VERIFICATION OF INDEX MEMBRANES FOR HITCHINS NEW ...

VERIFICATION
OF INDEX MEMBRANES
FOR
HITCHINS
NEW ZEALAND LTD
May 2005
JN:6420
Joyce Group Limited
Page 1

VERIFICATION OF
INDEX MEMBRANES FOR
HITCHINS NEW ZEALAND LTD
___________________________________________________
1. INTRODUCTION
2. TECHNICAL and SPECIFICATIONS
3. HANDLING and STORAGE
4. DESIGN INFORMATION
5. BUILDINGS to NZBC ACCEPTABLE SOLUTION E2/AS1 FEBRUARY 2005
6. SPECIFICALLY DESIGNED BUILDINGS
7. STRUCTURE
8. DURABILITY
9. MAINTENANCE
10. OUTBREAK of FIRE
11. SPREAD of FIRE
12. EXTERNAL MOISTURE
13. INTERNAL MOISTURE
14. INSTALLATION INFORMATION
15. SYSTEM INSTALLATION
16. WARRANTIES
17. HEALTH and SAFETY
Joyce Group Limited
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18. BUILDING REGULATIONS
19. QUALITY
20. APPENDICES
1. Product Performance Warranties.
2. Quality Control Schedule.
3. Installation Details.
Joyce Group Limited
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VERIFICATION OF
INDEX MEMBRANES
1.0 INTRODUCTION
1.1 SCOPE
The Managing Director of Hitchins New Zealand Ltd has commissioned the Joyce Group
Limited to review the performance of the product “INDEX Membrane” and prepare a
verification report identifying compliance with the NZ Building Code for the following clauses.
Clause B2 Durability
Clause E2 External Moisture
1.2 VERIFICATION REPORT
The report considers the data provided by Hitchins New Zealand Ltd and the manufacturer
of INDEX Membranes and product appraisals carried out by leading Testing Authorities
throughout the world.
2.0 TECHNICAL SPECIFICATION
2.1 Product Information
INDEX modified reinforced bituminous membranes are manufactured by INDEX
Construction Products Spa of Italy under stringent quality control to standards set by
UEATC (European Union of Agreement) and marketed to over 100 countries worldwide.
2.2 The Technical Specification
INDEX Systems are designed for application to concrete, plywood and compressed sheet
substrates.
INDEX Membranes General
These are polymer-bitumen torch-on membranes.
extensive to provide.
The INDEX range of membranes is
Vapour barrier/shield layer.
Venting base sheet.
Cap or finishing sheet.
Specialised membranes.
Joyce Group Limited
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INDEX or finishing membranes are either mineral surfaced, (do not require protection
coating) or plain with a painted finish.
The system can be single layered, double reinforced membrane, two layered or multi
layered
This verification report specifically covers a double layered system including a base sheet of
either Testudo 20P or Autotene and Nova P plain and coated.
Autotene Base sheet is a 3.0mm thick torch-on membrane.
The underside of Autotene Base is coated with a special heat-activated adhesive. When the
membrane is laid on the insulating panel and the silicone film that protects the self-adhesive
face is removed, it is sufficient to have the indirect heat generated by torching of the
subsequent layer to produce simultaneous adhesion also of the base layer in contact with
the polystyrene foam.
With the energy necessary for laying one layer, using Autotene Base glues two, limiting the
emission of fumes and odours, avoiding solvent emissions and the production of
problematic waste materials, and avoid the use of an additional layer, with the added benefit
of using a type of thermal insulation that is economically advantageous. Moreover,
eliminating one heating phase halves the amount of time the installer is exposed to heat,
which is a significant advantage, particularly in the summer.
Autotene P Base sheet can be installed directly to the primed substrate of either plywood or
concrete. The primer is Indever E.
Autotene Base is a waterproofing membrane composed of distilled bitumen, selected for
industrial use, with a high content of elastomeric and plastomeric polymer additives to obtain
a phase inversion compound whose continuous phase is formed by polymers in which the
bitumen is dispersed.
The performance of the bitumen is therefore incremented along with durability and
resistance to high and low temperatures, while the already optimum adhesive and
waterproofing qualities of the bitumen remain unchanged.
Autotene P Base sheet incorporates a rot-proof composite reinforcement composed of a
non woven polyester fabric stabilised with fibreglass, which combines the stability of the
glass with the elastically and resistance of the polyester fibre.
Testudo P20 Base sheet.
Testudo membranes are manufactured from distilled bitumen selected for industrial use
modified with high content to elastocene polyester and reinforcement of high grammage, rotproof,
single strand spot bond polyester, isotropic, thermally stabilise non-woven 200 gram
fabric to produce an extremely strong, puncture and tear resistant membrane.
Joyce Group Limited
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Nova Mineral is a 4.00mm torch-on membrane.
The Nova membranes are made up of distilled bitumen, selected for industrial use, with
elastomeric and plastomeric polymers added to obtain a phase inversion compound whose
continuous phase is formed by polymers in which the bitumen is dispersed, where the
characteristics are determined by the polymeric matrix and not by the bitumen even though
this is the most consistent ingredient.
