This assembly consists of a clad metal scupper integrated into a roof system with a plywood or oriented strand board deck and a 1/4-inch protection board. The 60-mil TPO single-ply membrane is secured to the deck, with a TPO flashing strip hot-air welded to the membrane and the scupper flange. The scupper is fastened at 4 inches on center in a staggered pattern, with cut edges sealed. A continuous bead of urethane sealant is applied along all four sides at the juncture with the outside wall surfaces, and the scupper is required to extend 2 inches past the back side of the wall. A painted 24-gauge galvanized downspout connects to the exterior of the scupper.
4" MIN. NOTE: 1) PROVIDE CONTINUOUS SEALANT ALONG FOUR SIDES AT JUNCTURE WITH OUTSIDE WALL SURFACES. URETHANE SEALANT SCUPPER TO EXTEND 2" PAST WALL BACK SIDE OF SCUPPER FIELD VERIFY FIELD VERIFY FIELD VERIFY 2" 6" 4" 4" 4" 60 MIL TPO SINGLE PLY FLASHING -FULLY ADHEARED CUT EDGE SEALANT TPO FLASHING STRIP HOT - AIR WELD CLAD METAL SCUPPER FASTENED 4" O.C., STAGGERED CUT EDGE SEALANT TPO FLASHING STRIP HOT - AIR WELD 60 MIL TPO SINGLE PLY MEMBRANE FASTENER 1 1/2" = 1'-0" 9
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