Attic Insulation Calculator
Calculate insulation for attic spaces
ft
ft
Formula
Depth = R-Value / 3.2 per inch
Blown-in cellulose insulation provides ~R-3.2 per inch.
Examples
40×30, R-38
11.9" deep, 30 bags.
Frequently Asked Questions
About Attic Insulation
Calculate attic insulation depth and materials needed.