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churchie_gw

open vs. closed cell spray foam in crawlspace

churchie
16 years ago

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!