The performance of the bitumen is therefore increased along with the durability and the
resistance to high and low temperatures while the already optimum adhesive and
impermeable qualities of the bitumen remain unchanged.
The membranes are reinforced with high weight, isotropic, thermally fixed, rot-proof, “nonwoven”
single strand Spunbond polyester 180gram/m2 fabric. The reinforcement is very
strong, has a notable ultimate elongation and an optimal resistance to puncture and tearing.
Mineral Nova P is reinforced with a composite, high weight, rot-proof, “non-woven”
polyester 160gram/m2 fabric, stabilized with fibreglass 60gram/m² mat. This reinforcement
has a high tensile strength, is flexible and has optimal dimensional stability in hot conditions
which reduces the problems of the banana effect and the retraction of head lap joints as it is
2 to 3 times more stable than normal reinforcements in “non woven” polyester fabric.
Indever Primer is a bituminous primer made up of a compound of solvents and oxidized
bitumens. The primer produces a film with a strong anchorage on every type of substrate
without any degree of superficial stickiness.
Indever Primer is a bituminous primer with a higher concentrate of oxidised bitumen and
plasterciser to produce a resin rich film on the substrate to provide a stronger anchorage on
all types of substrates.
Ideal for regions or building designs that could experience strong winds.
3.0 HANDLING AND STORAGE
3.1. Handling and storage of all materials whether on or off site is under the strict control of the
Hitchins New Zealand Ltd trained installers.
Dry storage must be provided. The rolls should always be stored in an upright position on a
smooth, flat surface.
Joyce Group Limited
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4.0 DESIGN INFORMATION
4.1. Typical INDEX Roofing Protection systems comprise the following principal elements:
Load bearing structure that may be made of:
Concrete (site-cast concrete or a mixture of concrete tiles and prefabricated concrete
panels). This may be lined with a lightened cementitious cope of variable thickness used to
create the minimum incline necessary for the downflow of rainwater on flat roofs; timber,
planking or various types of wood compound panels; Metal, in ridged sheeting.
4.2. Vapour barrier or vapour shield, which is generally made of a polymer bitumen membrane
in the roofing if there is also thermal insulation. Its function is to protect the insulation from
humidity originating internally.
4.3. Waterproof covering made from overlapping polymer bitumen membranes, which protect
the roof from inclement weather. It is used for flat roofs but is necessary for inclined roofs
lined with tiles or other discrete elements.
4.4 Roofing protection is not strictly necessary nor always utilised but if a flat roof is used as a
terrace and subject to foot traffic, some kind of pavement must be put down on top of the
covering. Likewise if the roof is used for parking. Often, a layer of gravel is used even if this
increases the costs of the load-bearing structure and so is becoming less common.
Such systems are known as “heavy protection”. Often, however, the waterproof covering is
itself uncovered (an open covering) and can be painted or the membrane may incorporate a
slate chip protection known as “protected” membranes. INDEX products of this nature are
found in the Mineral range.
4.5. Other features: perimeter walls, skylights, rainwater drain holes, guttering, cornices etc.
which are fundamental for a roof to do its job properly which should be carefully designed
and constructed.
Different but associated layers in the same roofing system interact as they contract and
expand with fluctuations in temperature. It is essential that these movements are restricted
by careful design, correct construction of the points of connection and through careful choice
of the system components. The different natures of the various layers affect the mechanical
resistance of the adjacent layers.
4.6 Plywood must comply with AS/NZS 2269 and be H3.1 treated. LOSP treated plywood must
not be used under any circumstances.
It must be CD Grade Structural Plywood with sanded C face upwards. It must comply with
NZ Building Code Acceptable Solution E2/AS1 February 2005.
Joyce Group Limited
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4.7 Resistance to foot traffic
The membranes can accept, without damage, the limited foot traffic and light commercial
loads associated with installation and maintenance operations. Where traffic in excess of
this is envisaged, additional protection to the membrane, in accordance with the marketing
company’s instructions must be provided. Reasonable care is required, however, to avoid
puncture by sharp objects.
5.0 BUILDINGS TO NZBC ACCEPTABLE SOLUTION E2/AS1 FEBRUARY 2005
5.1 Substrate
5.2 Existing concrete substrate if infected with mould, apply Hitchins Mosskill. Leave for 3
days and water-blast clean. Leave to dry and carry out any repairs required using Hitchins
Formcrete F.
5.3 New concrete should be clean and free from defects, cured at a minimum of 14 days,
preferably 28 days, incorporating fillets to upstands, with sufficient falls and outlets. Dense
concrete needs to be etched or abraded and pre-sealed with thinned down primer.
5.4 Plywood shall be 17.5mm tanalised CD grade structural plywood over joists and noggins at
600mm centres shall be glued and fixed with stainless steel screws approximately 55mm
length at 150mm centres on perimeter and 200mm centres throughout the sheet. Plywood
to be laid in a brick-like pattern with face grain running in one direction at right angles
(across) purlins or joists. Falls to be a minimum of 1 in 50.
5.5 Compressed sheet shall be 20mm thick over joists and noggins at 400mm centres, which
will be glued and fixed with 55mm to 60mm x 10 gauge stainless steel Pozidrive Comsheet
screws at 200mm centres. Sheets must be laid across the joist and falls to be 1.50mm
minimum. The sheet installation shall also follow the manufacturer’s specific instructions.
