open vs. closed cell spray foam in crawlspace
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!