Drain in modified bitumen roof

Roofing · Flat Roof Flashings · printed page 28 (PDF page 29)

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Drain in Modified Bitumen Flat Roof Modified Bitumen Flashings

Text in the illustration

roof membrane
collar of roofing material secured over flange
roofing material collar cut away to show overlap with flashing flange
strainer or (bird cage)
3" flange
roof joist
roof drain
waste pipe
cross section

Generated explanation

The illustration shows a drain in a modified bitumen flat roof, with a surface view and an enlarged cross section. A domed bird-cage strainer covers the drain opening, which connects to a waste pipe below. The drain's 3-inch flange extends onto the roof assembly, and a collar of roofing material is secured over it. A cutaway in the surface view exposes the collar's overlap with the flashing flange. Roof joists are shown beneath the roof on either side of the drain.

Components

roof membrane roofing material collar drain flashing flange bird-cage strainer roof drain waste pipe roof joists

Materials

modified bitumen roofing wood

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