Review | Building |
Review Date | 06/07/2022 |
Status | Rejected |
Comments |
06/07/2022 Under the prescriptive compliance approach, slab edge insulation must be R-10 minimum at the slab perimeter, with an overall length (horizontal and/or vertical) of 2 feet. | Ref. 2018 IRC with Virginia Amendments Table (N1102.1.1). | The slab edge need be insulated only when the slab (or some portion of its perimeter) is within 12" of grade; | (Ref. Section R1102.2.9. | When the slab itself is heated (e.g., via embedded hot water pipes), slab edge insulation must be increased to R15 where it is at or near grade. |
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