PART 3
EXECUTION
3.1
Framing shall be installed as indicated.
3.2
CONTROL JOINTS
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NOTE: Control joints will be shown on the drawings.
Control joints shall divide stucco into areas of
not more than 13 square meters (144 square feet)
with no dimension between control joints greater
than 5.4 meters (18 feet). The length to width
ratio of the area bounded by the control joints will
not exceed 25 to 63 mm (1 to 2-1/2 inches).
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Control joints shall be located as indicated on the drawings.
Prefabricated control joint members shall be installed prior to the
application of the stucco. Control joints shall be cleared of all stucco
within the control area after stucco application and prior to final stucco
set.
3.3
LATH
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NOTE: Drawings will clearly indicate where metal
lath is required. Metal lath will be used over
metal supports and wood supports. Metal
reinforcement with water-resistant paper is
recommended in all steel frame construction and
suspended ceilings. The use of metal reinforcement
over concrete and masonry will be in accordance with
local practice based upon satisfactory experience.
Paper backed lath may be applied to interior
concrete and masonry when adequate and uniform bond
cannot be obtained otherwise, and when the lath will
be protected from moisture.
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Lath shall be installed in accordance with ASTM C 841 or ASTM C 1063 except
as otherwise specified. Metal and wire lath shall be applied straight,
without buckles and with joints staggered. End laps of metal lath shall be
not less than 25 mm 1 inch. When paper-backed lath is used, the paper
shall be split from the lath at all lap areas to provide a paper to paper
and lath to lath lap. Horizontal joints shall be shiplapped. Lath shall
be interrupted at all control joints.
3.3.1
Steel and Wood Supports
Metal lath without integral backing over vertical open or solid wood and
steel backing frame construction shall be applied only after a backing of
shiplapped waterproofed building paper or other approved material has been
applied to the area to receive the stucco. Lath shall be secured to the
wood frames with nails or staples spaced not over 150 mm 6 inches on
centers along each support; and where sheets of lath are lapped, fasteners
shall be driven so as to hold both lapped edges securely in place. Lath
shall be secured to steel frames in accordance with ASTM C 841 or ASTM C
SECTION 09225
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