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R- 30 Attic Unfaced Fiberglass Roll Insulation 31.25-sq ft ( 15-in W x 25-ft L ) Individual pack

Owens Corning R- 30 Attic Unfaced Fiberglass Roll Insulation 31.25-sq ft ( 15-in W x 25-ft L ) Individual pack

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How is it R3 per inch yet in 5.5 in wall you can get R19?


Hello, the product referenced in your inquiry (Owens Corning EcoTouch R-19 48.96-sq ft Unfaced Fiberglass Roll Insulation with Sound Barrier) is 6.25" thick and has an R-19 value - which is 3.04 R-value per inch. Thank you for your inquiry!

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