5.6 On large structures involving steel trusses, purlin and noggins (spacing greater than 800mm
centres) and involving tongue and groove plywood. INDEX Autotene or Kontabit Bandage
must be laid over plywood sheets and mechanically fixed on one edge of strip. This
provides a slip membrane to stress points.
5.7 Before any primer is applied or membrane installed, carry out an inspection to ensure that
all preliminaries have been carried out satisfactorily, including formation of falls, timber fillets
to the corners, gutters, outlets, vents, upstands, fascias, balustrades and any other
protrusions, sky lights, ducting, rebates to walls and expansion joints if required. Ensure the
plywood is free of defects, smooth, clean and dry.
5.8 Priming
5.8.1 If possible, pre-prime sheets before installation or as soon as practical after sheets have
been installed.
Joyce Group Limited
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5.8.2 To dry surface apply Hitchins Indever primer at 5m² to all sheet faces and edges, including
fillets. Leave to dry.
5.9 Roof Drainage
5.9.1 Roofs must be constructed so that falls and drainage comply with Paragraph 8.5.6 of NZBC
Acceptable Solution E2/AS1 February 2005. Roof must be constructed with 1:50 minimum
falls, and gutters must be constructed with 1:25 minimum falls, with no seams in the gutters
closer than 1 metre to an outlet.
5.10 Junctions and Penetrations
5.1.1 Junctions of the roof to walls must comply with paragraph 8.5.8 of
NZBC Acceptable Solution E2/AS1 February 2005, and penetrations must comply with
paragraph 8.5.9.
6.0 SPECIFICALLY DESIGNED BUILDINGS
6.1 Concrete Substrates
6.1.1 Concrete substrates must be to a specific engineering design to meet the requirements of
NZBC.
6.2 Plywood Substrates
6.2.1 Plywood substrates must be supported by a framing system meeting the requirements of the
NZ Building Code and the specifications of the plywood manufacturer. Plywood must be of
a thickness and grade to meet specific structural design requirements.
Plywood must be secured to the structure to resist wind uplift and all other forces acting on
the roof, such as deflection from gravity and incidental live loads.
In high wind regions, the design of the building must provide maximum protection against
wind up-lift forces on the membrane and its installation will incorporate adequate mechanical
fixing of the base sheet at parapet and perimeter of the roof.
The membrane system shall be able to with stand uplift to wind loads as specified in NZS
3604:1999, Timber Framed Buildings or AS/NZS 1170.2. 2002 Structural Design Actions –
wind Actions or AS 4055-1992 Wind Load for Housing or other Constructions.
6.3 Roof Drainage Junctions and Penetrations
A specific weathertightness design must be undertaken for each roof for roof drainage,
junctions and penetrations to meet the requirements of the NZ Building Code.
Joyce Group Limited
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STRUCTURE
7.1 The Load-Bearing Structure
This is the surface on which the roofing protection system rests. Its function is to resist
deformation from the permanent load of its own weight and by temporary loads imposed by
the use to which it is put, maintenance and weather conditions such as snow, rain, wind etc.
7.2 The Laying Surfaces and Inclination
The load-bearing structure also creates the laying surface for the layers above which,
except in particular cases, are layers of constant thickness.
It is the load-bearing structures function to ensure there is sufficient incline for the downflow
of rainwater.
This is not a problem for sloping roofs or for roofs made from timber or metal, but for
cementitious flat roofs another solution is required.
A lightweight concrete cope is laid over the load-bearing structure in variable thicknesses
and is divided into a series of areas no greater than 500 m² each and with variable inclines.
Each area has its own water drainage system proportional in section to the area of roof it
serves.
The laying surface must be smooth and on a cementitious surface. There should be no
depressions greater than 1 cm under a 2m. straight-edge laid on the surface, or greater than
3 mm using a 20cm rule. Variations in level between timber planks should not exceed 2mm.
Edging lines between prefabricated panels are covered with bridging strips to insulate them.
7.3. Structural movement of the substrate must be adequately allowed for, and movement joints
provided. The configuration and location of the joints in the substrate should be carefully
considered. Conventional construction and movement (including seismic) joint details may
be used.
The BRANZ Good Roofing Membrane Practice gives guidance in this area.
7.4. The membrane needs to be considered as part of the total roof design, and as such will
need to be stopped at formed waterproof construction and structural movement control
joints where these are installed. Construction/control joints must be constructed in
accordance with the details of the current Technical Literature for the INDEX Roofing
Membranes.
In common with any roof membrane system, the ability of the product to resist structural
movement will decrease with age.
Joyce Group Limited
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As a result, premature failure may occur at structural movement joints if these are not
designed and installed correctly.
7.5 Large roof structures require expansion joints to be designed and constructed at 10 metre
centres or at stress points such as change of direction or corridors abutting the main
building, (Refer appendix 3 for details).
7.6 Ventilation to the roof cavity must allow for airflow throughout the cavity. The number of
airvents required will depend on the depth of the cavity and whether soffit vents are
installed. Therefore the ratio of air vents can very from 1 in 20m² to 1 in 40m².
