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CertainTeed MemBrain 3/4 vapour retarder

January 9, 2012 - CertainTeed describes its MemBrain vapour retarder as the first of its kind which breathes and allows excess moisture to escape from wall cavities. The product is a polyamide film which changes permeability from less than one perm at low humidity (such as during winter) to greater than 20 perms at high relative humidity. MemBrain is used in place of traditional polyethylene vapour retarders with unfaced fiberglass insulation to provide an insulation system that is ideal for areas with seasonal changes in temperature and humidity by helping to reduce the risk and liability concerns due to excess moisture, adds CertainTeed.

CERTAINTEED