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Community and Q&A

What do you recommend for a crawl space vapor barrier?

user-1145893 | Posted in Green Products and Materials on

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


  1. GBA Editor
    Martin Holladay | | #1

    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.

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