Is dense-packed cellulose an air barrier?
Numerous sources on the Web say that cellulose installed at 3.6 pounds per cubic foot is an air barrier, but in another Q&A item, Peter Yost said that it's not. Can someone clarify this issue and provide data? Thank you.
Posted Mar 11, 2009 10:54 AM ET
Edited Oct 25, 2010 8:45 AM ET
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