NOTE: This guide specification presents
nonproprietary materials. When the guide
specification is edited or supplemented to suit
project requirements, care shall be exercised to
present a project specification section which
contains no proprietary materials.
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2.1
LATH
2.1.1
Metal Plastering Base (Lath)
Provide the type(s) and weight(s) required for the type and spacing of
supports shown for the kind of plaster indicated and specified. Do not use
rib lath for ceramic tile scratch coat.
2.1.1.1
For Portland Cement-Based Plaster (Stucco)
ASTM C 1063, [diamond mesh] [self-furring diamond mesh] [flat rib] [10 mm
3/8 inch rib] [20 mm3/4 inch rib] [sheet] [welded wire] [woven wire] metal
lath weighing not less than [_____] kilograms per square meter pounds per
square yard.
2.1.1.2
For Gypsum Plaster
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NOTE: Consult Table 2 in ASTM C 1063 and Table 1 in
ASTM C 841 to determine the type and weight of the
metal lath based on the type and spacing of the
support system shown on the project drawings.
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ASTM C 841, [diamond mesh] [self-furring diamond mesh] [flat rib] [10 mm3/8
inch rib] [20 mm3/4 inch rib] [sheet] [welded wire] [woven wire] metal lath
weighing not less than [_____] kilograms per square meter pounds per square
yard.
2.1.1.3
Paper Backing (Waterproofed Kraft Building Paper)
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NOTE: Specify "Moderate water-vapor Resistant"
where moisture protection or use of vapor barrier is
required. Specify "Water-vapor permeable" to
maintain hollow partitions plaster free, to prevent
plaster from bonding to substrate, to prevent over
spray where plaster is sprayed on, to provide
uniform plaster thickness and to improve bonding
(keying). Edit paragraph as required.
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Provide metal plastering base with paper backing, ["Moderate water-vapor
Resistant" for room(s) [_____]] ["Water-vapor permeable" for room(s)
[_____]] [and] [for exterior plastering work].
2.1.1.4
Galvanized Metal Plastering Base
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NOTE: Specify galvanized metal plastering base for
all exterior plastering and for plastering interior
SECTION 09205N
Page 5
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