Is there a system that uses 2″ polyiso for the wall and 3″ for the roof that could be considered energy efficient for zone 6?
Is there a way to construct an energy efficient home for Northern Vermont using 2″ polyiso walls and 3″ in the roof? There are 3/4″ t+g pine boards on the interior, an aluminum vapor barrier, polyiso, stapping and clapboards. How does this work in zone six? Am I missing something?
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