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plschwartz 01-21-2013 09:17 AM

exterior curved roof insulation.
I will build a Japanese style garden outbuilding with a curved roof. The plans come from S. California but the build is in the Northeast. The ceiling will be exposed knpotty pine or spruce
To extend its use into the cooler seasons I will use an electric heater. But would like to put something with insulating value on the exterior of the roof below shingles. It needs to be flexible to follow the roof curve.
All suggests appreciated.

joecaption 01-21-2013 09:38 AM

It would help is you added your location to your profile.
It would be great if somehow you could post the web site or something so we could get an idea on what this is going to look like.
One way I've seen it done was with 1-1/2 X 6" T&G then they used SIP roofing panels for added insulation and a nailing surface for the roofing.
The panels I saw used were only 1-1/2 thick. And were held down with special scews with large washers.
Wood only has an R value of only 1.25 per inch I believe.

plschwartz 01-21-2013 01:00 PM

1. I live in long island NY
2.picture is
The roof is actually curved. From woodsshop .com
So what I need is relatively thin and flexible as I want to keep the roof curve.
Over the planks should I put down tyvek, radiant barrier and or what?

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