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open vs. closed cell spray foam in crawlspace

Posted by churchie (My Page) on
Sat, Dec 15, 07 at 10:29

First time poster, I've been trying to answer a basic question, is it better to use open or closed cell in sills and concrete block crawlspace walls. I am concerned about closed cell being a vapor retarder, I've asked 4 contractors the same question and also queried buildingscience.com articles and can't get a definitive answer. I happen to think letting a foundation 'breathe' is a good thing.

If this is covered on another thread please redirect me, thanks for your help!


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RE: open vs. closed cell spray foam in crawlspace

Not sure, but probably closed, since it won't absorb moisture.

Maybe there's a clue here:
http://www.rd.com/familyhandyman/content/17606/


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