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Poured concrete is not an air

Poured concrete is not an air barriers. Your wall section will need a separate air barrier.

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Wed, 09/14/2011 - 18:28

Can you point me to where you found that information? According to WBDG.org, 1/2" of unpainted drywall meets the minimum requirements of being an air barrier material (0.004 cfm/sq. ft.), so I find it hard to believe that poured concrete does not meet that requirement given enough thickness. Thanks,

Thu, 09/15/2011 - 14:44

After much researching, I finally found what I was looking for. Cast-in-place and precast concrete is listed as an air barrier material by ASHRAE 90.1-2010 in section 5.4.3.1.3.a.

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