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Is DuPont™ Tyvek® necessary over foam board?

April 26, 2017foam necessary

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Is DuPont™ Tyvek® necessary over foam board?

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DuPont™ Tyvek® adds considerable protection against leaky seams in foam board, similar to the protection provided over wood sheathing. Foam boards alone, even interlocking foam boards, do not adequately stop air leakage due to wall movement from settling and thermal expansion and contraction.