8.0 DURABILITY
8.1 Serviceable Life
INDEX roofing membranes are expected to have a serviceable life of at least 15 years
provided they are designed, used, installed and maintained in accordance with the technical
literature of the manufacturer.
8.2 Chemical Resistance
Industrial air pollutants and wind-borne salt deposits should not significantly affect durability
of the membranes.
However, the long-term properties of the material may be affected by contact to petroleumbased
products such as oils, greases and solvents.
9.0 MAINTENANCE
9.1 Preventive maintenance is very important to provide the long term performance of the
membrane system
9.2 After any structural alteration or the installation of plant or equipment, these membranes
should be inspected by the installer and corrective work carried out.
9.3 The membrane roof system must be regularly (at least 2 times per year) checked for
damage, to remove rubbish or debris and to ensure gutter outlets do not become blocked.
9.4 Moss or mould growth must be treated and surface cleaned and any plant growth removed
when infestations occur.
9.5 Care must be taken when inspecting the membrane system to ensure the continuing
prevention of moisture ingress and repairs must be undertaken where required.
Damage such as small punctures and tears must be repaired by an approved applicator.
Protective coating shall be reinstated after seven years.
Joyce Group Limited
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10.0 OUTBREAK OF FIRE
10.1 Separation or protection must be provided to the membranes and
plywood substrate from heat sources such as flues and chimneys.
10.2 NZBC Acceptable Solution C/AS1 Part 9 and Verification Method
C/VM1 provide methods for separation and protection of combustible materials from heat
sources.
11.0 SPREAD OF FIRE
11.1 The membranes may be used on roofs of buildings intended for all Purpose Groups,
including SC and SD, subject to the requirements of NZBC Acceptable Solution C/AS1 Part
7, Paragraph 7.11.1.
11.2 The membranes may be used for cladding fire-rated roof construction, providing the roof
construction complies with the requirements of NZBC Acceptable Solution C/AS1 Part 7.
12.0 EXTERNAL MOISTURE
12.1 INDEX Roofing Membranes, when installed in accordance with the Technical Literature, will
provide a roof that will shed precipitated water and melted snow, and prevent the
penetration of water that could cause undue dampness or damage to building elements.
12.2 The membrane systems must be installed and maintained in a weatherproof state at a
minimum recommended fall of 1:50. All membrane joints must be as detailed in the
Technical Literature.
12.3 At penetrations, the membrane must be raised to a level above that of any possible ponding
that may be caused by blockage of roof drainage facilities.
12.4 Side laps must be a minimum of 100mm and end laps must be a minimum of 150mm. All
laps joints must be torch sealed and staggered.
12.5 Provisions for Snow
Specific weather tightness design for preventing the ingress of snow melt water is required
in accordance with the requirements of NZBC Acceptable Solution E2/AS1 February 2005
Paragraph 1.3.
13.0. INTERNAL MOISTURE
13.1 The impermeability of the membranes requires that consideration must be given to the
effective control of moisture in the roof structure, and closed-in construction spaces under
the membrane must have adequate ventilation to prevent the accumulation of moisture
venting and vapour barrier requirements will depend on the level of moisture that is present
in the construction at the time of the installation, the value of the ceiling/roof construction,
and the type of occupancy.
Joyce Group Limited
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14.0 INSTALLATION INFORMATION
14.1 Installation Skill Level Requirement.
Installation of membranes must be completed by Hitchins New Zealand Limited trained and
approved applicators.
15.0 SYSTEM INSTALLATION
15.1 Substrate Preparation
All surfaces must be checked to ensure they are clean and dry, smooth and free from sharp
edges, loose or foreign materials, oil, grease or other deleterious materials that may affect
adhesion of the membranes or may damage the membranes.
15.2 A concrete surface is acceptable if no bumps greater than 10mm are found under a 2m rule
in any direction and no bumps greater than 3mm are found under a rule of 0.20m.
The surface should be trowelled and all cracks and gaps should be filled with mortar.
Any projections and site residue such as nails, sheeting, bits of wood etc. must be removed.
15.3 17.5mm plywood must be fixed using glue and 55mm long stainless steel counter sink head
screws only, at 150mm centres on perimeter and 300mm centres throughout the sheets.
Sheets must have 3mm gaps between joints except where tongue-in-groove joints are used.
Plywood must be laid in a brick bond pattern with the face grain at right angles to the main
support forming with grain going in one direction.
A 20mm triangular fillet shall be used at the base of any 90º upstand and external edges
shall be chamfered with a minimum radius of 5mm.
15.4 20mm compressed sheet must be fixed using glue and 55mm to 60mm x 10 gauge stainless
steel Pozidrive Comsheet screws at 200mm centres. Sheets must be laid across the joists
and the installation procedure shall be in accordance with the specific instruction of the
manufacturer of the sheet.
15.5 Plywood and framing at the time of membrane application must have a maximum moisture
content of 20% or lower if specified by the plywood manufacturer.
15.6 The relative humidity of the concrete must be 75% or less before laying the membrane.
Concrete slabs can be checked for dryness by using a hygrometer.
15.7 Priming
Prior to the application of membrane all plywood sheet faces, edges and fillets must be
primed at a rate of 5m² per litre. Concrete surfaces should also be primed.
