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What do you recommend for a crawl space vapor barrier?

Its surrounded by frost wall. Wood floor system 2' above. Will 6mil plastic do? How about fastening / sealing to concrete frost wall?

Asked by K Greenblott
Posted Oct 11, 2012 3:15 PM ET


1 Answer

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K. Greenblott,
You can use 6-mil poly, although a product like Tu-Tuf or even a 20-mil swimming pool liner will be tougher (which might matter if people visit the crawl space often).

More information here: Building an Unvented Crawl Space.

Answered by Martin Holladay, GBA Advisor
Posted Oct 11, 2012 3:56 PM ET

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