The roof drain assembly integrates into wood roof sheathing supported by structural framing. Tapered rigid insulation creates a sump around the drain bowl. A reinforced waterproof membrane extends beneath the drain flange and is sealed with flashing sealant. The drain is installed per manufacturer specifications.
ROOF SHEATHING, SEE STRUCTURAL FOR DRAINS WITH TAPERED RIGID INSULATION OR EQUAL AT DRAIN SUMP LESS THAN 3 INCHES TO 1 HORIZONTAL FOOT ROOF DRAIN, INSTALL PER MANUFACTURER SEALANT REIFORCED MEMBRANE RIGID INSULATION
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