Joyce Group Limited
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15.8 Membrane Installation
The membrane must be installed in accordance with the technical literature of the
manufacturer.
The installation of the base sheet to buildings in high wind regions is over Indever E Primer
and will incorporate mechanical fixing (large flat head fasteners) to parapet and perimeter of
roof as per technical literature of the manufacture.
Installation of the membrane is to commence at the lowest point working up the grade of the
roof orderly.
15.9 Bonding of torch-on sheets is achieved by melting the lower surface by torching and
pressing the membrane down. Press the membrane to the surface with a broom or roll
smooth carefully without forming wrinkles or air bubbles.
Care must be taken to not overheat the coating. A bead of molten material must exude from
all laps to indicate a satisfactory seal and should be leveled out using a heated rounded tip
trowel.
The sheet joints to the finish membrane shall be offset to the sheets of the base sheet.
The membrane shall be torched down on the underside to fuse the membrane to the
substrate for maximum adhesion.
Form mould and weld additional layers of membrane to provide flashings to wall upturns,
fascia down turns, into gutters, hip ridges, skylights, expansion joints, air vents, mechanical
services pipes/ducts balustrade posts, rain water heads and other penetrations in
accordance with detailed drawings (Refer Appendices 3).
On joints of the mineral capping layer the exuded bead must have extra mineral chip applied
while still hot.
15.10 Coatings
Where a coloured coating system is specified all debris and dexterous material must be
removed from the surface and the surface must be dry and free from contaminants before
application.
The Hitchins acrylic coating in selected colour should be applied at the rate of 6m² per litre.
Each coat must be allowed to dry for a period of 2 hours before application of the second
coat.
INDEX Solaris Plus, a bituminous aluminium coating, silver colour should be applied to a
rate 7m² per litre coat. Each coat must be allowed to dry for a period of 3 hours before the
application of the second coat.
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The approved applicator and building contractor must complete the Hitchins / INDEX
Quality Control Schedule for each project’ (Refer Appendix 2). The completed document
is to be made available to the building owner at the completion of the contract.
15.11 Inspections
The technical literature must be referred to by Building Consent Authorities during the
inspection of membrane applications.
16.0 WARRANTIES
Hitchins New Zealand Ltd will provide a written product performance warranty. The type of
system will determine the duration of warranty period.
Refer appendix 1.
The installer of the INDEX Membrane System will provide a written workmanship warranty.
Refer appendix 2.
17.0 HEALTH AND SAFETY
Safe use and handling procedures for the membrane systems is provided in the Technical
Literature.
18.0 BUILDING REGULATIONS
18.1 In my opinion INDEX Roofing Membranes, if designed, used, installed and maintained in
accordance with the statements and conditions of the manufacturer’s technical data and the
conditions of this report, will meet or contribute to meeting the following provisions of the
NZBC.
Clause B2 Durability
Performance B2.3.1(b) 15 years.
INDEX Roofing membranes, meet this requirement. See paragraphs 8.1 and 8.2 of
report.
this
Clause E2 External Moisture
Performance E2.3.1 and E2.3.2. INDEX Roofing Membranes meet these requirements.
See paragraphs 12.1 to 12.5 of this report.
19.0 QUALITY
19.1 The manufacture of the materials forming the system has not been examined in this
assessment. An examination of the manufacturing practice and quality control procedures
employed in the manufacture of the materials is subject to the ongoing validity of the current
BBA (British Board of Agreement) and Bureau Veritas Control Reports.
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19.2 The quality of materials supplied by Hitchins NZ Ltd is the
responsibility of Hitchins NZ Ltd.
19.3 Quality on site is the responsibility of Hitchins NZ Ltd trained installers.
A Quality Control Schedule will be completed for each project, (Refer appendix 2 for copy).
19.4 Designers are responsible for the building design, and building
contractors are responsible for the quality of construction of
accordance with the instructions of Hitchins NZ Ltd.
substrate systems in
19.5 Building owners are responsible for the maintenance of the membrane systems in
accordance with the instructions of Hitchins NZ Ltd.
SOURCES of INFORMATION
AS/NZS 2269: 1994 Plywood-Structural.
Approved Document for New Zealand Building Code External Moisture Clause E2, Building
Industry Authority, February 2005.
NZ Building Code Handbook and Approved Documents, Building Industry Authority 1992.
BRANZ Good Roofing Membrane Practice Reprint October 2003.
Ron Thurlow
JOYCE GROUP LIMITED
Joyce Group Limited
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Appendix 1
PRODUCT PERFORMANCE
WARRANTIES

Hitchins New Zealand Limited
P O B ox 40 -7 49 , Up per H ut t, W el li ngto n, New Z ea la n d Te l: 64 4 52 7 7248 Fa x: 64 4 528 4 8 13
8 December 2004
PRODUCER’S STATEMENT
Covering
PRODUCT PERFORMANCE & WARRANTIES
On
INDEX MEMBRANES
INDEX modified reinforced bituminous membranes are manufactured by INDEX CONSTRUCTION PRODUCTS SPA of Italy
under stringent quality control and marketed to over 100 countries worldwide. INDEX membranes have been appraised by
leading testing authorities throughout the world and certified as suitable waterproof membrane for the building and
construction industry, as such meets the E2 and B2 requirements.
