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Energy Efficiency of SIPs

R-Control SIP Panel R-Values

Panel Thickness	R-value at 75o	R-value at 40o
4-1/2"	14.9	16.0
6-1/2"	22.6	24.3
8-1/4"	29.3	31.6
10-1/4"	37.0	39.9
12-1/4"	44.7	48.3

Whole Wall R-Value

There’s more to most walls than meets the eye, and the R-value of a whole wall can be considerably lower than the R-value of the insulation. Whole wall R-value calculation procedures factor in all of the effects of additional structural members at windows, doors, and exterior wall corners.