Architectural · A-7WA7D

Rain Water Leader Penetration at CLT Roof

Materials

Steel Stainless Steel Timber / Wood Metal (misc.)Membrane / Roofing

Elements

Beams Roofs Decks Waterproofing / Flashing Anchors / Embeds Connections / Plates Roof / Floor Openings

Connections

Deck Attachment Embed Plate Timber / Mass-Timber Connection

About this detail

A rain water leader pipe penetrates a cross-laminated timber roof assembly. The structural deck is composed of a roof deck as scheduled, insulation, a cover board, and a two-ply styrene-butadiene-styrene roofing system with a flashing ply. A sheet metal or four pounds lead pipe wrap sits with its primed flanges set in compatible mastic or cement, providing an eight-inch minimum dimension. A sheet metal flashing collar is fully embedded in sealant, fastened with a stainless steel hose clamp and stainless steel fastener. Additional sealant tape and compatible tooled sealant are applied at joints to shed water. The vertical steel tube member receives compatible sealant or roofing cement and rests above a steel beam where it occurs.

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