HITCHINS NEW ZEALAND LIMITED with an established history of marketing innovative and quality products is the
distributing and promotional company for INDEX membranes throughout New Zealand and the Pacific Islands.
Installation of INDEX membranes is through approved Hitchins’ Gunac applicator firms with experienced and trained
personnel working within the recommended application procedures set down by INDEX and Hitchins New Zealand Limited, in
keeping with good trade practices.
INDEX membranes installed over sound clean and primed substrates, built to the Revised Building Code and in keeping
within the guidelines of Hitchins’ Quality Control Sheet and substrate recommendations.
HITCHINS NEW ZEALAND LIMITED will provide a written Product Performance Warranty as follows:-
* Twenty (20) Years
* * Protea Duo P 4mm triple reinforced single layer membrane finished in a Mineral Chip or Plain (Texflamina
surface) over-coated with an approved Hitchins’ coating.
* * A double layer fully bonded INDEX membrane system (6 to 7½mm) finished in a Mineral Chip or over-coated
with an approved Hitchins’ coating.
* Fifteen (15) Years
* * A single layer INDEX Plain membrane 4.5Kg (4.5mm) finished in Mineral Chip.
* * A single layer INDEX Plain membrane (3mm to 4mm) finished in an approved Hitchins’ coating.
* Ten (10) Years
* * Single layer INDEX Plain membrane (3mm to 4mm) left uncoated.
* * Single layer INDEX Plain membrane (3mm to 4mm) re-sheathed over an existing membrane.
Within the above Product Performance Warranty, design, expansion joints, venting, adequate falls, outlets and flashing
requirements must be to a high standard, including the installation work. Regular and adequate cleaning maintenance (moss
or mould treatment if and when required) must be carried out including reinstatement of the protective coating every 7 years
approximately. Maintenance requirement is covered under the Hitchins' Product Performance Warranty document.
Hitchins New Zealand Limited Product Performance Warranty must be accompanied by the applicator workmanship
warranty, thus providing the client with a comprehensive overall performance warranty.
For and on behalf of
Hitchins New Zealand Limited
Jim Gerbes
MANAGING DIRECTOR

MARKETING OF QUALITY PRODUCTS
The following resume covers Hitchins New Zealand Limited in association with INDEX Constructions Products Spa to
provide the market with quality bitumen membrane products.
INDEX Construction Products Spa within its first division is a world leader in the production and marketing of polymer
bitumen waterproof membranes in various locations around the world with marketing associated companies in 110
countries.
INDEX invests extensively in research and development to supply products of advanced technology and unique
properties including various for specific uses. All products are produced to a high standard under BVQI (Bureau
Veritas Quality International) an ISO-9001 accreditation.
INDEX product documentation covering company profile, waterproofing composition and analysis of roofing protection
systems, application manuals, product Data Specs, technical specifications and sales brochures are of an exceptional
standard and composition. INDEX back-up support and service is of the same calibre.
Coupled with Hitchins New Zealand Limited extensive history of service within the building and construction industry,
marketing quality products under a Performance Warranty, together with INDEX Construction Products Spa, we are
able to provide:
* Quality products through an extensive range.
* Unique products for specific uses.
* High standard of technical support and service.
* Products covered by Performance Warranty.
Unique products for a specific use
The INDEX Torch-On Membranes brochure depicts the range of products Hitchins New Zealand Limited market and
you will note the unique properties and functions some of these membranes have, such as:
* Protea Duo P, 3mm - Triple reinforced multi-layer bitumen and finished with Texflamina to produce the highest specification
membrane on the New Zealand market.
* Testudo P 20, 3mm - A high quality SBS bitumen rich reinforced but flexible membrane for tanking, gutters.
* Firestop P, 4.5 kg - The flame-retardant properties provide an ideal membrane for public amenity buildings.
* Defend H, 4 mm - An anti-root protective and waterproof membrane for garden areas.
* Nova Biamarto Plain and Mineral – Double-reinforced APP bitumen membrane; quality is above the industry standard.
* Elastocene P, 3mm - Flexible modified bitumen membrane for all year round installation and detailed work.
* Fidia P, Biamarto 3mm - An APP modified bitumen membrane with excellent weather-ability, durability and high quality
finish.
* Perfobase - Used in conjunctions with air vents to provide base sheet to ventilate the substrate in a double layered system.
* Roll Base - For use over timber or deteriorated bitumen screeds in a double layered system.
* Autotene P –Fully bonded Base Sheet in a double-layer system.
INDEX products are marketed through approved Hitchins’ Gunac applicators for installation on projects throughout
New Zealand and the Pacific Islands.
Hitchins New Zealand Limited through the INDEX Club provides incentives and financial support for applicator training
at the INDEX Training Auditorium in Italy. This is a unique and comprehensive scheme and there is nothing like it on
the New Zealand market. Further we hold training seminars at our Upper Hutt facilities and other locations around
New Zealand.
With training, application manuals, Health and Safety guides provided, plus onsite inspections and guidance we
believe that collectively, our applicator network will provide a high standard of workmanship.
