Energy · IECC 2021 §R402.2.9 / Table R402.1.3
Slab Edge Insulation Placement
Slab-on-grade edge insulation: the less-than-12-inch-below-grade trigger, the 2 ft and 4 ft depths by zone, the heated slab R-5 under-slab rule and the termite exception.. Referenced to IECC 2021 §R402.2.9 / Table R402.1.3.
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