vinyl wallpaper

Vapor Retarders and Vapor Barriers

Posted on March 30,2015 by user-756436 in polyethylene

Although building science has evolved rapidly over the last 40 years, one theme has remained constant: builders are still confused about vapor barriers. Any energy expert who fields questions from builders will tell you that, year after year, the same questions keep coming up: Does this wall need a vapor barrier? Will foam sheathing trap moisture in my wall? How do I convince my local building inspector that my walls don’t need interior poly?

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