Wall Vapor Retarder - Wall Vapor Barriers
Npt/Hose Adapter; Pipe Boots; ... that air leakage through a hole of less than one square inch can allow passage of up to nearly eight gallons of water into the building envelope over the course of a single heating season resulting in mold and decay problems. ... 3 ply. Combines HDPE/LLDPE & aluminum to provide extremely low permeance for ...
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