Another Cathedral Ceiling 1.5″ Vent, 5 inches of Closed Cell, then…..
I am getting close to finishing my site built baffles going from the soffit to the ridge. Then I get an insulation quote about 2lb Closed cell +/-5 inches in the ceiling for almost the same price as BIBS.
Can I have dense packed cellulose placed after the 5 inches of foam (~10.5 inches total depth currently)? I had planned on a vented roof for fluffy stuff, but what do you think?
With the fluffy, I was going to go with 16″ O/C perpendicular 2×4 to deepen the cavity, and use polyiso board to air seal it under the final finish.
If I do Spray foam, would I still need to worry as much about the air sealing under the final finish?
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