Perm
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All About Vapor Diffusion
Even if a material has no holes, water can often move right through it
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Do I Need a Vapor Retarder?
Someday, builders will stop asking this recurring question — but unfortunately, that day has not yet come
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Joe Lstiburek Discusses Basement Insulation and Vapor Retarders
An all-day seminar with Dr. Joe yields two news stories, a six-digit idea, and plenty of quotable opinions and conclusions