Blanket (Batt and Roll) Insulation
Thickness (inches) R-Value
3 1/2 11
3 5/8 13
3 1/2 (high density) 15
6 to 6 1/4 19
5 1/4 (high density) 21
8 to 8 1/2 25
8 (high density) 30
9 1/2 (standard) 30
12 38