Cathedral ceiling insulation
I currently have 2×8 rafters with vents and fiberglass insulation. Have found mold problem on inside of exterior roof sheathing.
I want to remove roof sheathing and insulation start over. I would like to not have to demo the interior sheet rock.
I am in Located in Maine. I was thinking fiberglass or similar between rafters, with foam board on exterior of roof. My question is what should be the layers from drywall to shingles to properly insulate? What type of foam board? Thickness?
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