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// CODE SNIPPET

C402.2.5 Slabs-on-grade perimeter insulation

Energy Conservation Code 2015 of Utah > 4 [CE] Commercial Energy Efficiency > C402 Building Envelope Requirements > C402.2 Specific building thermal envelope insulation requirements (Prescriptive) > C402.2.5 Slabs-on-grade perimeter insulation
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Where the slab on grade is in contact with the ground, the minimum thermal resistance (R-value) of the insulation around the perimeter of unheated or heated slab-on-grade floors designed in accordance with the R-value method of Section C402.1.3 shall be as specified in Table C402.1.3. The insulation shall be placed on the outside of the foundation or on the inside of the foundation wall. The insulation shall extend downward from the top of the slab for a minimum distance as shown in the table or to the top of the footing, whichever is less, or downward to at least the bottom of the slab and then horizontally to the interior or exterior for the total distance shown in the table. Insulation extending away from the building shall be protected by pavement or by not less than of 10 inches (254 mm) of soil.

Exception: Where the slab-on-grade floor is greater than 24 inches (61 mm) below the finished exterior grade, perimeter insulation is not required.

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Related Code Sections


C402.2.5 [CE] Commercial Energy Efficiency, Slabs-on-grade perimeter insulation
Where the slab on grade is in contact with the ground, the minimum thermal resistance ( R -value) of the insulation around the perimeter of unheated ...
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