i had a pole barn built but no tyvek was installed before the tin was installed, can we install the tyvek inside on the 2 x 4's than install sheetrock on the walls and fill the cavity with blown-in insulation?

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a better solution is to use spray foam for 1 inch and then use blown in insulation to fill the rest. spray foam does very similar things to house wrap and is why it performs better than all other insulation.

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