Open cell vs closed cell
I am renovating my daughter’s room located on the second floor of the house. I got a estimate from a spray foam company. They recommended 6 inch open cell in between my ceiling 2×8 rafters. On the west side exterior wall with a brick wall in the center of the wood frame (chimney) they want to apply 3 inch closed spray foam in 2×4 wall. I believe I am in zone 4a. My question is: is the open cell the right product and do I need a vapor barrier?
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