Hitchins produce and market quality coatings, many of which have the reputation of providing long term performance.
Simply, they have stood the test of time.
With high U.V. rays in New Zealand, Hitchins New Zealand Limited's policy is that other than mineral finishes, all other
membranes should be coated with one of our proven coatings.
INDEX, Hitchins and the Gunac applicator network providing quality products installed to a high level of finish.

P O B ox 4 0 -74 9 , Uppe r H utt, W elli n gto n, New Zea la n d Te l: 64 4 52 7 724 8 Fa x: 64 4 528 4 8 13
Durability Statement
INDEX Construction Products Spa manufactures a wide range of bitumen membranes, one of which is Fidia Biamarto.
Double Fidia Biamarto is an App modified double reinforced bitumen membrane. The App modified bitumen provides
durability and U.V. resistance. The double reinforcement comprises of spunbound polyester for strength and glass
fibre layer for stability.
Technical specifications of Fidia Biamarto are covered in the product Data Spec. Properties of Fidia Biamarto are
durability, mould and workability, flexibility yet trafficable and the ability to achieve a professional finish. Fidia Biamarto
weathers to a Grey, exposing the fine fibreglass fibres that provide improved adhesion of the coating.
Fidia Biamarto coated with INDEX Solaris or Hitchins' Traffigard will provide improved weather resistance U.V.
protection and heat reduction thus ensuring the membrane remains stable and performs satisfactorily over an
extended period. The coatings themselves will perform as required under the New Zealand Building Code.
Warrantees are addressed under the project contract documentation and Hitchins New Zealand Limited Product
Performance Warrantees as covered in their Producer's Statement.
Product performance, particularly durability is dependent on the maintenance requirement during the warranty period
and beyond. The coated membrane should receive regular inspections and maintenance work (when required) carried
out, being:
(1) Check to ensure all outlets are free of foreign or vegetative matter.
(2) If moss or mould growth appears, treat and waterblast clean at low pressure. If no infestation wash down
every 2-3 years.
(3) Any fault found in the membrane, the applicator firm (installer) or in their absence Hitchins New Zealand
Limited advised, so those repairs can be carried out promptly. Time is of the essence. Repair work (if required)
within the Warranty period will be at no cost to the client.
(4) The protective coating needs to be reinstated when required, usually every 7 years. This is at the client's cost.
Given that the maintenance requirements are carried out as above, including any repair work (if and when required) by
an approved Gunac applicator, then Fidia Biamarto membrane will meet the durability requirements as under the New
Zealand Building Code.
For and on behalf of
Hitchins New Zealand Limited
Jim Gerbes
MANAGING DIRECTOR
3 July 2001

Appendix 2
QUALITY CONTROL SCHEDULE

BITUMEN ROOFING MEMBRANE SYSTEM
QUALITY CONTROL SCHEDULE
(To be completed by Hitchins’ Approved Applicator and Building Contractor of the Project)
Project Name:
Project Address:
Building Contractor:
Phone:
Applicator:
Commencement Date:
Completion Date:
CONSTRUCTION BY BUILDER (SEE REVERSE SIDE) SIGNATURE DATE
1) Tanalised H3 plywood installed at correct thickness.
2) Supporting timber framing suitable and at correct centres, both
purlins and noggins.
3) Plywood installed (layout) and fixed correctly.
4) Internal gutters adequate with sufficient outlets (size and number
of) plus overflows.
5) Tanalised cove to upstands, drip mould to conventional gutter
and all vents/pipes with cowels.
6) Other substrates (state ) installed and
finished to a high standard.
7) Falls as per Building Code, minimum 1:50 roof and 1:25 gutters.
HITCHINS’ APPROVED GUNAC APPLICATOR
1) All new or existing substrates checked and satisfactory, any
repairs required carried out.
2) Prime all surfaces with INDEX Indever Primer.
3) Plan and install specified INDEX membrane system as per
contract specification and Hitchins’/INDEX Installation
Instructions.
4) All upstands, ridges etc to have an under-flashing or double up
over flashing installed.
5) Where required install expansion joints, air-vents, flashings to
pipes and vents, barge and fascia flashings as per
INDEX/Hitchins’ detailed drawings.
6) Where required line gutter and install droppers, parapet outlets,
overflows etc as per detailed drawing and instruction.
7) Mineral finish left tidy, plain membranes coated with either
Traffigard and Solaris Plus, or Alumasol.
8) Project completed to satisfactory standard, warranty application and
provided.

INDEX BITUMEN ROOFING MEMBRANE SYSTEM
The following is provided by Hitchins New Zealand Limited to assist the building contractor to provide a substrate
suitable for the installation of INDEX reinforced modified bitumen membranes. The contract documents, New Zealand
Building Code and the plywood manufacturer’s installation recommendations should be adhered to. If there is a
conflict of instructions, the building contractor is to resolve with the architect or client, ensuring that Hitchins’
recommendations (or improved standard) is adhered to as we know our product’s capabilities and limitations. The
application or installation process is to be carried out by an approved Gunac applicator. These terms are a prerequisite
to obtaining a Hitchins’ Product Performance Warranty.
