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Note: R-value estimator for insulation only.

   Application Good Better Best
   Attic R-38 R-49 R-60
   Cathedral Ceiling R-30 R-38 R-38
   Wall Cavity R-13 R-15 R-19
   Floor R-19 R-30 R-30
   Basement Wall R-13 R-15 R-19
   Crawl Space Wall R-19 R-19 R-19

*please consult your local building code for the minimum R-value required