1063, as applicable.
3.3.2
On Concrete and Masonry
Lath shall be fastened every 200 mm 8 inches vertically and every 400 mm 16
inches horizontally. Where wood supports adjoin masonry or concrete in the
same direction, casing bead, control joints, or reinforcement shall be
provided as indicated.
3.3.3
Over Metal Lintels and Flashings
Lath over metal lintels shall be extended vertically over the angles to a
height of not less than 150 mm 6 inches and horizontally across the
underside of the lintels and shall be secured in an approved manner. Lath
over metal flashings shall lap the flashings not less than 50 mm 2 inches
and shall be extended vertically for a height of not less than 150 mm 6
inches.
3.3.4
Special Shapes, Profiles, and Contours
Special shapes, profiles, and contours shall be formed with wood, metal or
aluminum furring and reinforcing.
3.4
FURRING
Furring shall be installed to true lines and surfaces and shall be rigidly
supported and secured in place.
3.5
PREPARATION OF SURFACES
Preparation of surfaces for application of stucco to solid bases such as
stone, masonry or concrete shall conform to the applicable requirements of
ASTM C 926.
3.6
PROPORTIONS AND MIXING
Proportions and mixing for job-mixed base coat and finish coat shall
conform to the applicable requirements of ASTM C 926. Mixing of mill-mixed
finish coat shall be in accordance with the manufacturer's directions.
3.7
STUCCO APPLICATION
Stucco shall be applied in three coats to a thickness of not less than 25
mm 1 inch as measured from the back plane of metal reinforcement, exclusive
of ribs or dimples or from the face of solid backing or support, with or
without metal reinforcement, to the finished stucco surface, including
moderate texture variations. Stucco application shall conform to the
applicable requirements of ASTM C 926 and the following:
3.7.1
Workmanship
Items or features of the work in connection with or adjoining the stucco
shall be in place, plumb, straight, and true prior to beginning the stucco
work. Metal and wire lath, where required, shall be in place and
positioned to provide a good key at back of lath. Where lath is applied
over copper, the copper shall be given a heavy coat of bituminous paint.
Masonry surfaces to receive stucco shall be evenly dampened immediately
prior to application of stucco. Each stucco coat shall be applied
continuously in one general direction, without allowing mortar to dry at
SECTION 09225
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