Quote:
Originally Posted by island911
I would think that painted ceiling would help you out if you choose to skip the venting. That is it's a vapor barrier to the wood.
So on skipping the venting; if it were my house, I would accept that the construction is what it is --Venting was not part of the original design-- and move along. ...Add another vapor barrier under the Cedar (or whatever).
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Pretty much where I'm at... The Thermax has 1 mil alum foil on both sides and spray foam isn't going to be as affective nor have a moisture barrier.
When we re-roofed, the 2" T&G was in great shape, even in the carport (you should see those beams).