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Vermonter

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Posts:49

10/03/2008 4:10 PM
I'm considering using backer board extensively, for it's impact resistance. I'm concerned with how it might affect the drying ability of wall assemblies. Does anyone know how permeable it is to water vapor?

Vermonter

Registered Users

Posts:49

10/03/2008 4:18 PM
Found some info, but doesn't give much for backerboard. http://www.buildingscience.com/documents/primers/materials/ After checking out Hardie's site, it seems like it is in fact permeable.

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