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Attic Insulation Calculator

Attic insulation is a key component of reducing your home's heating and cooling costs.* The attic insulation calculator will help you figure out how much Owens Corning™ insulation you'll need to insulate your attic – and about how much you'll save in energy costs.*

Product availability may vary depending on your location. For the most accurate availability information, choose a store near you.



Determine your R-value by entering your zip code above.

U.S. Map of Insulation Zones

Zone Attic 2x4 Walls 2x6 Walls Floors Crawlspaces
7 R49 to R60 R13 to R15 R19 to R21 R25 to R30 R25 to R30
6 R49 to R60 R13 to R15 R19 to R21 R25 to R30 R25 to R30
5 R38 to R60 R13 to R15 R19 to R21 R25 to R30 R25 to R30
4 R38 to R60 R13 to R15 R19 to R21 R25 to R30 R25 to R30
3 R30 to R60 R13 to R15 R19 to R21 R25 R19 to R25
2 R30 to R49 R13 to R15 R19 to R21 R13 R13 to R19
1 R30 to R49 R13 to R15 R19 to R21 R13 R13