How can I best install rigid foam as I finish my attic?
I'm finishing off my attic. The plan is to use fiberglass between the old true 2x6 rafters, which will be vented with baffles. I then want to put lots of rigid foam on top of the rafters, as I'm in a cold climate in upstate New York. I'm thinking 4 inches.
How can I find screws to long enough to fasten the furring strips through the foam to the rafters?
Will the foil-faced foam act as an adequate vapor-barrier as long as I seal the seams with aluminum tape?
Need I use any special drywall on top for adequate fire protection?
Posted Oct 19, 2012 1:51 PM ET
Edited Oct 19, 2012 1:59 PM ET
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Minisplit setup for New Jersey, 750 sq. ft. house over crawl. Bouncing my HVAC contractor's plan off you guys.