I don't know...

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.... I'm sure if properly applied that.....

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.... today's hot air will still be keeping the cold air at bay for decades like this stuff has.

(Recently uncovered wall portion of a roofless, and largely wall-less coastal 'roadhouse' cabins in western Alaska revealed this 'premium vapor barrier'. wink )


Sometimes, the air you 'let in'matters less than the air you 'let out'.