I’m remodeling with an unvented Cathedral ceiling in Climate Zone 4. I have asphalt shingles, underlayment the rafter cavities that are 9″ deep which were filled with faced High density… I’m remodeling with an unvented Cathedral ceiling in Climate Zone 4. I have asphalt shingles, underlayment the rafter cavities that are 9″ deep which were filled with faced High density…Read MoreGreenBuildingAdvisor
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