Roxul ComfortBoard IS - Manual (Page 27)

25 ROXUL
® The Better Insulation™
Material Properties
The following tables summarize the relevant material properties for the ROXUL ® COMFORTBOARD™ IS
insulated sheathing product mentioned in this guide.
ROXUL COMFORTBOARD IS Material Properties Table
Thermal Resistance
RSI value 0.72 m
2
K/W per 25.4 mm @ 24
o
C
R-value 4.0 hr
.
ft
2 .
F/Btu per inch @ 75
o
F
Cold Weather
RSI value
0.78 m
2
K/W per 25.4 mm @ -4
o
C
R-value 4.4 hr
.
ft
2 .
F/Btu per inch @ 25
o
F
Hot Weather
RSI value
0.70 m
2
K/W per 25.4 mm @ 37.8
o
C
R-value 4.0 hr
.
ft
2 .
F/Btu per inch @ 100
o
F
Density 128 kg/m 3 (8.0 lb/ft 3 )
Compressive Strength
745 psf (35.5 kPa) resistance at 10% compression
1270 psf (61 kPa) resistance at 20% compression
Vapor Permeance 1768 ng Pa
.
s
.
m
2
(31 perms)
Water Absorption 0.7% by vol
Moisture Sorption 0.05% by weight