R - Value
The Thermal Conductivity (k value) of new IsoBoard is 0.026W/m°C. The Thermal Resistance (r value) of IsoBoard is calculated by dividing the thickness of the IsoBoard by the Thermal Conductivity (k-value)as per the table below.
For SANS10400XA R-value calculations, use the k-value of IsoBoard of 0.026 W/m°K .
Thermal Conductivity tested to SANS 8301
ISOBOARD THERMAL CONDUCTIVITY K VALUE
0.02624 W/M.K - TEST RESULT AVAILABLE
Thickness (mm)
30
40
50
60
70
80
90
100
R-Value
Thermal Resistance (m.°K/W)
1,143
1,524
1,905
2,287
2,668
3,049
3,429
3,811
U-Value
Thermal Transmittance (W/m2°K)
0,875
0,656
0,525
0,437
0,375
0,328
0,292
0,262
Use these values for SANS 10400XA R-value calculations
