Flash and batt
I have been reading on the site about flash and batt but don’t think I am “getting it”. I live in south central Kentucky ( zone 4A) and have a woodworking shop built in the rear of a 1970 built garage. I have insulated the walls with fiberglass and have put tongue and groove pine over that.
I have put in a ridge beam so I could create an open space in there to work by removing the ceiling joists. Because the rafters are 2×6 I have also had to put in a couple intermediate beams to minimize any deflection in the roof.
I have had closed cell foam sprayed on the ceiling. It probably averages about 1 1/2″ with some areas being more. I plan on putting the same pine tongue and groove on the ceiling but am wondering if the foam is adequate so have been considering putting in some faced R19 fiberglass. With the rafters being 2×6 and 1 1/2″ taken up by the foam I thought that the R19 would be a good tight fit with no voids. Can you give me your opinion on if this is a good idea and if condensation would occur, or what would happen if I just put the pine over the foam alone with no fiberglass?
Also, My roof decking is 95% those old pine boards (I think pine) with a piece here and there of OSB from old roof repairs and a single layer of shingles.
Can anyone help?
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