COM 0876.002 2008-2010 - Laserfiche WebLink

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span. A minimum 3 /4 -inch air gap must also be provided between the radiant barrier and the ceiling or insulation below. 2.2 The radiant barrier shall be stretched with the shiny side facing down between the top cords of the truss and stapled or otherwise secured at each side. A minimum air space of 3 /4 -inch above and below is required. 2.3 For attic installations only, the radiant barrier shall be stapled or otherwise secured to the bottom surface of the top cord of the truss and draped below with the shiny side facing down. A minimum air space of 3 /4 -inch above and below is required. 2.4 For open beam ceiling construction only, the radiant barrier shall be laid on top of the roof deck with the shiny side facing up and a minimum 3 /4 -inch air gap between the radiant barrier and the roofing material above. The roof slope must be greater than or equal to 14' from horizontal. 3. At least one (1) square foot of free area for ventilation shall be provided per 150 square feet of attic floor area, or in the case of vaulted or open beam ceilings, per 150 square feet of ceiling area. In vaulted or open beam ceilings, the air space shall be vented with vent area approximately evenly distributed between the top and bottom. In vaulted ceiling, vents shall be provided for each air space between rafters." (16) