.
INSTALLATION RECOMMENDATIONS
To ensure optimal sound-reduction performance:
• The unslotted side of Verastone/Acousta-Wal blocks
must be painted or parged to seal the porosity of
the aggregates.
• The units must be laid in a full horizontal bed of mortar.
They should be laid with the closed tops up.
• The slots should face toward the noise source (with
the exception of partitioning a small office off from a
large noisy plant area). Slots must be kept free of mortar.
The exposed mortar at the bottom of each slot should
be neatly tooled and all debris removed. NO
RAKE JOINTS.
• Under no circumstances should the units be laid upside
down; that is, with the closed tops down. First, it would
be impossible to lay the units in a full horizontal bed of
mortar if they are laid upside down. Second, excess
mortar would fall into the slots giving an unsightly
appearance. If the cavity volume were reduced by more
than 5 to 10% due to mortar falling inside, the acoustical
performance of the units would be altered.
• For best appearance, use stack bond construction when
stack bond appearance is desired (as opposed to scored
units in running bond).
• A complementary or matching mortar color is
recommended when using Verastone/Acousta-Wal units.
LIMITATIONS
• The facing is not intended for use as an
impervious surface.
• Acid solutions or HCL-based cleaners should not be
used as a cleaning agent or in direct contact with
the facing.
• The facing should not be continuously exposed to
temperatures above 250º F.
To download a printable version
of these specifications, please
visit http://www.trenwyth.com.
A W 4

Trendstone ® /Acousta-Wal
Specifications
PART 1 – GENERAL
SUBMITTAL
Submit color samples for selection from manufacturer’s
group A, B, C, D or E. Submit product literature,
certifications, test reports and full-size sample(s) of each
color specified.
QUALITY ASSURANCE
Certifications: All ground face sound-absorbing masonry
units shall be Trendstone ® /Acousta-Wal ® units produced by
manufacturers. Concrete blocks shall conform to ASTM
C90. The ground surfaces shall have a factory-applied
acrylic or water-based sealer finish. Units shall conform to
ASTM C1262 with respect to freezing and thawing.
All Trenwyth products conform to ASTM E2432-05 as it
pertains to the environmental, economic and social
sustainability relative to buildings.
Production shall be monitored so that the top of the units
shall be completely closed and edges of slots and ends of
the blocks shall be straight and clean. Type IV units shall
have fillers, as supplied by manufacturer, inserted in the
cavities at the block plant. Type IV fillers shall be fiberglas
fillers laminated to metal septa. All filler material shall be cut
accurately to size and installed as recommended for the
type of Acousta-Wal units specified. All units contain
manufacturer-approved integral water repellent admixture at
time of manufacture.
Trenwyth products offer high thermal mass properties,
regional materials and low life-cycle costs. Units shall have
a tighter, smoother face. Mold and moisture resistant, units
are easy to clean (never paint or refinish). Factory-applied
water-based sealer emits low VOC’s. Available in a wide
color selection, custom colors and unique shapes and
sizes, these units are ideal for interior and exterior
applications. The structural integrity of the unit results in a
one-step, single trade installation process. Units are
distributed nationally.
Fire Resistance: Define hourly ratings required as
1, 2, 3 or 4 hours.
Field Constructed Mock-ups: Construct a sample panel, no
less than 4' x 4', of units of each color and size to be used
in the project.
Manufacturer requires ordering a full-size unit to illustrate
color and texture for approval.
Manufacturer requires that a jobsite sample panel be
installed at the jobsite prior to installation of any Trenwyth
products. This panel will represent both the quality of the
product and the workmanship to be expected for the
project. The panel must be approved by either the owner or
the architect for the project. Manufacturer will provide 4"
units for a 4' x 4' sample panel at no cost for the material
(excluding freight to the site).
DELIVERY, STORAGE AND HANDLING
Trendstone/Acousta-Wal units shall be delivered to the
jobsite on covered banded pallets with cardboard between
layers. Store pallets in single stacks on level ground and
cover with waterproof covering (e.g. tarpaulins) to protect
the blocks from inclement weather. Handle blocks carefully
to avoid breakage and damage to the finished surfaces.
PROJECT/SITE CONDITIONS:
Protection of Work: Cover walls each day after installation
to keep open walls protected and dry. After units are
installed, they should be protected from damage by other
trades performing operations that can stain or otherwise
damage the finished surfaces by covering walls with plastic.
Corners should be protected from damage after installation
by covering them with plywood.
PART II – PRODUCTS
PRODUCT NAME
Trendstone ® /Acousta-Wal ® ground face
sound-absorbing masonry units
MANUFACTURER
Anchor Concrete Products (800) 233-1924
Church Road • Emigsville, PA 17318
Northfield Block Company (800) 358-3003
3400 East Bungalow Road • Morris, IL 60450
Superlite Block (800) 331-9823
4626 N. 42nd Avenue • Phoenix, AZ 85019
RELATED MATERIALS
Colored matching or contrasting mortar is available from
manufacturer. Consult NCMA TEK Notes, available at
www.trenwyth.com, for mortar type and specifications. For
all exterior mortar, use matching manufacturer-approved
water repellent mortar additive, following manufacturer’s
instructions. Consult manufacturer for recommendations.
SIZES AND SHAPES
Acousta-Wal surfaces are manufactured to provide
finished dimensions of 7-5/8" x 15-5/8" ± 1/8". Bed depth
dimensions for single face units are 3-9/16", 5-9/16",
7-9/16", 11-9/16" ± 1/8". Two face units are 3-1/2", 5-1/2",
7-1/2", 11-1/2" ± 1/8". Please contact manufacturer for
specific size availability.
MASONRY CLEANERS
Use Burnished Custom Masonry Cleaner by PROSOCO
(dilute one part to 3 parts clean water), carefully following
manufacturer’s instructions. Available from manufacturer.
Do not powerwash.
Caution! Never use Muriatic Acid solutions on units.
PART 3 -- EXECUTION
LAYING MASONRY WALLS
Draw blocks from more than one pallet at a time during
installation. All exterior mortar shall include manufacturerapproved
water repellent additive added to each batch in
the appropriate dosage rates for mortar type (M, S or N)
per manufacturer’s instructions. Refer to NCMA TEK Notes,
available at www.trenwyth.com, for Hot and Cold weather
construction practices.
Trendstone/Acousta-Wal units shall be installed by the
general contractor or masonry contractor.
Trendstone/Acousta-Wal blocks shall be laid in running
bond or stack bond as specified with the closed tops up.
The slots shall face toward the room or area where sound
absorption is required as shown on the plans. Units shall be
laid in a full horizontal bed of mortar.
Lay units using the best concrete masonry practices. Install
only quality units; reject all defective units as defined by
ASTM C90. Lay blocks with the faces level, plumb and true
to the line strung horizontally at the ground face. Units shall
have uniform, 3/8"-wide joints both horizontally and
vertically on the finished side of the wall. Tool joints neatly
after they are finger-hard to make them straight and
uniform. Size and place cut pieces appropriately to maintain
consistency and bond. Slots shall be kept free of mortar
and debris and the exposed mortar at the bottom of each
slot shall be neatly tooled. NO RAKE JOINTS.
INSTALLATION
Lighting: Provide adequate lighting for masonry work by
placing all lighting at a reasonable distance from the wall for
even illumination. Do not use trough lighting.
Cutting: Make all unit cuts, including those for bonding,
holes, boxes, etc., with motor-driven masonry saws using
either an abrasive or diamond blade. Cut neatly and locate
for best appearance.
MORTAR BEDDING AND JOINTING
In all exterior mortar, we recommend using an approved
water repellent additive (which may be purchased from
manufacturer), following manufacturer’s instructions.
Consult manufacturer for recommendations.
FLASHING OF MASONRY WORK
Install flashing at locations shown in the plans and in
strict accordance with the details and the best masonry
flashing practices.
WEEP HOLES AND VENTS
Install weep holes and vents at proper intervals at courses
above grade and at any water stops over windows, doors
and beams. Consult NCMA TEK Notes, available at
www.trenwyth.com, for proper flashing and drawings.
INSPECTION
The ground faces shall conform to the requirements of
ASTM C90 when viewed from a distance of twenty (20) feet
at right angles to the wall with normal lighting.
CLEANING:
Keep walls clean daily during installation using brushes,
rags and the burlap squares supplied on the
Trendstone/Acousta-Wal pallet. Do not allow excess mortar
lumps or smears to harden on the finished surfaces. Harsh
cleaning methods after walls have been erected may mar
the surface of the blocks.
FINAL CLEANDOWN
Clean the completed walls with PROSOCO Burnished
Custom Masonry Cleaner (dilute 1 part to 3 parts clean
water), strictly following the manufacturer's instructions –
including thorough rinsing. Do not use acid or abrasives on
the finished surfaces. Failure to strictly follow
manufacturer's instructions can result in permanent
damage to the finished faces. Do not apply Burnished
Custom Masonry Cleaner with pressure spray above 50
psi. Do not powerwash.
FIELD COAT APPLICATION
For completely finished walls, a finish coat of TRENDCOAT ®
Acrylic (minimum 20% solids content) or TRENDCOAT ® WB
(water-base) is recommended. Apply to all
Verastone/Acousta-Wal walls after cleandown and
when the walls are dry. Apply evenly to cover the entire
surface without forming drips or runs. For maximum
coverage and best appearance, apply TRENDCOAT
Acrylic or TRENDCOAT WB with airless spray equipment.
Consult your Trenwyth representative for further information.
TRENDCOAT (clear, high-solids acrylic) and TRENDCOAT
WB (water-based sealer) provides moisture resistance and
helps to cover any scuffs or scratches that may occur
during handling and/or installation.
MAINTENANCE
Trendstone/Acousta-Wal units, properly installed and
cleaned, need virtually no maintenance other than routine
cleaning (i.e. Pinesol or Fantastik). Tough stains may need
special cleaning methods and products such as Trenwyth
Graffiti Wizard ® environmentally friendly cleaner. Contact
manufacturer for specific cleaning recommendations.
INSTALLATION RECOMMENDATIONS
To ensure optimal sound-reduction performance:
• The unslotted side of Trendstone/Acousta-Wal
blocks must be painted or parged to seal the porosity
of the aggregates.
• The units must be laid in a full horizontal bed of mortar.
They should be laid with the closed tops up.
• The slots should face toward the noise source (with the
exception of partitioning a small office off from a large
noisy plant area). Slots must be kept free of mortar. The
exposed mortar at the bottom of each slot should be
neatly tooled and all debris removed. NO RAKE
JOINTS unless tuckpointing with epoxy.
• Under no circumstances should the units be laid upside
down; that is, with the closed tops down. First, it would
be impossible to lay the units in a full horizontal bed of
mortar if they are laid upside down. Second, excess
mortar would fall into the slots giving an unsightly
appearance. If the cavity volume were reduced by more
than 5 to 10% due to mortar falling inside, the acoustical
performance of the units would be altered.
• For best appearance, use stack bond construction when
stack bond appearance is desired (as opposed to scored
units in running bond).
• A complementary or matching mortar color is
recommended when using Trendstone/Acousta-Wal units.
LIMITATIONS
• The facing is not intended for use as an
impervious surface.
• Acid solutions or HCL-based cleaners should not
be used as a cleaning agent or in direct contact
with the facing.
• The facing should not be continuously exposed to
temperatures above 250º F.
To download a printable version
of these specifications, please
visit http://www.trenwyth.com.
w w w. t r e n w y t h . c o m
A W 5

architectural masonry units
Sound Absorption
Coefficients
Acousta-Wal ®
SOUND ABSORPTION COEFFICIENTS OF GENERAL BUILDING MATERIALS AND FURNISHINGS
Complete tables of coefficients of the various materials that normally constitute the interior finish of rooms
may be found in the various books on architectural acoustics. The following short list will be useful in
making simple calculations of the reverberation in rooms.
MATERIALS
COEFFICIENTS
125cps. 250cps. 500cps. 1000cps. 2000cps. 4000cps.
Brick, unglazed .03 .03 .03 .04 .05 .07
Brick, unglazed, painted .01 .01 .02 .02 .02 .03
Carpet, heavy, on concrete .02 .06 .14 .37 .60 .65
Same, on 40 oz. hairfelt or foam rubber .08 .24 .57 .69 .71 .73
Same, with impermeable latex backing
on 40 oz. hairfelt or foam rubber .08 .27 .39 .34 .48 .63
Concrete block, coarse .36 .44 .31 .29 .39 .25
Concrete block, painted .10 .05 .06 .07 .09 .08
Fabrics
Light velour, 10 oz. per sq. yd., hung
straight, in contact with wall .03 .04 .11 .17 .24 .35
Medium velour, 10 oz. per sq. yd.,
draped to half area .07 .31 .49 .75 .70 .60
Heavy velour, 18 oz. per sq. yd.,
draped to half area .14 .35 .55 .72. 70 .65
Floors
Concrete or terrazzo .01 .01 .015 .02 .02 .02
Linoleum, asphalt, rubber or
cork tile on concrete .02 .03 .03 .03 .03 .02
Wood .15 .11 .10 .07 .06 .07
Wood parquet in asphalt on concrete .04 .04 .07 .06 .06 .07
Glass
Large panes of heavy plate glass .18 .06 .04 .03 .02 .02
Ordinary window glass .35 .25 .18 .12 .07 .04
Gypsum board, 1/2" nailed to 2 x 4"s 16" o.c. .29 .10 .05 .04 .07 .09
Marble or glazed tile .01 .01 .01 .01 .02 .02
Openings
Stage, depending on furnishings .25 — .75
Deep balcony, upholstered seats .50 — 1.00
Grills, ventilating .15 — .50
Plaster, gypsum or lime, smooth
finish on tile or brick .013 .015 .02 .03 .04 .05
Plaster, gypsum or lime, rough finish on lath
Same, with smooth finish
.02
.02
Plywood paneling, 3/8" thick .28 .22 .17 .09 .10 .11
Water surface, e.g. swimming pool .008 .008 .013 .015 .020 .025
Air, sabins per 1000 cubic feet 2.3 7.2
.03
.02
.04
.03
.05
.04
.04
.04
.03
.03
w w w. t r e n w y t h . c o m
A W 6

R-Values
Acousta-Wal ®
architectural masonry units
R-values of concrete masonry walls are correlated to concrete density, since thermal conductivity of
concrete increases with increasing density. The following tables list a range of R-values for each density.
Contact your Trenwyth representative for specific block densities.
Table 2 — R-Values For 6 in. (152 mm) Concrete Masonry Walls, hr . ft 2.o F/Btu a
Cores filled with:
Density of
concrete
Cores empty
Perlite
Loose-fill insulation
Vermiculite
Polyurethane
foamed insulation
Solid grouted
Construction
Exposed
block, both
sides
pcf range mid range mid range mid range mid range mid
85 2.2-2.5 2.4 4.8-6.1 5.3 4.5-5.6 5.0 5.2-7.0 5.9 1.6-1.8 1.7
95 2.1-2.4 2.2 4.1-5.4 4.6 3.9-5.0 4.3 4.4-6.1 5.0 1.5-1.7 1.6
105 2.0-2.2 2.1 3.5-4.8 4.0 3.3-4.5 3.8 3.7-5.2 4.3 1.4-1.6 1.5
115 1.8-2.1 2.0 3.0-4.2 3.4 2.9-4.0 3.3 3.1-4.5 3.6 1.4-1.5 1.4
125 1.7-2.0 1.8 2.5-3.7 3.0 2.5-3.5 2.9 2.6-3.9 3.1 1.3-1.5 1.4
135 1.6-1.9 1.7 2.2-3.2 2.6 2.2-3.1 2.5 2.2-3.4 2.7 1.3-1.4 1.3
Table 3 — R-Values For 8 in. (203 mm) Concrete Masonry Walls, hr . ft 2.o F/Btu a
Cores filled with:
Density of
concrete
Cores empty
Perlite
Loose-fill insulation
Vermiculite
Polyurethane
foamed insulation
Solid grouted
Construction
Exposed
block, both
sides
pcf range mid range mid range mid range mid range mid
85 2.4-2.7 2.5 6.3-8.2 7.1 5.9-7.5 6.6 6.9-9.4 8.0 1.9-2.1 2.0
95 2.3-2.6 2.4 5.3-7.2 6.1 5.0-6.7 5.7 5.8-8.1 6.7 1.7-2.0 1.8
105 2.1-2.4 2.2 4.5-6.3 5.2 4.3-5.9 4.9 4.8-7.0 5.6 1.6-1.9 1.7
115 2.0-2.3 2.1 3.8-5.5 4.4 3.7-5.2 4.3 4.0-6.0 4.7 1.5-1.8 1.6
125 1.9-2.2 2.0 3.2-4.8 3.8 3.1-4.6 3.7 3.3-5.1 4.0 1.5-1.7 1.5
135 1.7-2.1 1.9 2.7-4.2 3.3 2.7-4.0 3.2 2.8-4.4 3.4 1.4-1.6 1.5
w w w. t r e n w y t h . c o m
A W 7

R-Values
Acousta-Wal ®
architectural masonry units
Table 4 — R-Values For 10 in. (254 mm) Concrete Masonry Walls, hr . ft 2.o F/Btu a
Cores filled with:
Density of
concrete
Cores empty
Perlite
Loose-fill insulation
Vermiculite
Polyurethane
foamed insulation
Solid grouted
Construction
Exposed
block, both
sides
pcf range mid range mid range mid range mid range mid
85 2.5-2.9 2.7 7.5-9.9 8.5 7.0-9.1 7.9 8.2-11.3 9.5 2.1-2.4 2.2
95 2.4-2.7 2.5 6.3-8.7 7.2 6.0-8.0 6.8 6.7-9.7 7.9 1.9-2.2 2.0
105 2.2-2.5 2.3 5.2-7.5 6.1 5.0-7.0 5.8 5.5-8.2 6.6 1.8-2.1 1.9
115 2.1-2.4 2.2 4.4-6.5 5.2 4.2-6.2 5.0 4.6-7.0 5.5 1.7-2.0 1.8
125 1.9-2.3 2.1 3.7-5.6 4.4 3.6-5.4 4.3 3.8-6.0 4.6 1.6-1.9 1.7
135 1.8-2.1 2.0 3.1-4.9 3.7 3.0-4.7 3.6 3.2-5.1 3.9 1.5-1.8 1.6
Table 5 — R-Values For 12 in. (305 mm) Concrete Masonry Walls, hr . ft 2.o F/Btu a
Cores filled with:
Density of
concrete
Cores empty
Perlite
Loose-fill insulation
Vermiculite
Polyurethane
foamed insulation
Solid grouted
Construction
Exposed
block, both
sides
pcf range mid range mid range mid range mid range mid
85 2.6-3.0 2.8 9.1-12.1 10.3 8.5-11.0 9.6 10.0-13.8 11.5 2.3-2.6 2.4
95 2.4-2.8 2.6 7.6-10.5 8.8 7.2-9.7 8.2 8.2-11.8 9.6 2.1-2.4 2.3
105 2.3-2.6 2.4 6.3-9.1 7.4 6.0-8.5 7.0 6.7-10.0 8.0 2.0-2.3 2.1
115 2.1-2.5 2.3 5.2-7.9 6.2 5.1-7.4 6.0 5.5-8.5 6.6 1.9-2.2 2.0
125 2.0-2.3 2.2 4.4-6.8 5.3 4.2-6.5 5.1 4.5-7.2 5.5 1.8-2.0 1.9
135 1.9-2.2 2.0 3.6-5.8 4.4 3.6-5.6 4.3 3.7-6.1 4.6 1.7-1.9 1.8
Information based on data published by the National Concrete Masonry Association. See NCMA TEK Note
6-2A, available at www.trenwyth.com.
w w w. t r e n w y t h . c o m
A W 8

R-Values
Acousta-Wal ®
architectural masonry units
Additional r-values can be achieved with factoryinstalled
expanded polystyrene, such as Korfil or
ICON inserts.
Korfil ® Block Insulation inserts are individually
molded expanded polystyrene inserts. Installed at
your Trenwyth manufacturing facility, Korfil insulation
inserts are designed to fit standard two-core
masonry units. Korfil inserts are available in 6", 8",
10" and 12" widths.
R-Values
Both Korfil and ICON inserts offer your building the
following benefits:
• One-step installation of insulated masonry block
saves time and money.
• R-value unaffected by moisture or aging
• Insulated block offers up to a 4-hour fire rating
• Improves dew point and sound transmission
resistance
• Offers space for easy installation of utilities
within wall
• Flame retardant polystyrene
• Use with single-wythe and cavity
wall construction
• No maintenance required
• Available in 6", 8", 10" and 12" widths.
Caution: Expanded Korfil polystyrene should not be
exposed to temperatures exceeding 184ºF.
Applicable Standards:
• ASTM C578 Specification for Rigid Cellular
Polystyrene Thermal Insulation
• ASTM C90 Standard Specification for
Loadbearing Concrete Masonry Units
ICON ® Universal Concrete Block Insulation
Inserts are molded from expandable polystyrene.
Pre-fit at your Trenwyth manufacturing facility, ICON
inserts are designed to compress and fit the core of
all masonry units and significantly improve cmu
thermal efficiency.
w w w. t r e n w y t h . c o m
A W 9

R-Values
Acousta-Wal ®
architectural masonry units
6" Two-Core Masonry Unit
Density of
Cores Empty Cores Insulated
Block - lbs/ft 9 R t U R t U
80 2.64 .38 6.45 .16
95 2.42 .41 5.39 .19
105 2.29 .44 4.76 .21
115 2.17 .46 4.21 .24
125 2.05 .49 3.69 .27
135 1.95 .51 3.25 .31
12" Two-Core Masonry Unit
Density of
Cores Empty Cores Insulated
Block - lbs/ft 9 R t U R t U
80 3.12 .32 9.38 .11
95 2.83 .35 8.09 .12
105 2.66 .38 7.27 .14
115 2.52 .40 6.51 .15
125 2.38 .42 5.78 .17
135 2.26 .44 5.11 .20
8" Two-Core Masonry Unit
Density of
Cores Empty Cores Insulated
Block - lbs/ft 9 R t U R t U
80 2.86 .35 7.74 .13
95 2.61 .38 6.55 .15
105 2.46 .41 5.83 .17
115 2.33 .43 5.17 .19
125 2.21 .45 4.56 .22
135 2.10 .48 4.01 .25
12" Cavity Wall, 4" Outer Wythe,
3/4 Air Space, 8" Two-Core Block
Density of
Cores Empty Cores Insulated
Block - lbs/ft 9 R t U R t U
80 4.26 .23 9.14 .11
95 4.01 .25 7.95 .13
105 3.86 .26 7.23 .14
115 3.73 .27 6.57 .15
125 3.61 .28 5.96 .17
135 3.50 .29 5.41 .28
10" Two-Core Masonry Unit
Density of
Cores Empty Cores Insulated
Block - lbs/ft 9 R t U R t U
80 3.00 .33 8.52 .12
95 2.73 .37 7.25 .14
The r-values and u-values are based on
information provided by insert manufacturer,
CBIS. Values are based on ASHRAE and
NCMA publications.
For more information, contact your Trenwyth
representative or visit www.cbisinc.com.
105 2.57 .39 6.48 .15
115 2.43 .41 5.76 .17
125 2.31 .43 5.09 .20
135 2.19 .46 4.48 .22
w w w. t r e n w y t h . c o m
A W 1 0

architectural masonry units
Noise Reduction
Coefficients
Acousta-Wal ®
Acousta-Wall units absorb sound at all frequencies. However, they are especially effective for absorbing
unwanted sounds at difficult-to-control low frequencies.
Noise Reduction Coefficient Chart
FREQUENCY – HERTZ
SIZE TYPE SURFACE 125 250 500 1000 2000 4000 NRC*
4" I Painted .18 .82 .40 .35 .43 .36 .50
6" I Painted .63 .80 .41 .40 .31 .51 .50
4" IV Painted .21 .78 .97 .80 .68 .73 .80
6" IV Painted .31 1.23 .71 .71 .65 .68 .85
8" IVRF Painted .21 .78 .97 .80 .68 .73 .80
10" IVRF Painted .21 .78 .97 .80 .68 .73 .80
12" IVRF Painted .31 1.23 .71 .71 .65 .68 .85
*NRC – approximate percentage of sound absorbed.
w w w. t r e n w y t h . c o m
A W 1 1

architectural masonry units
Sound Transmission
Comparisons
Acousta-Wal ®
SOUND TRANSMISSION CLASS
Approximate Sound Transmission Class (STC) ratings for Trenwyth Acousta-Wal ® units as compared
to ratings for other units are shown below.
Acousta-Wal ®
Masonry Units
Regular
Lightweight CMU
4" 49
6" 52 6" 43
8" 56 8" 46
12" 62 12" 51
A 12" Type I RF Acousta-Wal ® unit will absorb 62 decibels of sound (laid facing the origin of the sound).
Therefore, if there is a sound of 105 decibels reaching the wall, 62 decibels will be absorbed by the wall and
43 decibels will go through the wall to the other side.
TYPICAL SOUND LEVELS (IN DECIBELS)
Threshold of audibility 0
Rustle of leaves in gentle breeze 10
Average whisper 4 feet away 20
Soft radio in apartment; average residence 35
Average office 45
Moderate restaurant background 50
Noisy office or department store 55
Average busy street 60
Stenographic room 70
City subway 80
Loud automobile horn 23 feet away 100
Express train passsing at high speed 105
Threshold of feeling (varies with frequency) 120
Threshold of painful sounds; limit of ear's endurance 130
Near jet engine 160
w w w. t r e n w y t h . c o m
A W 1 2

architectural masonry units
Block Characteristics/
Fire Ratings
Acousta-Wal ®
Fire resistance ratings can be calculated using a method that multiplies the percent of solid material in the
concrete masonry unit by the actual thickness (in inches) of the blocks to determine the hourly rating for the
type of aggregate used. Contact your Trenwyth representative for specific fire ratings.
FIRE RESISTANCE RATINGS/MINIMUM REQUIRED EQUIVALENT INCHES
Aggregate Type in
The Concrete Masonry Unit
Fire Resistance
0.5 Hr. 0.75 Hr. 1 Hr. 1.5 Hr. 2 Hr. 3 Hr. 4 Hr.
Calcareous or siliceous gravel 2.0 in. 2.4 in. 2.8 in. 3.6 in. 4.2 in. 5.3 in. 6.2 in.
Limestone, cinders or slag 1.9 in. 2.3 in. 2.7 in. 3.4 in. 4.0 in. 5.0 in. 5.9 in.
Expanded clay, shale or slate 1.8 in. 2.2 in. 2.6 in. 3.3 in. 3.6 in. 4.4 in. 5.1 in.
Expanded slag or pumice 1.5 in. 1.9 in. 2.1 in. 2.7 in. 3.2 in. 4.0 in. 4.7 in.
Calculating "Equivalent Thickness" is simply determining what the block thickness would be if the same
amount of material contained in a hollow unit were re-molded without core holes.
Nominal Width
(Inches)
EQUIVALENT THICKNESS OF CONCRETE MASONRY UNITS (IN INCHES)
Based on Typical
Hollow Units (1)
Equivalent Thickness
Based on Percent Solid
(75% - semi-solid) (100% - solid)
4 2.68 (73.8%) 2.72 3.625
6 3.09 (55.0%) 4.22 5.625
8 4.04 (53.0%) 5.72 7.625
10 4.98 (51.7%) 7.22 9.625
12 5.77 (49.6%) 8.72 11.625
CALCULATING ESTIMATED FIRE RESISTANCE EXAMPLE
An 8" hollow masonry wall is constructed of expanded slag units reported to be 53%* solid. What is the
estimated fire resistance of the wall (modular units)?
Equivalent Thickness = % solid x depth
Example: .53 x 7.625 in. = 4.04 inches
From Table: 3 hr. Fire Resistance requires 4.0 inches
*Percentage solid can be calculated from net area or net volume as determined by ASTM C140
“Methods of Testing Concrete Masonry Units”.
(1) Information based on data published by the National Concrete Masonry Association in NCMA TEK 7-1A,
available at www.trenwyth.com.
w w w. t r e n w y t h . c o m
A W 1 3

architectural masonry units
Block Characteristics/
Fire Ratings
Acousta-Wal ®
Fire resistance ratings can be calculated using a method that multiplies the percent of solid material in the
concrete masonry unit by the actual thickness (in inches) of the blocks to determine the hourly rating for the
type of aggregate used. Contact your Trenwyth representative for specific fire ratings.
FIRE RESISTANCE RATINGS/MINIMUM REQUIRED EQUIVALENT INCHES
Aggregate Type in
The Concrete Masonry Unit
Fire Resistance
0.5 Hr. 0.75 Hr. 1 Hr. 1.5 Hr. 2 Hr. 3 Hr. 4 Hr.
Calcareous or siliceous gravel 2.0 in. 2.4 in. 2.8 in. 3.6 in. 4.2 in. 5.3 in. 6.2 in.
Limestone, cinders or slag 1.9 in. 2.3 in. 2.7 in. 3.4 in. 4.0 in. 5.0 in. 5.9 in.
Expanded clay, shale or slate 1.8 in. 2.2 in. 2.6 in. 3.3 in. 3.6 in. 4.4 in. 5.1 in.
Expanded slag or pumice 1.5 in. 1.9 in. 2.1 in. 2.7 in. 3.2 in. 4.0 in. 4.7 in.
Calculating "Equivalent Thickness" is simply determining what the block thickness would be if the same
amount of material contained in a hollow unit were re-molded without core holes.
Nominal Width
(Inches)
EQUIVALENT THICKNESS OF CONCRETE MASONRY UNITS (IN INCHES)
Based on Typical
Hollow Units (1)
Equivalent Thickness
Based on Percent Solid
(75% - semi-solid) (100% - solid)
4 2.68 (73.8%) 2.72 3.625
6 3.09 (55.0%) 4.22 5.625
8 4.04 (53.0%) 5.72 7.625
10 4.98 (51.7%) 7.22 9.625
12 5.77 (49.6%) 8.72 11.625
CALCULATING ESTIMATED FIRE RESISTANCE EXAMPLE
An 8" hollow masonry wall is constructed of expanded slag units reported to be 53%* solid. What is the
estimated fire resistance of the wall (modular units)?
Equivalent Thickness = % solid x depth
Example: .53 x 7.625 in. = 4.04 inches
From Table: 3 hr. Fire Resistance requires 4.0 inches
*Percentage solid can be calculated from net area or net volume as determined by ASTM C140
“Methods of Testing Concrete Masonry Units”.
(1) Information based on data published by the National Concrete Masonry Association in NCMA TEK 7-1A,
available at www.trenwyth.com.
w w w. t r e n w y t h . c o m
A W 1 3

Applications
Acousta-Wal ®
architectural masonry units
SCHOOLS:
Gymnasiums
Swimming pools
Auditoriums
Music rooms (practice, band, choral)
Mechanical equipment rooms
Cafeterias
INDUSTRIAL PLANTS:
Noisy plant areas
Partitions between noisy and quiet plant areas
Partitions between plant and office areas
Outdoor noise screens (to protect neighbors)
CHURCHES:
Naves and Transcepts
Social halls
Classrooms
ELECTRIC UTILITIES:
Outdoor transformer noise screens
Generator rooms
GENERAL:
Computer rooms
Cooling tower noise screens
Newspaper press rooms
Textile mill weave rooms
Engine test cells
Recreation halls
Bowling alleys
Skating rinks
Convention centers
Field houses
Car wash facilities
Shooting ranges
Return air shafts
Aircraft maintenance and overhaul hangers
Telephone company mechanical rooms,
standby generator facilities
Hospital mechanical, business and utility areas
Vocational (shop) rooms
Multi-purpose rooms
Lecture rooms
Corridors and classrooms
Boiler rooms
Mechanical equipment rooms
Boiler rooms
Fan rooms
Engine exhaust stacks
Chapels
Mechanical equipment rooms
Fan rooms
Boiler rooms
Shipyard facilities
Airport facilities
Subways and subway stations
Tunnels
Sewage treatment plants
Coliseums
Laboratories
Highway noise screens
Teletype rooms
Radio and television studios
Theaters
Restaurants
w w w. t r e n w y t h . c o m
A W 1 4

Applications
Acousta-Wal ®
architectural masonry units
EXAMPLE: SCHOOL APPLICATION
Many schools are built with a small gymnasium which is frequently fitted with a temporary stage and also
used as an auditorium. Such a room, having mostly sound reflective surfaces (such as wood floor, block
walls, glass windows and steel or concrete roof-deck), will not be good acoustically. Reverberation time will
be high. The voice of an instructor, the music of an orchestra, the sound of feet running will bounce off the
walls without being absorbed and will come back to the ears of the audience as unwanted noise a few
seconds after the initial sound is heard.
For example, a room 60' x 80' x 25' high, finished as above and with an assumed maximum audience of
600 persons, will have reverberation time at 500 Hertz of 6.6 seconds empty and 2.1 seconds with the
maximum audience present. The optimum reverberation time for a school auditorium of this size is about 1.2
seconds at 500 Hertz. If the room is to be used for speeches only, the optimum reverberation time is even
less or about 0.9 seconds. This means hearing conditions will be very poor with a small group in the room
and only fair with a capacity audience. This tends to discourage full use of the room.
If this room is treated with 8" x 8" x 16" Type IV Acousta-Wal blocks, using the total available area of the
walls above 7'-0" door height and allowing for 1,400 sq. ft. of windows, the result will be as follows:
Reverberation on Times at 500 Hertz
Original Room
Room wih 3,640 sq. ft.
8" Type IV Acousta-Wal
blocks
Empty Room 6.6 seconds 2.10 seconds
Maximum Audience 1.8 seconds 1.14 seconds
With this treatment, the room would be fair to good with a small audience (usually seated close to the
speaker) and reverberation time would reach its optimum value at 500 Hertz with the maximum audience of
600 people present. There would be quite a significant difference in the performance of the room with and
without the Acousta-Wal treatment.
If Type I 4" x 8" x 16" Acousta-Wal units are used, the reverberation times at 500 Hertz will be 2.3 seconds
empty and 1.21 seconds with 600 people present. While this is not quite as close to the desired time with
small audiences, the room would still be considered very satisfactory by most schools.
w w w. t r e n w y t h . c o m
A W 1 5

architectural masonry units
Frequently Asked
Questions
Acousta-Wal ®
1. How do Acousta-Wal blocks work?
Unlike acoustical ceilings, Acousta-Wal blocks do not operate on the principle of porosity. The basic
operating principle is the Helmholtz resonator. Every cavity has a frequency to which it is sympathetic
(called the resonant frequency). Examples of this would be an opera singer breaking a glass by singing a
note at its resonant frequency or a bell ringing at its resonant frequency when it is struck. It is as if the
cavity captures and absorbs the sound waves at or near its resonant frequency. These sounds are then
dissipated in the structure. The Helmholtz resonator principle is not new. It is used in internal
combustion engine mufflers and was used in ancient amphitheaters where bottles were built into the
walls to absorb unwanted sound.
2. What does NRC stand for?
NRC stands for Noise Reduction Coefficient. NRC is the average of absorption readings obtained at
four frequencies: 250, 500, 1000 and 2000 Hertz (Hz). For example, a reading of .85 at 250 Hz. means
that 85% of the sound striking the Acousta-Wal surface at this frequency (250 Hz.) is absorbed and,
therefore, not reflected back into the room as unwanted noise. It is customary and useful to take
readings at 125 and 4000 Hz. even though they are not used to calculate NRC. Although NRC is a
convenient measure of a product’s acoustical performance, it is something of a “shotgun” approach and
should not be depended upon when choosing sound absorbing materials for a specific application.
3. Is it structural?
Yes. Acousta-Wal blocks are manufactured to meet ASTM C90 or C129. The slots are more than
compensated for by the added strength and lateral stability provided by the closed tops.
4. What is the fire rating?
Comparable sound absorbing blocks gave the following results when tested.
6" Type I ............2 hours
6" Type IV ..........2 hours
8" Type IVRF......4 hours
5. What do the fillers do? Are they for insulation?
No, they are not for insulation. They absorb high frequency sound without diminishing the low frequency
absorption and, therefore, broaden the response of the units.
6. Does Acousta-Wal cause a maintenance problem?
This is one of the most commonly asked questions. Walls constructed with Acousta-Wal blocks actually
require much less maintenance than walls faced with other acoustical materials. This is particularly true
when Astra-Glaze-SW ® +/Acousta-Wal glazed acoustical units are used. When dust or dirt settles in the
slots, it can be removed easily with a vacuum cleaner. Neither the fibrous filler or the individual fibers will
be disturbed.
7. If water gets into the block cavities, how can it be removed?
Because the Acousta-Wal blocks are laid with the open ends of the slot down and the closed tops of
the blocks up, any water that enters the cavities quickly drains out.
w w w. t r e n w y t h . c o m
A W 1 6

architectural masonry units
Frequently Asked
Questions
Acousta-Wal ®
8. Will moisture affect the fibrous fillers or cause any adverse effects, such as deterioration of
the filler or a loss in the acoustical properties?
No, because fibrous glass is an inorganic material it will not deteriorate, rot or mildew. The sound
absorption of Acousta-Wal blocks would be adversely affected only if water completely filled the fibrous
glass. This is unlikely because the pad must be immersed completely in water and work like a sponge
to reach the saturation limit. The filler can hold no more than 20% of its own weight. Since the filler used
in an 8" Type IV Acousta-Wal block cavity weighs only about 6/100 of a pound, the water it could hold,
if saturated, would amount to about 1/8 of cubic inch per cavity and would evaporate to dryness in a
relatively short time.
9. Can the blocks be painted without disturbing their sound absorption value?
Yes. However, if the units are left unpainted, the sound absorption at the high frequencies (above 1000
Hz) would be slightly improved depending upon the surface texture of the unit (porosity). The sound
absorption at the low frequency would be unchanged since the units function on the Helmholtz
resonator principle, as described in Question 1.
10. What type of unit should I use on my job?
The type of application controls the choice. In installations where there will be adequate high frequency
absorption provided by other materials such as an acoustical ceiling, upholstered seats or draperies,
Type I would be adequate. In applications, where both low and high frequency absorption are desired,
e.g. multi-purpose rooms, gymnasiums, and music rooms, Type IV units provide the best results. In
specialized applications such as electrical generating stations and transformer noise screens, 8" Type I
is particularly effective because its peak absorption occurs at the same frequency as the noise
generated by these devices.
Whenever possible get an octave band analysis of the noise. Then it is a relatively simple matter to
select the unit giving the greatest absorption (See Page AW 6, Sound Absorption Coefficients, behind
this tab) at the frequencies with the highest decibel readings. For complicated applications, contact your
Trenwyth representative. Rule of thumb:
Low Frequency Absorption Only Type I or Type IV
Low and High Absorption
Type IV
11. What is the Sound Transmission Loss of Acousta-Wal blocks?
It is critically important to remember the difference between sound absorption and sound transmission
loss. Sound absorption is a measure of the sound absorbed in the same room in which the sound is
generated. Sound transmission is a measure of sound transmitted from one room into an adjacent
room. Sound transmission loss is measured in decibels. The sound transmission class of a material is
determined by comparing the measured sound transmission loss of the material at various frequencies
to the response of the human ear at the same frequencies.
w w w. t r e n w y t h . c o m
A W 1 7

architectural masonry units
Frequently Asked
Questions
Acousta-Wal ®
Sound Transmission Class (STC)
6" ordinary 2-core block STC 43
6" Type I Acousta-Wal STC 49
6" Type IV Acousta-Wal STC 52
As you can see, Acousta-Wal blocks give superior sound transmission loss performance when
compared to ordinary hollow concrete masonry units of the same thickness and composition. To ensure
good sound transmission loss performance, (1) the unslotted side of the units must be painted or
parged to seal the porosity of the aggregate, and (2) the units must be laid in a full horizontal bed of
mortar. This same procedure must also be followed when using ordinary concrete masonry units when
good sound transmission loss is important.
12. Does it matter where I place the units in the room?
In schools and public buildings, the units should be kept above door height. The slots must always face
the noise source. In an auditorium, sound absorption is most desirable at the rear. When partitioning off
an office or a control room from an existing noisy plant area, the slots should face into the office. In
addition to the sound transmission loss provided by the units (when properly installed in a full horizontal
bed of mortar), noise which enters the room through the doors, windows or ceiling will then be subject
to absorption by the Acousta-Wal blocks.
13. Are there any special instructions I should give the masons regarding the laying
up of the units?
The units should be laid in a full horizontal bed of mortar. They should be laid with the closed tops up.
The slots should face toward the noise source (with the exception of partitioning a small office off from a
large noisy plant area). Under no circumstances should the units be laid upside down, that is;
with the closed tops down. First of all, it would be impossible to lay the units in a full horizontal bed of
mortar if they are laid upside down. Second, excess mortar would drip into the slots giving an unsightly
appearance. Third , if the cavity volume were reduced by more than 5 to 10% due to mortar dripping
inside, the acoustical performance of the units would be altered.
14. What is the delivery time for Acousta-Wal ® blocks?
In most cases, grey block will be available within two to three weeks. For finished block, call your
Trenwyth representative for lead time.
15. How can you have a Sound Absorption Coefficient of greater than 1.00 e.g. 6" Type IV
Acousta-Wal ® shows a coefficient of 1.23 at 500 Hz.?
This is an anomaly that occurs when the resonant frequency of the Acousta-Wal ® block cavities occur at
or near the test frequencies. The standard used in ASTM C423 is that 100% of sound is absorbed by
an open window (and the test equipment is calibrated accordingly). ASTM also requires that the
readings shown on the test instruments be recorded exactly -- even though common sense dictates
that more than 100% of any sound cannot be absorbed.
w w w. t r e n w y t h . c o m
A W 1 8

Acoustical Analysis
Acousta-Wal ®
architectural masonry units
As a service to our customers, Trenwyth offers an acoustical analysis of any space which a
customer believes may require acoustical correction.
In order to complete the calculations for this study, the following information is required:
Project Name :
________________________________________________________________
Architect : ____________________________________________________________________
Dimensions of the room:
Height (ft.): __________________________ (include drawing if ceiling height varies)
Length (ft.): __________________________
Width (ft.): __________________________
Volume of the room (cu. ft.):______________________________________________
Materials and Square Footage:
Floor Material: ______________________ Square Feet __________________
Ceiling Material: ____________________ Square Feet __________________
Wall Material: ________________________ Square Feet __________________
Door Material: ______________________ Square Feet __________________
Windows: __________________________ Square Feet __________________
Other:
If you are using any acoustical material with non-standard NRC ratings, please list the
material and the NRC rating below.
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
Fax this form to Trenwyth Acousta-Wal Plant Manager at (717) 767-1622
An electronic Acoustical Analysis form is available in the Acousta-Wal ® section of our website,
www.trenwyth.com.
w w w. t r e n w y t h . c o m
A W 1 9

architectural masonry unıts
helpful information
about control joints, alignment, mortar,
field coating, maintenance and design, etc.

