...unvented flat roof ceiling. It's impossible to air seal all the joints and sistered joists with caulk or sealant because where the SPF meets the joints, the sea...
...ceiling.
I'm leaning towards not venting my cathedral ceiling and using closed-cell spray foam insulation. My walls are double 2x4 stud walls 12 inches deep a...
...ceilings (standard scissor trusses). It was built in the mid 1990s to the R-2000 standard. I am looking to take it to a passive house level and have been lookin...
