Subtopic 2.0403 Vapor Barriers

Durable, effective ground moisture barrier provides long-lasting access and minimizes ground vapor

Durable, effective air barrier Air barrier The separation between the interior and exterior environments of a building that slows air flow to the point that no smoke movement is visible at 50 pascals of pressure difference across the boundary and ground moisture barrier provide ongoing access and minimize ground vapor

Durable, effective vapor retarder Vapor retarder A material that slows the passage of water vapor and contains a perm rating above 1 minimizes leakage from ground and air

Durable, effective ground moisture barrier that provides ongoing access and minimizes ground vapor