04
Thanks for your interest in Trenwyth high-end architectural concrete masonry units.
If you need further information, don’t hesitate to contact one of our sales offices listed on
the back cover of this binder or email Trenwyth at info@trenwyth.com.
architectural masonry units
www.trenwyth.com

Table of Contents
General Information
architectural masonry units
Control Joints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GI 1 – 3
Design Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GI 4
Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GI 5
Mortar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GI 6 – 7
Detailing to Keep Moisture Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GI 8 – 17
Basic Block Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GI 18 – 22
Graffiti Wizard ® Literature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TR2812
TRENDCOAT ® and TRENDCOAT ® WB Field Coat Literature . . . . . . . . . . . . . . . . . . . . TR2813
The Dry Block System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N/A
Cleaning Products . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GI 23 – 24
w w w. t r e n w y t h . c o m
G I T O C

This page intentionally left blank

Control Joints
General Information
architectural masonry units
Ladder Type Joint
Reinforcement
8" C.M.U.
4" PRAIRIE
stone unit
Adjustable Eye and
Pintle Anchor
4" Ladder
Type Joint
Reinforcement
Control Joint Detail
As with any concrete masonry unit, Trenwyth units should be
reinforced properly. Control joints are recommended
approximately every 20 feet.
Continuous horizontal joint reinforcement is recommended in the
exterior wythe every 16 inches or every course with 12 inch and
16 inch high units.
DESIGN CRITERIA
Control Joints should be no more than 20' apart.
Location of Control Joint:
• Approx. 4'-6' from corners.
• All inside corners, especially at wall piers/columns.
• At the corner/side of any large opening or window
(If openings are over 6', locate at both sides.
4" horizontal joint reinforcing wire installed every 16" O.C.
When using 12" or 16" tall units, install every course.
This will greatly reduce or eliminate shrinkage or movement that create hairline cracks.
Use Trenwyth-approved integral water repellent additive in the mortar.
Use “Type N” mortar.
Type S mortar is too brittle and may create hairline shrinkage cracks.
Rake and caulk all window sill and coping unit head joints.
EMPIRICAL CRACK CONTROL CRITERIA
For walls without openings or other points of stress concentration, control joints are used to effectively
divide a wall into a series of isolated panels. Table 1 (see Page GI 2) lists recommended maximum spacing
of these control joints based on empirical criteria. This criteria has been developed based on successful,
historical performance over many years in various geographical conditions. The empirical method is the
most commonly used method and is applicable to most building types. An engineered method is presented
in NCMA TEK Notes, 10-3 Control Joints for Concrete Masonry Walls - Alternative Engineered Method
(ref. 1), available at www.trenwyth.com. It is generally used only when unusual conditions are encountered
such as dark colored units in climates with large temperature variable.
w w w. t r e n w y t h . c o m
G I 1

Control Joints
General Information
architectural masonry units
Table 1 - Recommended Control Joint Spacing for
Above Grade Exposed Concrete Masonry Walls*
Distance between joints should not exceed the lesser of:
Length to height ratio
or ft (m)
1 1/2 25 (7.62)
*Notes:
1. Table values are based on the use of horizontal reinforcement having an
equivalent area of not less than 0.025 in. 2 /ft (52.9mm 2 /m) of height to
keep unplanned cracks closed.
2. Criteria applies to all concrete masonry units.
3. This criteria is based on experience over a wide geographical area.
Control joint spacing should be adjusted up or down where local
experience justifies but no further than 25 ft (7.62m).
FOR MORE INFORMATION ON CONTROL JOINTS, SEE NCMA TEK NOTES:
10-2B Control Joints for Concrete Masonry Walls-Empirical Method
CONTROL JOINTS FOR CONCRETE MASONRY WALLS
Concrete masonry is a popular construction material because its inherent attributes satisfy the diverse needs
of both exterior and interior walls. While these attributes are the primary basis for concrete masonry’s
popularity, performance should not be taken for granted. Like all construction systems, design decisions
significantly influence field performance of the concrete masonry wall system. Proper application of crack
control measures, including control joints when required, can help ensure satisfactory performance of the
concrete masonry.
Control joints are one method used to relieve horizontal tensile stresses due to shrinkage of the concrete
masonry units, mortar and, when used, grout. They are essentially vertical separations built into the wall
at locations where stress concentrations may occur. These joints reduce restraint and permit
longitudinal movement.
Potential cracking resulting from externally applied design loads due to wind, soil pressure, seismic forces or
differential settlement of foundations is controlled by limiting the design stress in allowable stress design or
by providing adequate strength when strength design is used. These design considerations are not covered
here. Where external loads are an issue in combination with internal volume change, the design should
consider the combined effects of these influences on cracking.
w w w. t r e n w y t h . c o m
G I 2

Control Joints
General Information
architectural masonry units
CONTROL JOINT PLACEMENT
When required, control joints should be located where volume changes in the masonry due to drying
shrinkage, carbonation or temperature changes are likely to create tension in the masonry that will exceed
its capacity. In practice, this can be difficult to determine, but several methods are presented in the following
sections to provide guidance in locating control joints.
In addition, care should be taken to provide joints at locations of stress concentrations
such as (see Figure 1 below):
1. at changes in wall height,
2. at changes in wall thickness, such as at pipe and duct chases and pilasters,
3. at movement joints in foundations and floors,
4. at movement joints in roofs and floors that bear on a wall,
5. near one or both sides of door and window openings. (Generally, a control joint is placed at one
side of an opening less than 6 ft (1.83 m) wide and at both jambs of openings over 6 ft (1.83 m)
wide. Control joints can be away from the opening if adequate tensile reinforcement is placed
above, below and beside wall openings.)
6. adjacent to corners of walls or intersections within a distance equal to half the control
joint spacing.
w w w. t r e n w y t h . c o m
G I 3

architectural masonry units
Design
Recommendations
General Information
Stacked Bond
1. The architectural appeal is a change in appearance from the traditional running bond.
2. The close dimensional tolerance provided with Trenwyth units allows the mason to lay precise stacked
bond design.
3. Because of the close dimensional tolerance of Trenwyth units, many contractors will lay stacked bond.
Scored units
1. Choice of proper scale is often very important to an architect. Variation from the standard 8" x 16" face
size is sometimes desired.
2. Scored units provide a wide selection of patterns, in addition to reduction in scale — many of which are
a departure from the appearance of the rectangle.
3. As desired by the architect, emphasis can be placed horizontally or vertically through scoring patterns
(such as the 4" x 16" scored or 2" x 16" scored units, laid soldier course).
4. Special pattern effects, departing completely from traditional masonry appearance, are available.
5. Superior results on scored jobs will be obtained if the natural joints are raked as the job progresses and
all joints, natural and scored, are grouted or pointed together. NO RAKE JOINTS.
Vertical (Soldier) Coursing
1. The architectural appeal lies in the change in appearance from the usual horizontally coursed running
bond wall. It is welcomed by many designers as a departure from the more traditional rectangle.
2. The closed end units, available with standard 4" and 6" blocks and 8" pilaster blocks, provide a solid
and flat mortar bed which easily accommodates the laying of Trenwyth units in vertical coursing, either
in stacked bond or running bond.
3. Keep in mind that the compressive strength of hollow concrete units vertically coursed is approximately
78% of the strength horizontally coursed. The loadbearing characteristics of the wall must be designed
accordingly. (Solid units have the same compressive strength either way.)
w w w. t r e n w y t h . c o m
G I 4

Alignment
General Information
architectural masonry units
Alignment
Proper alignment of masonry materials is most important to the appearance of a finished masonry wall.
Masonry materials invariably course differently due to their size and to the size of the mortar joints.
Therefore, it is of the utmost importance that a proper layout be prepared by the masonry foreman prior to
the installation.
If the face of a masonry wall involves different masonry products, it is necessary for the foreman to know the
exact sizes of each of the products in order to properly make bond when doing the layout.
If the joint requirements for one of the products is 1/4" and for another is 3/8", this must be taken into
consideration when laying out the first course. If it is not, the resulting finished wall will have unsightly
misaligned vertical joints.
Example:
Astra-Glaze-SW+ ® units are specified in the wainscot of a corridor with Trendstone Plus ® blocks above that
point. Units have a single center score and the wall is in running bond.
The difficulty in holding a correct running bond is due to aligning the 3/8" joints of the Trendstone Plus units
properly over the 1/4" joints of the Astra-Glaze-SW+ units.
Astra-Glaze-SW+ units must be laid using face joints of 1/4" both vertically and horizontally. The Trendstone
Plus units being laid on top must be centered over the 1/4" joints of the Astra-Glaze-SW+ units which are in
place. See detail below:
3/8"
1/4"
5/16"
w w w. t r e n w y t h . c o m
G I 5

