Climate 3b unvented cathedral roof insulation (a-frame house) Open cell or closed cell is it a tossup?
As the title says, open cell or closed cell unvented cathedral ceiling zone 3b? I’m awful close to zone 4 in Athens, GA. Is it a toss up and if so which. I know open cell is going to be a bit cheaper (but not by much) at 10-11″ vs closed cell at 5″. Standing seam roof so not much drying to the outside. This article says 5″ of closed cell will still dry to the inside in the summer:
Is that true?
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