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Can I compress 6″ R-19 batts to fit into a 2″x 4″ cavity, and will it be more effective than 3 1/2″ batts?

April 26, 2017batts cavity compress effective fit r-19

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Can I compress 6″ R-19 batts to fit into a 2″x 4″ cavity, and will it be more effective than 3 1/2″ batts?

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A. While insulation batts are easily compressed, the R-value will be significantly reduced – it is best to use the correct thickness and not compress the insulation. You should also avoid storing heavy materials on top of attic insulation for the same reason.