A-frame insulation


Old 07-15-10, 06:20 PM
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Join Date: Jul 2010
Location: USA
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A-frame insulation

I am going to put sheets of Owens Corning foamular 150 2" rigid sheets of insulation foam on the interior of my A frame house (the house currently has no insulation---just the 2x6 boards that form the walls/ceiling, a 1" thick compressed fiberboard of some type (not sure) on the outside of that, and then the shingles. I am going to put the foam directly in contact with the underside of the 2x6 boards and then cover them on the inside with 5x8" thick T1-11 grooved plywood 4x8' sheets that have been stained. I know this is not an ideal way to insulate a house---but its what I've got. (Everything about this A frame is non-standard.) My question: do I need to put a vapor barrier (i.e, thin plastic sheating) between the plywood and the foamboard --- or is the foamboard enough of a vapor barrier in itself?
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Old 07-16-10, 04:57 AM
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Moved your post to a fresh thread, Q.

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