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• Repeat this procedure on all four sides.
• Trim extra material prior to sealing.
• Cut, fold, and glue roof membrane using contact cement (not provided)
• Position flashing to corner and form to fit by applying hand pressure to outside edges. Secure the corner
flashing to the sidewalls.
Install to existing wall
• Allow membrane to extend up the existing wall approximately 6".
• Position 2 1/2" cove and fasten.
Apply contact cement or caulk (not provided by W. A. Brown) along the top joint where the cove joins the wall,
down the edge at each end of the cove and down the edge of flashing at the wall.
Duro-Last
®
Roof Cap Installation (for outside installation)
The following are general instructions for installing the Duro-Last system. (See Figure #10)
• Surface Preparation: The Walk-In Top must be clean, smooth, free of sharp edges, loose debris and
standing water.
• Placement: Select proper pre-manufactured and marked rolled sheet of Duro-Last membrane according to roof
lay-out diagram. Orient roofing membrane so the 3" wide fastening tabs are perpendicular to Top Panel Joints.
Secure to Walk-In through 3" fastening tab with approved fasteners and plates in accordance with specifica-
tions. Unfold Duro-Last membrane over tab. Continue unfolding until next 3" fastening tab appears. Repeat
above procedure until entire sheet is fastened in place. Make sure to have 6" overhang on each side before
starting fastening.
• Protusions: During the aforementioned procedure, make cutouts in the Duro-Last membrane for protusions.
Fasten around cutouts with Duro-Last approved fasteners. The skirts on the factory fabricated accessories,
when welded to the deck membrane, will cover these cutouts.
• Breather Vents: For every 1,000 square feet of deck membrane install a Duro-Last two way vent. Install
vents according to Duro-Last specifications.
• Parapet Walls: Use custom fabricated parapet wall flashing designed specifically for each individual application
and roof. Secure through 3" fastening tab at bottom of parapet wall using approved Duro-Last fasteners and
plates, thus holding down edge of deck membrane. The dielectrically welded skirt will cover these and is then
welded to the deck membrane.
Install 2 x 6 flashing as noted on page 7.
8
Factory Welded Laps
Every 57" Throughout
Section
Duro-Last
Membrane
Factory Welds
Duro-Last Stress Distribution
Plates and Approved Fasteners
Fastened 12" On-Center
30"
Figure #10
Termination bar with Durolast
®
in
hem of 2 x 6 flashing
Reversed Lap
(Facing Edge)