Roxul ComfortBoard IS User Manual
Page 22
ROXUL
®
The Better Insulation™
20
Table 2: R-value Recommendations by Climate Zone for each enclosure element
Climate
Zone
Wall
Vented
Attic
Compact
Roof
Basement
Wall
Exposed
floor
Slab
edge
1
Windows
(U/SHGC)
Sub-slab
2
1
10
40
35
5
10
none
yes
none
2
15
50
40
10
20
5
0.35/<0.25
none
3
20
50
45
10
20
7.5
0.30/<0.3
5
4
25
60
45
15
30
7.5
0.30/<0.35
7.5
5
30
65
50
15
30
10
0.24/<0.50
7.5
6
35
75
60
20
40
10
0.18/--
10
7
40
90
65
25
45
15
0.15/--
15
8
50
100
75
35
50
20
0.15/--
20
Table 3: ROXUL COMFORTBOARD IS Thickness to Reach Recommended R-value for Various Wall Assemblies
Nominal
R-value
Wall Assemblies with ROXUL® COMFORTBOARD™ IS Thickness
2x6 wood frame with R-
22 COMFORTBATT
2x4 wood frame with
R14 COMFORTBATT
Load bearing clay
masonry or CMU
10
-
-
3”
15
-
1”
4”
(2+2)
20
-
1.5”
5”
(2+3)
25
1”
3”
7”
(3+4)*
30
2”
4”
(2+2)
8”
(4+4)*
35
4”
(2+2)
6”
(3+3)
9”
(6+3)*
40
5”
(2+3)
7”
(4+3)*
10”
(6+4)*
50
7”
(4+3)*
9”
(6+3)*
12”
(6+6)*
* Values in parentheses give the thicknesses of each layer of insulating sheathing required to make up the
total thickness. For example, (6+6) would be two layers of 6” thick insulating sheathing to make a total of
12”. Standard available thicknesses may vary – please consul
tact sales for
details.
CMU = Concrete Masonry Unit