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Opaque Thermal Envelope Insulation Component Minimum <br />Requirements, R-Value Method <br />Roof <br />C402.2.1 <br />Insulation entirely above roof deck <br />R-49 <br />Metal buildin sa <br />R-19 + R-11 LS <br />Attic and other <br />R-49 <br />Walls. Above <br />grade C402.2.2 <br />Massd <br />R-13.36 <br />Metal buildings <br />R-13 + R146 <br />Metal framed <br />R-13 + R-loci <br />Wood framed and other <br />R-13 + R-7.5 ci, or R-20 + R-3.8ci <br />Walls, Below <br />grade C402.2.5 <br />Below -grade wall' <br />R-10ci <br />Floors <br />C402.2.3 <br />Mass <br />R-16.7 <br />Joist/framing <br />R-38 <br />Slab -on -grade floors C402.2.4 <br />Unheated <br />R-20 for 24" below <br />Heated' <br />1k <br />R-15 for 36" below + R-5 full slab <br />For Sl: 1 inch = 25.4 mm, 1 pound per square toot = 4.88 kg/m2, 1 pound per cubic foot = 16 kg/m'. <br />ci = Continuous Insulation, NR = No Requirement, LS = Liner System. <br />a.Where using R-value compliance method, a thermal spacer block shall be provided, <br />b. Where heated slabs are below grade, below -grade walls shall comply with the exterior insulation requirements for heated <br />slabs. <br />c."Mass floors" shall be in accordance with Section C402.2.3. <br />d."Mass walls" shall be in accordance with Section C402.2.2. <br />e.The first value is for perimeter insulation and the second value is for full, under -slab insulation. <br />8. Section C402.1.4 Assembly U factor, Gfactor or F fiactor-based method, <br />is hereby deleted in its entirety. <br />9. Section C402.1.5 Component performance alternative, is hereby deleted <br />in its entirety. <br />10. Table C402.4 Building Envelope Fenestration Maximum U-Factor and <br />SHGC Requirements, is hereby deleted and replaced in its entirety and the <br />following is hereby added in lieu thereof: <br />Table C402.4 <br />Building Envelope Fenestration <br />Vertical Fenestration <br />Maximum U-Factor 0.30 <br />Maximum SHGC 0.33 <br />5 <br />