Attic ceiling project
OK…read lots, know lots, but have a tough situation: 1924 unvented hot/cold attic, shallow rafters (4″), plank roof deck, asphalt shingles/tar paper and wishing to finish the attic space for office/play area. Previous owner installed very thin layer of foil faced batt against roof deck at least 15 years ago–no thermal impact, but more importantly there has been no moisture issues for the past 43 years (28 him, 15 me). I really don’t want to go closed cell spray. Instead, I am figuring scabbing the rafters to get 6″ depth, then faced glass batts in the cavities against roof deck and rigid/taped seams over that for thermal bridging, then T&G pine for finished ceiling. I know T&G is not anywhere close to air/moisture barrier, but I’ve zero moisture issues in the past with the tiny amount of foil faced batt that has been there for at least the past 15 years, so just don’t think I am getting much moisture laden air up there in the first place…my rationale for not doing drywall. I know I won’t hit a code requirement for thermal, but this is not a permanent living space–just looking to add some comfort level for when the space is being used. Crazy? Better ideas? Thanks!
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