Architectural · A-YA62K

Vapor Barrier and Waterstop at Slab Penetration

Materials

Elements

Floors / Slabs Waterproofing / Flashing Drainage Roof / Floor Openings

About this detail

A concrete slab on grade bears on drain rock over filter fabric and compacted soils. A continuous vapor barrier is installed beneath the concrete slab with a minimum six inch tape lap and a one inch minimum waterstop at the penetration interface. The vertical penetration includes a waterstop detail providing three inches minimum concrete coverage above and specified minimum clearances around the opening. Joints and seams in the vapor barrier are sealed with four inch wide vapor barrier tape and two inch minimum tape coverage.

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