Architectural · A-WD4A7

Vapor Barrier Penetration at Concrete Slab on Grade

Materials

Elements

Floors / Slabs Waterproofing / Flashing Drainage Roof / Floor Openings

About this detail

A concrete slab on grade rests over compacted soils and four inches of drain rock placed over filter fabric. A continuous vapor barrier is sealed with a two-inch minimum vapor barrier tape and a four-inch wide vapor barrier tape at joints and penetrations. A waterstop is embedded in the concrete with a minimum coverage of three inches and a one-inch minimum clearance. A six-inch minimum overlap is provided at vapor barrier seams.

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