Open cell on roof deck in michigan, I’m so confused…
I’m looking for some guidance on insulating my attic. Location is Michigan near Detroit. I am getting quotes on spray foam in my attic. After doing generic research online, I am seeing that open cell on the deck should have a vapor barrier, but every installer around me says it doesn’t need it. I am having trouble with what to believe (I could be reading the wrong articles). My duct work all runs through the attic, so I thought spray foam on the roof deck would be best. Now I’m not sure what to do?
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