We built a home 11 years ago with 5 inches of Icynene sprayed against the 1/2-inch plywood sheathing, no vent, in our cathedral ceiling.
12 inch I-beam rafters from soffit to ridge, no vapor barrier.
After energy audit it was recommended to fill remaining 7 inches with dense-packed cellulose. Heat is a wood stove and radiant flooring, minisplit for AC and auxiliary heat.
We are in southern Wisconsin Zone5A/6B.
What are your thoughts?
Thank you in advance,