Vapor barriers repel moisture infiltration from the ground into the crawl space. ... This is a Class 1 vapor barrier, which is the most impermeable and offers the best moisture protection.

Class I vapor retarder – 0.1 perm or less. Class II vapor retarder – 1.0 perm or less and greater than 0.1 perm. Class III vapor retarder – 10 perm or less and greater than 1.0 perm (Per Canadian ...

“This new and improved suite of vapor barrier systems addresses the market’s need for a full line developed specifically for this industry that is proven to be superior at providing the ...

Dublin, Sept. 14, 2021 (GLOBE NEWSWIRE) -- The "Global Polyethylene Vapor Barrier Films For Under Slab Market Size, Share & Trends Analysis Report by Product (HDPE, LLDPE), by Application, by ...