Weather All XL 1/2"

Old 12-21-19, 07:56 AM
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Weather All XL 1/2"

Can I use this inside the house under tongue and groove in my ceiling? Do I face foil inside or towards the roof. I am looking for just a little more insulation in my open ceiling. There is already 2" foam and drywall installed. I have 2X2s installed over the drywall and 1" foam and want to put on the Weather All XL and then the tongue and groove. I live where it gets to -38 degrees for extended periods of time. It is not an option to tear it all out and start over. Thank you for any help with my situation.
Old 12-21-19, 11:12 AM
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You can if you want to. Typically foil facing faces the air gap.

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