400 THROUGH WALL FLASHING
04 05 23.16 MASONRY EMBEDDED FLASHING
04 05 23.19 MASONRY CAVITY DRAINAGE, WEEP HOLES, AND VENTS
PART 1 - GENERAL
A. Provide self-adhering rubberized asphalt flashing as indicated on the drawings.
1.02 RELATED SECTIONS
A. 042000 UNIT MASONRY
B. 044000 UNIT STONE
C. 076660 THERMAL AND MOISTURE PROTECTION
1.03 REFERENCE STANDARDS
A. ASTM-D-781 - Puncture Resistance (Film)
B. ASTM-E-154 - Puncture Resistance of Composite
C. ASTM-D-412 (Modified) - Tensile Strength of Composite
D. ASTM-D-882 (Modified) - Elongation of Rubberized Asphalt
E. ASTM-E-96 (Method B) - Water Vapor Transmission
F. ASTM-D-36 Softening Point of Rubberized Asphalt
1.04 DELIVERY, STORAGE, HANDLING:
A. Deliver materials in original, unopened manufacturers’ containers.
B. Protect all materials from weather. Assure that all lids remain tight.
C. Protect all materials from exposure to fire and excessive heat.
D. Installer to maintain all MSDS forms on site during installation.
PART 2 - PRODUCTS
A. Provide Polyguard 400 TWF flashing membrane, 40 mils thick with a laminated
facer and split release sheet backing or equal.
(Provide the listed materials or equal. Use a single source manufacturer for
flashing membrane and accessories to maintain a single source warranty.)
A. Polyguard 650 LT Solvent Based Liquid Adhesive, Polyguard Shur-Tac Water
Based Liquid Adhesive, or in California, Polyguard California Sealant.
B. Polyguard [304 Stainless Steel] [316 Stainless Steel] [12 oz. Copper] Drip Edges
and Fittings in areas above pedestrian traffic; Polyguard [304 Stainless Steel] [316
Stainless Steel] [12 oz. Copper] 1-inch Drip Counters and Fittings in pedestrian
traffic areas and; Polyguard [304 Stainless Steel] [316 Stainless Steel] [12 oz.
Copper] 1-1/2-inch Drip Counters and Fittings at wall to roof intersections.
C. Polyguard TWF Cants or Polyguard LM-95 formed cants.
D. Polyguard Pre-formed TWF End Dams and Corner Boots.
E. Polyguard Flared Termination Strips in cavity walls and Polyguard Termination
Tape in Non-Cavity Walls.
F. Polyguard 650-Mastic or Polyguard Detailing Sealant.
G. Polyguard Horizontal Weep.
PART 3 - EXECUTION
A. Clean surfaces that will be receiving Polyguard TWF membranes and components
so they are free of dust, scale, and dirt. Dry surfaces to a 12% moisture content or
B. Remove surface irregularities that could puncture the Polyguard TWF membrane.
A. Select a Liquid Adhesive based on substrate compatibility and VOC compliance.
Provide a brush or roller applied Polyguard Liquid Adhesive to all surfaces that will
receive flashing components. Apply at a rate of 250 - 300 square feet per gallon.
Do not thin Liquid Adhesive.
B. Provide   stainless steel or [12 oz. copper] projecting flange
edges/counters as the UV exposed part of the TWF assembly.
C. Provide Polyguard TWF Cants or, form Polyguard LM-95 into a 1-inch cant, to
establish a positive pitch away from the backing wall along the bottom of a
drainage plane. Provide Polyguard TWF Cants to support TWF membranes over
gaps greater than 1/8-inch.
D. Provide Polyguard Preformed TWF End Dams at discontinuous flashing ends and
Preformed TWF Inside and Outside Corner Boots at continuous ends of corner
E. Provide Polyguard 400 TWF membrane. Remove the 3-inch split release sheet
and position and adhere that part of the flashing so the flashing will have a
minimum 8-inch vertical leg; and so the lower part of the flashing will interface flat
with the lower part of the wall and intersecting ledge; and so the forward edge of
the flashing is not closer than 5/8-inch to the bend in the drip and, covers a
minimum of 1-inch of the drip. Adhere and smooth the lower part of the flashing to
the substrate while removing the release paper in 2 to 3-inch increments. Lap
flashing ends a minimum of 2-inches and overlap rows 2-inches in a shingle
F. Apply pressure over the face of installed Polyguard 400 TWF with a blunt edge
squeegee or rubber roller.
H. Provide top edge flashing termination in cavity walls using Polyguard Flared
Termination Strips fastened to the framing members. Provide top edge flashing
I. termination in non-cavity walls using Polyguard Termination Tape.
J. Provide a bead of Polyguard 650-Mastic or Detailing Sealant to: fill the area
between the forward edge of the Flared Termination Strips and the backing wall
and; be shaped along the top edge to establish a positive pitch away from the
backing wall. Provide a bead of the same material along flashing end lap edges.
Dimension the bead 3/8-inch wide and 3/16-inch deep; center the bead over the
edge and; shape the bead to a uniform and even coverage.
K. Provide Polyguard Horizontal Weeps over and along the installed 400 TWF with
the weep extensions extending beyond the face of the forward edge of the wall.
Trim weep extensions flush with the face of the exterior finish after the mortar joints
have been tooled.
04 05 23 Masonry Accessories
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