Mortar
General Information
architectural masonry units
The most common mortar used with our products is made with standard bagged masonry cement. This
mortar may be one of four types—M, S, N or O. Each type of mortar has different characteristics primarily
suited to bond or strengthen the mortar and is usually specified in the project architectural specifications.
These mortars may also be colored.
Note: Two air-entertaining materials shall not be combined in mortar.
Mortar
Cement-Lime
Masonry
Cement
Table 1: Proportion Specification Requirements
Proportions by Volume (Cementitious Materials)
Type
Portland Cement or Masonry Cement Hydrated Lime
Blended Cement M S N or Lime Putty
M 1 ____ ____ ____ 1/4
S 1 ____ ____ ____ over 1/4 to 1/2
N 1 ____ ____ ____ over 1/2 to 1 1/4
O 1 ____ ____ ____ over 1 1/4 to 2 1/2
M 1 ____ ____ 1
M ____ 1 ____ ____
S 1/2 ____ ____ 1
S ____ ____ 1 ____
N ____ ____ ____ 1
O ____ ____ ____ 1
Aggregate Ratio (Measured
in damp, loose conditions)
Not less than 2 1/4 and not
more than 3 times the sum of
the separate volumes of
cementitious materials
Some mason contractors use job mixed mortar that consists of cement and lime. This is acceptable for use
with all Trenwyth products.
Table 2: Property Specification Requirements B
Mortar
Cement-Lime
Masonry Cement
Type
Average Compressive Strength
at 28 days, min. psi (MPa)
Water Retention
Minimum %
Air Content
Maximum %
M 2500 (1.72) 75 12
S 1800 (12.4) 75 12
N 750 (5.2) 75 14 A
O 350 (2.4) 75 14 A
M 2500 (1.72) 75 18
S 1800 (12.4) 75 18
N 750 (5.2) 75 20 C
O 350 (2.4) 75 20 C
Aggregate Ratio (Measured
in damp, loose conditions)
Not less than 2 1/4 and
not more than 3 times the
sum of the separate
volumes of cementitious
materials
(A)
(B)
(C)
Laboratory prepared mortar only.
When structural reinforcement is incorporated in cement-lime mortar,
the maximum air content shall be 12%.
When structural reinforcement is incorporated in masonry cement
mortar, the maximum air content shall be 18%.
Consult NCMA TEK Notes relating to mortar for additional information.
w w w. t r e n w y t h . c o m
G I 6

Mortar
General Information
architectural masonry units
There are more sophisticated mortars that have additives such as latex, plasticizers or other products
to harden and/or make the mortar more workable or change some other characteristics. These too may
be used with Trenwyth products if specified but must be handled with greater care, following the
manufacturers instructions.
Epoxy Mortar
Certain mortars are very difficult to work with because of their high bond strength and adhesive
characteristics. One of these is epoxy mortar. Unless the work is kept very clean during the laying process,
the finished wall may be extremely difficult to clean. For this reason we recommend careful installation of
epoxy mortars as any cleaner strong enough to clean hardened epoxy may damage the glazed block facing.
Follow manufacturer's instructions diligently.
Exterior Applications
All exterior mortar joints must contain a manufacturer-approved water repellent additive.
Importance of Cleaning Walls Daily
The single most important factor when laying glazed masonry units to assure a clean finished wall is to keep
the walls clean during construction by bagging (wiping the wall with burlap to remove excess mortar) or
brushing. The final cleandown will then be a relatively simple procedure.
Mortar Gun
The easiest and most effective way to tuckpoint mortar joints is to use a mortar gun. The alternative,
a baker’s bag, is harder to work with and makes an even application of mortar difficult. The ceramic
tile method of smearing grout all over the face should not be used because of damage caused to the
glazed face.
See NCMA TEK Notes on Mortar for Concrete Masonry.
w w w. t r e n w y t h . c o m
G I 7

architectural masonry units
Detailing to Keep
Moisture Out
General Information
Mortar Bedding and Jointing:
1. Lay units with full mortar coverage on head and bed joints taking care not to block cores to be grouted
or filled with masonry insulation.
2. Tool all mortar joints when thumbprint hard into a concave configuration.
3. Care should be taken to remove mortar containing manufacturer-approved water repellent admixture
from the face of masonry units before it sets.
4. Tuckpoint the joints of scored units for proper appearance. All exterior scored units must be
tuckpointed to prevent water penetration. NO RAKE JOINTS
Precast, Concrete,
Metal or Stone Cap
Through-Wall with
Protruding Drip Lip
Proper Lapping of Flashing
and Counter Flashing
2" Unobstructed Airspace
Flashing with Drip Lip Sufficiently
Protruding to Direct Water out of and
away from Mortar Joint and Wall
Continous Vapor Barrier on
Warm Side of Cavity
Scored Unit
or Half-Block
Unit
Weep Joints or Weep Vents 1/4"
Wide Spaced at 32" O.C.
Immediately Above Flashing
Sill Block or
Chamfered Unit
Flashing with
Protruding Drip Lip
Flashing
Weep Joints or Weep Vents 1/4"
Wide Spaced at 32" O.C.
Immediately Above Flashing
w w w. t r e n w y t h . c o m
G I 8

architectural masonry units
Detailing to Keep
Moisture Out
General Information
Window System
Exterior Sill
with Drip
Interior Window Stool
Weep Holes — Spaced 32" O.C.,
Located Immediately Above
Flashing, thru Mortar, 3/8" Wide
Flashing
Metal Wall Coping
Roofing System
Flashing
Precast Roof System
Weep Holes — Spaced 32" O.C.,
Located Immediately Above
Flashing, thru Mortar, 3/8" Wide
Continuous Bond Beam
w w w. t r e n w y t h . c o m
G I 9

architectural masonry units
Detailing to Keep
Moisture Out
General Information
Exterior
Interior
Flashing
Weep Holes — Spaced 32"
O.C., Located Immediately
Above Flashing, thru
Mortar, 3/8" Wide
Bond Beam/
Precast Lintel
Window/Door
System
w w w. t r e n w y t h . c o m
G I 1 0

architectural masonry units
Detailing to Keep
Moisture Out
General Information
Thru-Wall Flashing
Weep Holes — Spaced 32"
O.C., Located Immediately
Above Flashing, thru
Mortar, 3/8" Wide
Floor System
Exterior
Grade
Concrete
Foundation
Cavity or Insulation
Weep Holes — Spaced 32"
O.C., Located Immediately
Above Flashing, thru
Mortar, 3/8" Wide
Floor System
Flashing
Concrete
Foundation
w w w. t r e n w y t h . c o m
G I 1 1

architectural masonry units
Detailing to Keep
Moisture Out
General Information
Exterior
Interior
Weep Holes — Spaced 32" O.C.,
Located Immediately Above
Flashing, thru Mortar, 3/8" Wide
Steel Beam Lintel
Flashing with Drip
Window/Door System
Exterior
Interior
Weep Holes — Spaced 32" O.C.,
Located Immediately Above
Flashing, thru Mortar, 3/8" Wide
Steel Angle/Bond Beam Lintel
Flashing with Drip
Door Frame/Window
System
w w w. t r e n w y t h . c o m
G I 1 2

architectural masonry units
Detailing to Keep
Moisture Out
General Information
Roofing System
Metal Fascia
Flashing
Weep Holes — Spaced 32" O.C.,
Located Immediately Above
Flashing, thru Mortar, 3/8" Wide
Continuous Bond Beam
Steel Joist Metal
Decking Roof System
Flashing
Weep Holes — Spaced 32" O.C.,
Located Immediately Above
Flashing, thru Mortar, 3/8" Wide
Counter Flashing
Roofing System
Continuous Bond Beam
Steel Joist Metal Decking
Roof System
w w w. t r e n w y t h . c o m
G I 1 3

architectural masonry units
Detailing to Keep
Moisture Out
General Information
Stone Wall Coping
Thru-Wall Flashing
Flashing
Weep Holes — Spaced 32" O.C., Located
Immediately Above Flashing, thru Mortar,
3/8" Wide
Counter-Flashing
Roofing System
Flashing
Weep Holes — Spaced
32" O.C., Located
Immediately Above
Flashing, thru
Mortar, 3/8" Wide
Steel Joist/Metal
Deck Roof System
Continuous
Bond Beam
w w w. t r e n w y t h . c o m
G I 1 4

architectural masonry units
Detailing to Keep
Moisture Out
General Information
Proper design, detailing and installation of cap
flashing is necessary to help assure weather-tight
concrete masonry construction. This article presents
four common wall/roof conditions and provides
guidance and explanation for various techniques of
proper cap flashing design.
1. Concrete Masonry Units: Smooth or molded
textures and split textures. For split face or split
ribbed concrete masonry construction (Fig. 3)
use of a compressible membrane (Note 13).
2. Sealant joint: Use durable sealants such as
polysulphide, polyurethane or epoxy based
sealants. Sealant may be omitted if the fascia or
clip-on caps (Notes 7 or 19) extend at least four
inches below the top of the top concrete
masonry unit (Figs. 1 & 3). Applying sealants at
the face of split faced or split ribbed units is
difficult and can be avoided by properly installing
fascia, caps and compressible membranes
(notes 7 or 19 and note 13) or by using a
band of smooth textured concrete masonry
units at the top of the wall.
7
fascia
6
8
cant
9
retainer
strip
10
roof
paver
11
insulation
nailers
5
membrane
4
fastener
3
reglet
2
sealant
1
units
18
mesh
16
grout
17
13
compressible
membrane
14
anchor
joint
reinforcement
15
reinforcement
12
deck
Figure 1
w w w. t r e n w y t h . c o m
G I 1 5

architectural masonry units
Detailing to Keep
Moisture Out
General Information
3. Reglet: Position the bottom of the reglet at
least four inches below the top of the concrete
masonry or provide a sealant joint (Note 2). It is
preferable that in areas subjected to wind
driven rains that the cap material extend at
least four inches below the top of the top
masonry unit—not four inches from the top of
the cap. One may anticipate in wind driven
rains an upward movement of water one
inch at each ten mile an hour increment of
wind velocity.
4. Fastener: Mechanically fasten reglet to the
wall. Place fasteners for reglets as close to the
bottom of the reglet as possible. Mechanically
fastening the reglet to the wall and clipping the
cap or fascia material to the reglet reduces
buckling problems that may occur if the fascia
or cap material is mechanically fastened directly
to the masonry. Install neoprene washers to
seal fasteners.
5. Single ply roofing membrane: Lap over the
top of the cant and extend the membrane to
no more than two inches from the bottom of
the reglet.
6. Nailers or Blocking: Nailers or Blocking to be
treated wood.
(Notes 7 through 12 refer to Figure 1 only)
7. Fascia: The fascia should have a mechanical
or friction fit to the cant and a friction clip-on
fit to the reglet. Joints in the length of
fascia should be capped at least six inches
and sealed.
8. Cant: Metal or plastic cants to be configured
as required.
9. Retainer strip: A non-ferrous strip is provided
to restrain roof pavers against wind uplift forces.
10. Roof pavers: Roof pavers are a ballast
alternative to loose gravel. Interlocking roof
pavers provide wind up-lift resistance, drainage,
wearing surface and protection for the roofing
membrane against ultra-violet degradation.
11. Rigid board insulation: Provide as required.
4
0 fastener
3
19
cap
reglet
2
sealant
2
units
smooth
16
grout
20
slope
20
nailers
2
sealant
13
compressible
membrane
14
anchor
bolts
15
reinforcement
19
cap
4
fastener
3
reglet
2
units, split faced
or split ribbed
20
slope
20
nailers
13
compressible
membrane
14
anchor
bolts
2
sealant
15
reinforcement
15
joint
reinforcement
Figure 2
16
grout
15
joint
reinforcement
Figure 3
w w w. t r e n w y t h . c o m
G I 1 6

