CertainTeed
Johns Manville
Knauf
Owens Corning
4 ft
93 in
8 ft
15 in
15 1/4 in
16 in
24 in
R7
R8 (2 1/2 in)
R11 (3 1/2 in)
R13 (3 1/2 in)
R15 (3 1/2 in)
R19 (6 in)
R21 (6 in)
R25 (8 in)
R30 (10 in)
R38 (12 in)
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