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This is a woven polyethylene vapor barrier for encapsulating crawl spaces, sold in 8-foot-wide rolls of 50 or 100 feet. It is a true 12-mil sheet with a perm rating of 0.03, made in the USA from virgin material in a one-piece design with no laminated layers to separate. That puts it against reinforced and string-reinforced liners: the woven scrim adds tear resistance, and the low perm rating blocks ground moisture well. It suits homeowners and contractors sealing a crawl space who want a heavy, puncture-resistant sheet rather than thin 6-mil plastic.
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Buyers rate it highly, with a 5 out of 5 average across 11 ratings. They describe it as thick and durable, and several say it holds up better than thinner liners.
This is a 12-mil woven vapor barrier for crawl spaces. It is the same material Crawl Space Ninja franchises use when professionally encapsulating homes. It is made in the U.S.A. from virgin material.
A woven polyethylene core reinforces the sheet for added tear resistance and strength. The barrier is still a solid, one-piece sheet. It has no glued layers, so the layers cannot peel or separate over time.
The 12-mil thickness is measured across the full sheet, not just at the thickest point. No adhesives are used, so the barrier has no "cat urine" odor that can come from glued or laminated products.
