Forums > Green Building Technologies > Windows/Doors and Interior/Exterior Finish

Backer Board permeability

Last Post 03 Oct 2008 04:18 PM by Vermonter. 1 Replies.

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Vermonter

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Posts:53

03 Oct 2008 04:10 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

New Member

Posts:53

03 Oct 2008 04:18 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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