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This may be an odd question - I am planning to insulate my shed/workshop and add air conditioning. It will be used off and on and will at times be unoccupied. I am planning on using fiberglass batts (R-13) for the wall and cover with plywood. Are there any pluses to used unfaced batts and add plastic sheeting or can I just use paper faced batts?
 

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retired framer
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If you are just using AC you are more worried about air from the outside . your biggest problem will be holes in the wall, use exterior wall boxes that have a gasket behind your drywall or plywood. .
 

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This may be an odd question - I am planning to insulate my shed/workshop and add air conditioning. It will be used off and on and will at times be unoccupied. I am planning on using fiberglass batts (R-13) for the wall and cover with plywood. Are there any pluses to used unfaced batts and add plastic sheeting or can I just use paper faced batts?

I would get kraft faced and staple them in. It's just a shed. I assume you will be using a window unit? There is no reason to go overboard for a workshop.
 

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Batts with paper are garbage, we don't have them in canada.

In a hot climate, humid climate with no real winters you want the barrier on the exterior side.
 

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This board will run you crazy with people vying to be right. I guess you could have it spray foamed and have a heat pump installed. Maybe just tear it down and rebuild it once or twice. Kraft faced bats are not garbage. They are used successfully all over the place.
 
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