Metal Lath Galvanized Junior™ Mesh (LAM) (P)* (O)* (S ...

Paper-Backed
Offset Options
Metal lath is available
backed with asphalt saturated
paper for applications
requiring a
moisture barrier. Paper
conforms to Federal
Specification UU-B-
790a, type 1, grade D,
style 2. Dietrich uses a lettering system incorporated into
the product code to indicate available offsets.
Types
P—Paper is offset by 1" on one side
and one end.*
O—Paper is offset by 2" on one side
and one end.
S—Paper is offset by 1" on one end.
Sides are not offset.*
K—Specially applied Kraft paper for
use with machine-applied stucco
to minimize plaster waste.
*Available for non-code work. The Uniform Building Code
(UBC) requires a 2" paper lap per ASTM C 1063-99.
Junior Diamond Mesh Lath is used as a substrate for gypsum
plaster or for Portland cement plaster stucco on either
interior or exterior wall, ceiling, soffit and fascia surfaces, and
can be used under ceramic tile in wall ceiling and floor applications.
It’s useful in all general-purpose applications, and is the
best lath available for ornamental work and contoured surfaces.
Junior Diamond Mesh Lath—Asphalt Paper Backed is
used in applications where a moisture barrier is required.
Care should be taken to make sure paper overlaps paper and
metal overlaps metal in a shingle-like manner during application.
Dietrich’s paper backing extends beyond the mesh
to accommodate shingling application. For external application,
3.4 lb./sq. yd. lath is recommended.
Self-Furring Junior Diamond Mesh Lath is attached to
substrate through the dimple that furs the lath surface away
from a solid substrate. This lath is especially useful as a stucco
base or for column fireproofing or replastering over old
surfaces. Self-furred lath is required over all solid surfaces.
Self-Furring Junior Diamond Mesh Lath-Asphalt
Paper Backed is used where a moisture barrier is required.
It’s attached in the same manner, but care should be taken
to make sure paper overlaps paper during application.
For more information or to contact a sales representative, see page 3.
Overview
4-Mesh Z-Riblath is used wherever sound, flat surfaces are
required. Nail, staple or screw-attach lath to framing with
ribs perpendicular to wall studs. Z-Riblath is tied to suspended
ceilings but can be nailed, stapled or screwed to the
ceiling joists for direct applications. Flat rib lath should
never be used over solid surfaces.
3/8" Riblath is the most rigid of all and provides the added
support required when framing is more than 16" O.C. but
less than or equal to 24" O.C. In wall and ceiling applications,
it must be attached in the same manner as 4-Mesh Riblath.
Due to 3/8" rib, minimum ground thickness must be 1".
Barrier Mesh is a tough, rigid heavy-gauge expanded mesh
used behind common wall substrates to protect against breakins
and break-outs. This high-strength security mesh is tough to
smash or cut and safeguards walls and ceilings in homes, apartments,
offices, stores, storage areas and correctional facilities.
Installation
Lath should be applied with the long
dimension across supports and with end
joints staggered between courses. The
ends of the mesh lath should be lapped 1",
and the sides should be lapped at least
1/2". Check lap minimums required by
local code. Nail, screw or staple-attach
mesh lath on walls, so that the lower sheets
overlap the upper sheets. Lath also may be
wire tied to the furring channel for ceiling applications. If an
end lap should occur between supports, the two sheets
should be laced or tied using 18-gauge tie wire. Secure lath to
all supports at intervals not exceeding 6". Mesh lath should be
formed into corners and carried out onto an abutting surface.
Where this is not possible, Cornerite, an internal plaster angle
reinforcement should be used.
Paper-Back Installation
Installation of paper-backed lath is best accomplished when
metal-to-metal and paper-to-paper contact is maintained.
Dietrich Metal Framing uses asphalt-saturated paper meeting
Federal Spec. UU-B-790a as backing on metal lath products.
This paper provides a water- resistant barrier that is a
vapor-permeable backing consistent with grade D, style 2
paper (other grades and styles are available upon request).
Minimum lap requirement for Jr. Diamond Mesh, Self-
Furring and 1/8" Flat Rib Laths is 1/2" at the sides and 1" on
the ends which can be easily attained with either “P” (paper
offset 1" on one side and one end) or “S” (paper flush on
sides and offset 1" on ends) applications. ASTM C-1063,
requires a 2" minimum paper lap on all sides. Dietrich’s
paper offset option “O” conforms to
this specification. Make sure to consult
your local building code to
ensure proper compliance.
Metal Lath Overview
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