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American Wood Council

Are OSB and plywood considered wood so the R values can be summed?


Yes, R values can be summed for OSB and plywood. Values are shown in Design for Code Acecptance 7 -  Meeting Residential Energy Requirements with Wood-Frame Construction - 2012 IECC Version. 


The following FAQ is based on the presentation of BCD600 – Meeting Residential Energy Requirements with Wood-Frame Construction.

 
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