Cut and cobble?
Hello, I have a house with a gabled roof that was built in 1913 in Pinehurst, NC. It is in climate zone 3. The original skip sheathing is still present, covered by plywood and asphalt shingles. I have a ridge vent, but no soffit vents. I want to insulate my 2×6 rafters and vault the ceiling while leaving the collar ties exposed. I’m thinking I should use the cut and cobble method of insulation, maintaining an 1 1/2” air space beneath the skip sheathing especially since we would ultimately like to replace the asphalt with cedar shake. I’m planning on installing 4 layers of 2” foam board, 2 layers in the rafter bays, and 2 layers screwed to the rafters with staggered and taped seams. I’m also thinking I should retrofit soffit vents. Any advice is appreciated! Thank you!
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