architectural masonry units
Detailing to Keep
Moisture Out
General Information
12. Deck: The deck is usually metal or concrete,
configured and designed to resist bearing
as required.
13. Compressible water resistance membrane:
Extend three quarters of an inch onto the face
shells of the concrete masonry and adhere to
the masonry. The membrane may be omitted if
sealant joints (Note 2) are properly installed and
maintained. The membrane is required, however,
when capping split faced or split ribbed
masonry and when the fascia does not extend
at least four inches over the face of the smooth
textured units
14. Anchor bolts: Space and embed, as required.
15. Reinforcement: Provide horizontal and/or
vertical steel reinforcement as required.
16. Grout: Provide as required.
17. Horizontal joint reinforcement: Provide as
required. Avoid placing joint reinforcement
and flashing or other membranes in the same
bed joints.
18. Building fabric or mesh: Provide as required
to confine grout to the grout space.
19. Clip-on cap: Joints in the length of the cap to
be lapped at least six inches and sealed.
20. Cap slope: Slope to the roof side of the wall to
minimize staining on the face of the wall. Most
staining is caused by debris and dirt deposited
on the cap and washed off onto the wall during
light rains.
(Notes 21 through 24 refer to Figure 4 only):
21. Drip: Drips should be provided at least one half
inch from the face of the concrete masonry.
22. Epoxy joint: Caps may be fastened by
epoxying the caps to anchor bolts, by
epoxy with mechanical fastener or by a
dovetail connection.
23. Caps: Seal head joints between units. Proper
sealing may require raking out mortar joints
and applying an effective sealant (see Note 2).
Caps may be concrete masonry, stone or
precast concrete.
22
epoxy
21
drip
2
sealant
20
slope
23
cap
2
sealant
24
flashing
24. Flashing: Lap joints of metal or plastic flashing
installed under the cap at least six inches and
seal all joints. The flashing requires a drip. A
sealant (Note 2) is required if a compressible
membrane (Note 13) is omitted. Seal around
anchor bolt penetrations through the flashing.
1
counter-sunk
anchor bolt
units
14
anchor
bolts
c
17
mesh
16
grout
F
dovetail anchor
17
joint
reinforcement
Figure 4
w w w. t r e n w y t h . c o m
G I 1 7

architectural masonry units
Basic Block
Dimensions
General Information
3 5/8" Square Core
15 5/8"
1 " 1"
1"
3 8
5 / "
1"
15 5/8"
7 8
5 / "
11 5/8"
1 " 1" 1"
1"
3 8
5 / "
1"
7 5 / 8 "
7 5 / 8 "
7 5 / 8 "
3 8
5 / "
5 5/8" Reinforced Web
15 5/8"
1 " 1" 1"
1"
5 8
1"
5 / "
1 4
15 5/8"
1"
1
3 / " "
1"
5 8
1"
5 / "
7 5 / 8 "
7 5 / 8 "
5 5/8" Reinforced Web
1 5/16"
15 5/8"
1 1/4"
1 5/16"
1 1/4" 1 1/4"
5 8
5 / "
15 5/8"
1 17/32" 1 17/32"
5 8
5 / "
3 3 / 4 "
7 5 / 8 "
2 1 / 8 "
7 5 / 8 "
w w w. t r e n w y t h . c o m
G I 1 8

architectural masonry units
Basic Block
Dimensions
General Information
7 5/8" Reinforced Web
15 5/8"
1 " 1" 1"
1 4
1 / "
7 8
5 / "
1 4
1 / "
1 4
1 / "
15 5/8"
1"
1 4
1 / "
1 4
1 / "
7 8
5 / "
1 4
1 / "
1 4
3 / "
15 5/8"
7 /8"
1 4
1 / "
1 4
1 / "
7 8
5 / "
1 4
1 / "
3 3 / 4 "
7 5 / 8 "
7 5 / 8 "
7 5 / 8 "
1 16
5 / "
15 5/8"
1 4
1 / "
1 16
5 / "
1 16
5 / "
7 8
5 / "
1 16
5 / "
15 5/8"
1 8
5 / "
7 8
5 / "
1 8
5 / "
7 5 / 8 "
2 1 / 8 "
7 5 / 8 "
9 5/8" Reinforced Web
15 5/8"
1 " 1" 1"
1 4
1 / "
9 8
5 / "
1 4
1 / "
1 4
1 / "
15 5/8"
1"
1 4
1 / "
1 4
1 / "
9 8
5 / "
1 4
1 / "
15 5/8"
1 2
1 / "
1 2
1 / "
7 8
5 / "
1 / "
1 2
7 5 / 8 "
7 5 / 8 "
2 1 / 8 "
7 5 / 8 "
w w w. t r e n w y t h . c o m
G I 1 9

architectural masonry units
Basic Block
Dimensions
General Information
Bond Beam units are offered in 3 different standard shapes. Not all shapes are available for all applications.
Please specify the shape you will require when you place your order. If no preference is specified we will
manufacture the standard shapes for that unit.
KNOCK OUT BOND BEAM
(KOBB), open bottom
available in 6" and 8" units
FHA (KOBB with a solid bottom)
available in 8" units only
Note: This is the standard configuration for all 8”
bond bean units if no preference is specified.
15 5/8"
1 16 1 4
5 / "
1 / "
1 16
5 / "
1 16
5 / "
7 8
5 / "
1 16
5 / "
1 16
15 5/8"
1 4
5 / " 1 / " 15 / 16 "
1 16
5 / "
7 8
5 / "
1 16
5 / "
3 3 / 4 "
7 5 / 8 "
3 3 / 4 "
7 5 / 8 "
V-SHAPE-Cut
available in any size
Note: The unit is used for any units which are
finished on the bottom (excluding glazed units)
in order to achieve the
best quality finish.
15 5/8"
1 8
5 / "
7 8
5 / "
1 8
5 / "
2 1 / 8 "
7 5 / 8 "
SPECIALS
Trenwyth products are available in specialty units which no one else can provide. If you
have a special need, contact your Trenwyth representative.
w w w. t r e n w y t h . c o m
G I 2 0

architectural masonry units
Basic Block
Dimensions
General Information
Open Ended Bond Beams
Also available in 4", 6", 10" & 12" thickness.
Available from the Phoenix, AZ facility only.
OE1E
8" x 8" x 16"
7 5 /8"
7 5 /8"
15 5 /8"
DCBB OE1E
8" x 8" x 16"
7 5 /8"
7 5 /8"
15 5 /8"
DCBB OE1E
8" x 8" x 16"
7 5 /8"
7 5 /8"
15 5 /8"
w w w. t r e n w y t h . c o m
G I 2 1

architectural masonry units
Basic Block
Dimensions
General Information
1 16
5 / "
15 5/8"
1 4
1 / "
1 16
5 / "
1 2
1 / "
1 8
5 / "
1 2
1 / "
1 4
3 / "
15 5/8"
1"
1 16
5 / "
1 2
1 / "
1 8
5 / "
1 2
1 / "
2 1 / 8 "
7 5 / 8 "
7 5 / 8 "
15 5/8"
1 8
5 / "
1 8
1 8
5 / "
5 / "
1 8
5 / "
1 16
5 / "
15 5/8"
1 4
1 / "
1 16
5 / "
1 2
1 / "
1 8
5 / "
1 2
1 / "
7 5 / 8 "
3 3 / 4 "
7 5 / 8 "
15 5/8"
1 8
5 / "
7 5 / 8 "
15 5/8"
3 8
5 / "
7 5 / 8 "
15 5/8"
5 8
5 / "
7 5 / 8 "
15 5/8"
7 8
5 / "
7 5 / 8 "
Lintel
Scored Face
15 5/8"
1 8
5 / "
15 5/8"
7 8
5 / "
7 5 / 8 "
7 5 / 8 "
w w w. t r e n w y t h . c o m
G I 2 2

Graffiti Wizard ®
Environmentally friendly graffiti remover Graffiti Wizard ®
environmentally friendly
Non-Toxic
Biodegradable
Water Soluble
cleaner easily removes
most paints and
permanent markers,
varnish, glue, crayon,
oil, grease, etc.
Graffiti Wizard’s high-viscosity is ideal
for use on walls and other vertical
surfaces. Recommended for use
on Trenwyth Astra-Glaze-SW+ ®
glazed concrete masonry units,
Verastone ® Plus recycled filled and
polished units as well as Trendstone
Plus ® filled and polished concrete
masonry units. Graffiti Wizard is
also recommended for use on
brick, concrete, mortar, wood,
glass, metal and tile.
Graffiti Wizard is easy to use. Simply
apply Graffiti Wizard using a brush or
cloth. Let stand 10 seconds to 20
minutes, depending on the severity
of the stain. If using a more porous
or textured surface, use of a nonmetallic
stiff bristle brush may be
required. Wipe off with a damp cloth.
After the stain is removed, neutralize
the surface with water making sure
that all of the Graffiti Wizard is
removed from the surface.
Available in 4 oz., 16 oz., 1 gallon
and 5 gallon containers. Graffiti Wizard
is distributed by manufacturers of
Trenwyth products. To order, call
Trenwyth (800-233-1924).
Graffiti is easily removed.
Contact us for
a Box Lunch
Presentation
© 2008 Trenwyth • Printed in the USA • TR2812
architectural masonry units
www.trenwyth.com

This page intentionally left blank

Breathable Resistance for
Trenwyth Architectural
Concrete Masonry Units
TRENDCOAT ® water resistant sealer is a 100% liquid
membrane acrylic polymer that protects and enhances the
finish of Trenwyth Verastone ® , Verastone ® Plus, Trendstone ®
and Trendstone Plus ® architectural concrete masonry units.
TRENDCOAT provides a full-gloss, smooth moistureresistant
finish that accentuates the beauty of the natural
aggregates within the integrally-colored concrete block.
Impervious to liquids, yet
vapor and air permeable TRENDCOAT
boasts breathable resistance.
A high-quality, high-solids non-yellowing clear masonry
sealer specifically formulated for field coating, TRENDCOAT
protects the finish from the damaging affects of air pollution,
sun and extreme weather (including water, alkalis, acids and
ultraviolet light) and offers excellent graffiti resistance on
Trenwyth filled and polished units. TRENDCOAT aids in
covering any scuffs or scratches that may occur during
handling or installation.
• Water resistant/vapor and air permeable.
• Full-gloss finish will not blush.
• Meets all state and federal VOC requirements.
• Low film build application – 5 wet mils max.
• Quick air drying – dry to the touch in 10 to 15 min.
• Applied by spray, brush or roller.
TRENDCOAT ® WB (water-based) may be used in lieu of
TRENDCOAT as some interior applications may require waterbased
coating material. TRENDCOAT WB provides the same
benefits as TRENDCOAT but may not provide the rich gloss
achieved by using TRENDCOAT.
www.trenwyth.com
architectural masonry units

