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§ 5E-2-1 H AWAI‘I C OUNTY C ODE <br />2 <br />For SI:1 inch = 25.4 mm, 1 pound per square foot = 4.88 kg/m, <br />3 <br />1 pound per cubic foot = 16 kg/m. <br />ci = Continuous insulation, NR = No requirement, LS = Liner system. <br />a. Assembly descriptions can be found in ANSI/ASHRAE/IESNA Appendix A. <br />b. Where using R-value compliance method, a thermal spacer block shall be <br />provided, otherwise use the U-factor compliance method in Table C402.1.4. <br />c. Cool roof is defined as a roof with three-year aged solar reflectance of 0.55 and <br />3-year aged thermal emittance of 0.75 or 3-year aged solar reflectance index of 64. <br />d. R-5.7ci is allowed to be substituted with concrete block walls complying with <br />ASTM C 90, ungrouted or partially grouted at 32 inches or less on center <br />vertically and 48 inches or less on center horizontally, with ungrouted cores filled <br />2 <br />with materials having maximum thermal conductivity of 0.44 Btu-in/h-f °F. See <br />Section C402.2.3.” <br />(13)Subsection C402.2.3 of the International Energy ConservationCode is <br />amended to read as follows: <br />“C402.2.3 Thermal resistance of above-grade walls. The <br />minimum thermal resistance (R-value) of materials installed in the <br />wall cavity between framing members and continuously on the walls <br />shall be as specified in Table C402.1.3, based on framing type and <br />construction materials used in the wall assembly. <br />Exceptions: Continuous insulation for wood, metal framed, and <br />mass walls are not required when at least one of the following <br />conditions is met: <br />1. Walls have a covering w <br />2. Walls have overhangs with a projection factor equal to or <br />greater than 0.3. The projection factor is the horizontal <br />distance from the surface of the wall to the farthest most <br />point of the overhang divided by the vertical distance from <br />the first floor level to the bottom most point of the overhang. <br />3. Concrete, CMU, and similar mass walls are 6 inches or <br />greater in thickness. <br />The R-value of integral insulation installed in concrete masonry units <br />shall not be used in determining compliance with Table C402.1.3. <br />“Mass walls” shall include walls: <br />2 <br />) of wall surface <br />1. Weighing not less than 35 psf (170 kg/m <br />area. <br />2 <br />) of wall surface area <br />2. Weighing not less than 25 psf (120 kg/m <br />where the material weight is not more than 120 pcf (1900 <br />3 <br />). <br />kg/m <br />SUPP. 9 (1-2021) <br /> <br />5E-8 <br /> <br />