Insulating a cathedral ceiling
Question in regards to cut and cobble method for an invented cathedral ceiling.
I’ve read and think I understand that you could cut the rigid foam to fit between the joists on the ceiling. It seems that getting that sealed is important and some people suggest spray foam to seal or caulk. I’m wondering why not just add an additional layer of rigid foam directly on the ceiling joists on the inside once the bay is filled. Couldn’t this seal the bay?
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