Architectural · A-M4KDD

Typical Roof Drain and Overflow Drain Sections

Materials

Elements

Columns Beams Roofs Vaults / Domes Waterproofing / Flashing Insulation Drainage Anchors / Embeds Roof / Floor Openings

About this detail

A roof drain and overflow drain assembly is integrated into a roof assembly consisting of single-ply roofing, insulation, and metal roof decking over secondary structural supports and roof joists. The drain body, sump receiver, and underdeck clamp are secured mechanically, with an extension sleeve utilized on the overflow drain. A PVC pipe boot is fully adhered to the single-ply roofing and secured with a stainless steel drawband, featuring a full bed of sealant sloped to shed water and a penetration sealed with spray foam insulation. A roof anchor is provided with a half-inch diameter hole for filling the pipe with spray foam insulation and is attached to the roof framing per structural drawings.

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