| EPS Core Thickness |
3 5/8" |
5 5/8" |
7 3/8" |
9 3/8" |
12 3/8" |
| R-Value @ 75° F |
15.34 |
23.04 |
29.77 |
40.36 |
49.02 |
| @ 40° F |
16.57 |
26.26 |
32.28 |
43.80 |
53.23 |
| @ 25° F |
17.15 |
27.16 |
33.46 |
45.42 |
55.21 |
Calculated R-Values are for a generic Structural Insulated Panel, and include 2 sheets of 7/16” OSB at .69 per side. Type I, Expanded Polystyrene Foam that meets ASTM C – 578, calculated per ASHRAE published values at 3.85 per inch at 75° F, 4.19 at 40° F and 4.35 at 25°.
Mean temperatures are established for differing regions, and occupancies. Please consult your local jurisdiction for interpretation of Regional or National Model Energy Code Requirements.
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