CONCRETE
To be at least 28 days old, minimum falls of 1:50 with no ponding, clean and dry. Large structures to have expansion
joints incorporated. Uncured or damp concrete is to have an INDEX Vented Base Sheet to allow moisture vapour to
dissipate out.
PLYWOOD
1. Plywood is to be tanalised H3 and of minimum CPD grade, arrive on site dry and kept dry until fixed. Prepriming
recommended.
2. All plywood primed with INDEX Indever Primer.
3. Supporting timber spacing to be at the following centres:-
21mm plywood at 800mm centres
17.5mm plywood at 600mm centres
15mm plywood at 400mm centres
4. Centres being both ways, i.e. purlins and noggins (blocking) every third noggin to be full depth of purlin or any
other construction system that ensures the purlins will not twist.
5. All plywood laid in one direction across the purlins (right angles) as per the plywood manufacturer’s
instructions.
6. Plywood laid in an offset brick like pattern. Vital!
7. Fixing by twist nails or screws is to be at a minimum of 150mm centres at sheet perimeter and 300mm
throughout the sheet.
8. Minimum length of nails or screws to be three times the thickness of plywood e.g. 18mm requires 54mm or
larger fixers.
9. For improved performance apply a bead of adhesive to supporting timber prior to installing plywood.
10. If Tongue and Groove plywood is used for improved performance glue in the Tongue.
11. Plywood laid with approximately 2mm gap except on large roof structures where expansion joints must be
designed and built in. See expansion joints.
12. Roofs to have a built in fall of minimum 1 in 50 and gutter 1 in 25.
13. If Tongue and Groove plywood is used where all plywood sheets are not supported, then plywood joints are to
be bandaged using Hitchins’ Kontabit or INDEX Autotene, which is a self adhesive flexible elastomeric
membrane.
14. Alternatively the roof is to be sheathed with a double (Base and Cap Sheet) membrane system.
15. If the roof cavity is required to be vented, it must be designed and built to provide airflow to all cavities. See
venting.
16. Expansion joints designed and constructed as per Hitchins’ recommendations (see detailed drawings in mini
manual) and as per plans and specifications.
17. Built in gutters, outlets and overflows to be adequate in size and number to shed water under all conditions.
18. All upstands to have tanalised timber fillets installed.
19. Barge ends, drip edge detail to gutter, etc to be installed.
20. All pipes, vents etc to have metal coves installed so that INDEX membranes are flushed up and under.
21. INDEX membrane flashing installed prior to wall lining installation, ditto skylights which then also have metal
over-flashing.
22. Concrete, block or brick to provide a chase for INDEX membrane to be flashed into and sealed with bead of
sealant.
23. In general, provide a sound substrate for the installation of INDEX membranes.
24. Install Hitchins’ supplied INDEX membranes as specified over fresh Indever Primer as per manufacturer’s
recommended procedures and good sound trade practices, including double up flashings.
25. If required install air-vents, within the INDEX membrane system on raised platform, well flashed and sealed.
See Hitchins’ details.
10. Finally, the Hitchins’ supplied INDEX membranes are protected by the building contractors or client during
the remaining construction period; then checked over at completion and any repairs or resurfacing carried out
at their cost.

Appendix 3
INSTALLATION DETAILS

HITCHINS’ INDEX DETAIL DRAWINGS
INTRODUCTION
The following drawings have been produced to assist specifiers and applicators.
They clearly show what is required not only in installation, but in the finishes.
For clarity we have produced the drawings in colour as per the codes below:-
INDEX’ Membrane
INDEX’ Accessories
Substrates - Plywood
Supporting Structure
Metal Roof
Joint Sealant

Appendix 4
CURRICULUM VITAE
of
RONALD FREDERICK THURLOW
and
TERRENCE HUGH O’CONNER

Appendix 4 (continued)
WELLINGTON CITY COUNCIL

For further information please contact -
NEW ZEALAND LIMITED EW LI
FOR FULL
Technical Support
PLUS
Quality Product Supply
AND
Friendly, helpful service!
CONTACT
WELLINGTON AUCKLAND AUCKLAND
Jim Gerbes – Managing Director
Phone No: 04 527 7248
Facsimile No: 04 528 4813
Jim’s Mobile No: 021 490 590
Email Address: jim@hitchins.co.nz
Wade Brown – Technical Consultant
Mobile No: 021 22 111 22
Email: office@hitchins.co.nz
P O Box 40-749, Upper Hutt
7/15 Masefield Street, Upper Hutt
Jason Gerbes – Auckland Regional Manager
Phone No: 09 360 3246
Facsimile No: 09 360 5081
Jason’s Mobile No: 021 527 667
Jason’s Email: jason@hitchins.co.nz
P O Box 46 018, Herne Bay, Auckland
300 Richmond Road, Grey Lynn, Auckland
Rick Mumford – Technical Consultant
Phone No: 09 360 3246
Facsimile No: 09 360 5081
Mobile No: 021 318 021
Email Address: office@hitchins.co.nz
P O Box 46 018, Herne Bay, Auckland
300 Richmond Road, Grey Lynn, Auckland
HITCHINS NEW ZEALAND LIMITED
C\Winwood\Joyce Group Report on INDEX Membranes/28 July 2005/Fliss