SIP R-Values (Calculated R-Values)
|
SIP Panel Thickness |
|
|
|
|
|
|
4 1/2" |
6 1/2" |
8 1/4" |
10 1/4" |
12 1/4" |
|
|
EPS |
14.4 |
21.6 |
27.9 |
35.1 |
45.9 |
|
XPS |
19.5 |
29.5 |
38.3 |
48.3 |
58.3 |
|
Polyurethane |
21.7 |
32.9 |
N/A |
N/A |
N/A |
|
Consult the panel manufacturer to verify R-values. R-values can vary between SIP manufacturers. |
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Calculated R-values for generic structural insulated panel (SIP), including 7/16” oriented strand board (OSB) on each side. Expanded polystyrene (EPS) is Type I per ASTM C578-07. Extruded polystyrene (XPS) is Type IV – Type X per ASTM C578-06. Polyurethane information is derived from the range of products offered by SIPA Member manufacturers. Please consult SIP manufacturers for actual R-value information.
R-values do not include wall coverings (interior or exterior) and/or air film values.
All listed R-values are at mean temperature of 75° F.
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