VAPOR BARRIERS
Are you looking for other vapor barrier or crawl space tips? For more info on crawl space projects, check out our article on How To Treat Crawlspace Mold or Whether To Leave Your Crawl Space Insulation Faced or Unfaced. More From Doityourself...
Anair barrier, situated on the exterior of the building envelope, acts as a shield against the infiltration of air through the structure. It can be fashioned from various materials such as house wrap, plywood, or gypsum board sheet products. In contrast, avapor barrier, located on the interio...
Twitter Google Share on Facebook Vapor retarder Layer that inhibits vapor diffusion through a building envelope. Examples include polyethylene sheeting, foil facing, kraft paper facing on batt insulation, and low-permeability paints. Most building codes define a vapor retarder as 1 perm or less, wit...
The building code is written to be as flexible as possible so you have options. For example, you could install a Class I vapor barrier, such as poly, on the interior and stick with “20 + 5” (R-20 cavity insulation + R-5 continuous insulation). Even though the poly and the foam ...
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