A fully soldered galvanized scupper box penetrates the parapet wall with three-inch flanges extending along the surfaces. A one-half-inch drip edge projects from the exterior face of the scupper. Spray foam insulation is applied around the perimeter of the parapet penetration. The adjacent roof assembly maintains a slope of one-quarter inch per twelve inches towards the scupper, detailed with a pre-coated roofing membrane.
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