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Old 12-28-2012, 07:56 PM   #11
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Joined: Sep 2007
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Closed-cell spray foam, about 1" should do what you need it to do. It's flammable, so you would want to sheath the walls with drywall or metal.

It acts as a vapor barrier, so if you ever wanted to increase your R-value you can go with regular fiberglass batt right over it.

A vented heater would be a good investment, too.

We used foam in the house we built a couple years ago and have been very happy with the results.
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