We just purchased a tiny vertical log cottage in NJ and are attempting to retain the 1937 period look of raw open ceiling, (3×6 roof rafters on 24″ centers with tongue & groove roof sheathing). The asphalt roof is in need of replacement, opening the possibility of insulating the roof above the sheathing using foam insulation, covered by plywood sheathing and then a new asphalt roof. This would retain the appearance and heat in winter.
Does anyone know if this is a bad practice regarding condensation between the original roof sheathing and the foam insulation, which would cause roof rot?
We have talked to a roofer we previously worked with, and he has used it this way recently on a cottage of his own, but we still have concerns.
Bobalu
Sparta, NJ
Replies
I believe it can be done. The insulation does not rest on the roof, but is spaced above it with 2 x 3's or 1 x 3's. There are certain details about ventilation that I'm not that knowledgeable on.
If you ask in Breaktime you'll find a lot more contractors will see your post.
Thanks for the input. I'm new to this site, and I think it will be of great help given the project we are tackling.
Bobalu