Field Coat Application
For completely finished walls, a finish
coat of proprietary TRENDCOAT ®
acrylic or TRENDCOAT ® WB (waterbased)
is reccomended. TRENDCOAT
and TRENDCOAT WB are ready to use
and require no mixing or dilution. Apply
to all Trenwyth Verastone ® , Verastone ®
Plus, Trendstone ® and Trendstone
Plus ® walls after cleandown when the
walls are clean and completely dry and
when the temperature is above 55º F.
All washdown activities for removal of
mortar paste must be completed prior
to application of TRENDCOAT or
TRENDCOAT WB. New mortar or
adjacent concrete must cure for a
minimum of 7 days prior to application.
Always produce a sample area of the
TRENDCOAT or TRENDCOAT WB
finish for architect/owner approval prior
to applying the finish coat to the entire
surface. Upon approval, apply the
acrylic evenly to cover the entire
surface without forming drips or runs.
For maximum coverage and best
appearance, apply TRENDCOAT or
TRENDCOAT WB with airless spray
equipment. The surface must be
completely covered. TRENDCOAT
can also be applied using a brush,
roller or long nap applicator. Clean
tools with Xylene immediately after
use. Keep container tightly closed
when not in use.
TECHNICAL INFORMATION
TRENDCOAT ®
High-solids acrylic masonry sealer
TRENDCOAT ® WB
Water-based masonry sealer
Coverage 265 sq ft./gal. @ 1.0 dry mil 563 sq ft./gal. @ 1.0 dry mill
Normal Cure Time 70º F – 50% RH: 10 min. 5-7 days for complete cure.
Dry to touch in 10-15 min.
Solids Content 16.5% 35%
Weight Solids 20% 38%
VOC 357.88 g/L solids 151.85 g/L (minus water)
175.54 g/L solids
Environmentally Most states Most states
Compliant
Low HAPS Below 1% HAPS-free
Weight per Gallon 7.49 lbs./gal. 8.71 lbs./gal.
Flammable Yes * No (Flash Point: 212° F)
Gloss Full gloss Full Gloss
* Use only in well-ventilated or open areas. Keep away from extreme heat or open flame.
Avoid breathing vapors, prolonged and repeated contact with skin and contact with eyes.
TRENDCOAT ® Performance Testing
Applied to Trenwyth Verastone ® , Verastone ® Plus, Trendstone ® and Trendstone Plus ® air-dried
masonry units, TRENDCOAT has been subjected to the following agents/chemicals:
Test/Agent Duration Test Result
Graffiti Wizard ® 1 hour No effect. No damage to TRENDCOAT.
10% solution 3 hours No effect. No damage to TRENDCOAT.
Hydrochloric acid
Water 24 hours No effect. No damage to TRENDCOAT.
Hydrogen peroxide 24 hours No effect. No damage to TRENDCOAT.
Motor oil 24 hours No effect. No damage to TRENDCOAT.
Vegetable oil 24 hours No effect. No damage to TRENDCOAT.
Formula 409 ® 24 hours No effect. No damage to TRENDCOAT.
Magic marker 4 days Formula 409 removed mark. No damage to TRENDCOAT.
#2 pencil 4 days Formula 409 removed mark. No damage to TRENDCOAT.
Lanolin 4 days Formula 409 removed mark. No damage to TRENDCOAT.
Carbon paper 4 days Formula 409 removed mark. No damage to TRENDCOAT.
Crosshatch adhesion
Acetic Acid 5% 24 Hours No effect.
100% adhesion (independent laboratory testing)
architectural masonry units
www.trenwyth.com
©2008 Trenwyth • Printed in the USA • TR2813

Cleaning Products
General Information
architectural masonry units
DRY-BLOCK II Mortar Admixture
Manufactured by W. R. Grace, DRY-BLOCK admixture improves workability and hardened mortar
properties including increased bond strength. Call for pricing by the drum.
Sure Klean® Custom Masonry Cleaner
Manufactured by PROSOCO, Sure Klean® Custom Masonry Cleaner removes concrete
splashes, excess mortar, mud, retarders, heavy efflorescence, embedded stains, rust and
surface soiling from textured custom masonry surfaces. Can be used on Split Face block.
Sure Klean® Burnished Custom Masonry Cleaner
Manufactured by PROSOCO, Sure Klean® Burnished Custom Masonry Cleaner removes
common construction and atmospheric staining from custom masonry and other architectural
concrete surfaces. This general-purpose, nonetching acidic cleaner removes rust, mud, oil,
atmospheric dirt, mortar smears and other stains without altering the surface texture. Burnished
Custom Masonry Cleaner adds depth to colors, brightens white matrices and exposed aggregate.
Can be used on Verastone, Verastone Plus, Trendstone, Trendstone Plus, Verastone Textured and Mesastone.
Sure Klean® Custom Masonry Sealer
Manufactured by PROSOCO, Sure Klean® Custom Masonry Sealer is a clear, solvent-based
silicone elastomer formulated to weatherproof custom masonry units, cast stone, architectural
concrete block, precast concrete, wood and porous masonry without altering the natural
appearance. Custom Masonry Sealer penetrates and fills pores to prevent water penetration through
exterior walls exposed to normal weathering. Can be used on Split Face, Verastone Textured and
Mesastone. Can be used on Verastone or Trendstone for a matte finish. Does not highlight the
aggregate or blend colors on Verastone or Trendstone.
Siloxane WB
Manufactured by PROSOCO, Sure Klean® Weather Seal Siloxane WB concentrate is a
self-emulsifying water repellent concentrate designed for dilution with fresh water at the
jobsite. This solvent-free blend of silanes and oligomeric alkoxysiloxanes mixes easily with
water to produce a penetrating water repellent ideal for application to dense or porous masonry
surfaces. Weather Seal Siloxane WB can also be used as a primer to even out porosity and
improve adhesion of BMC® Breathable Masonry Coatings.
Can be used on all block that you do not want to change color but have a water-repellant coating.
Note: Add up to 5-10 gallons of water to each gallon of Siloxane
Sure Klean® Blok-Guard® & Graffiti Control
Manufactured by PROSOCO, Weather Seal Blok-Guard® and Graffiti Control is a clear,
solvent-based silicone elastomer formulated to weatherproof concrete block and other
porous masonry materials. Blok-Guard® and Graffiti Control protects masonry surfaces
from repeated graffiti attacks without altering the natural appearance.
Contact your Trenwyth representative prior to using.
Sure Klean® 600 Detergent
Manufactured by PROSOCO, Sure Klean® 600 Detergent is a general purpose,
concentrated acidic cleaner for brick, tile and concrete surfaces. Dissolves mortar smears and
construction dirt quickl y, leaving the masonry clean and uniform with no acid burning or streaking.
Can be used with Astra-Glaze-SW+. A complete set of directions for cleaner use is found
on product container or see www.prosoco.com.
w w w. t r e n w y t h . c o m
G I 2 3

Cleaning Products
General Information
architectural masonry units
Sure Klean® Vana Trol®
Manufactured by PROSOCO, Sure Klean® Vana Trol® is a concentrated acidic cleaner for new
masonry surfaces that are subject to vanadium, manganese and other metallic stains. Vana Trol®
is designed to simplify rinsing and reduces potential for efflorescence. Can be used on
Astra-Glaze-SW+. A complete set of directions for cleaner use is found on product container
or see www.prosoco.com.
Graffiti Wizard®
Trenwyth Graffiti Wizard environmentally friendly graffiti remover is a non-toxic,
biodegradable and water soluble cleaner that easily removes most paints,
permanent markers, varnish, glue, crayon, oil and grease. Recommended for use on
Astra-Glaze-SW+, Verastone Plus and Trendstone Plus.
Astra-Glaze-SW+ Patch Kit
The Astra-Glaze Patch Kit consists of the following: One (1) can of patch base material and (1)
tube containing catalyst. Please allow three (3) weeks lead time for patch kit production. The patch
material is available in solid colors only. We do not produce patch material to match Astra-Glaze
that contains colored granules.
TRENDCOAT® acrylic water resistant sealer is a 100% liquid membrane acrylic polymer that
protects and enhances the finish of Trenwyth Verastone®, Verastone® Plus, Trendstone®
and Trendstone Plus® architectural concrete masonry units. TRENDCOAT provides a full-gloss,
smooth moisture-resistant finish that accentuates the beauty of the natural aggregates within the
integrally-colored concrete block. A high-quality, high-solids non-yellowing clear masonry sealer
specifically formulated for field coating, TRENDCOAT protects the finish from the damaging affects
of air pollution, sun and extreme weather (including water, alkalis, acids and ultraviolet light) as it
helps to cover any scuffs or scratches that may occur during handling or installation. TRENDCOAT also
provides excellent graffiti resistance for Verastone Plus and Trendstone Plus filled and polished units.
TRENDCOAT® WB (water-based) may be used in lieu of TRENDCOAT as some interior applications
may require water-based coating material only with low VOC’s. TRENDCOAT WB provides the same
benefits as TRENDCOAT but may not provide the rich gloss achieved by using TRENDCOAT.
See TRENDCOAT / TRENDCOAT WB literature Page TR2813 behind this tab.
ENGRAVING, ETCHING OR SILKSCREENING for Astra-Glaze SW+, Verastone, Verastone Plus,
Trendstone, Trendstone Plus (Price upon Request)
All orders require the following to be submitted:
· complete project and product specifications
· etching method (sandblasted, laser-etched)
· drawings
· and camera-ready art
A drawing must be submitted before any special
designs can be quoted.
w w w. t r e n w y t h . c o m
G I 2 4

architectural masonry units
Manufacturing Facilities
Anchor Concrete Products
One Connelly Road
Emigsville, PA 17318
800.233.1924
Anchor Concrete Products
Church Road
Emigsville, PA 17318
800.233.1924
Northfield Block Company
3400 E. Bungalow Road
Morris, IL 60450
800.358.3003
Superlite Block
4626 North 42nd Avenue
Phoenix, AZ 85019
800.331.9823
www.trenwyth.com
architectural
masonry
units
Contact us for
a Box Lunch
Presentation
www.trenwyth.com
© 2008 Trenwyth Printed in the USA TR2806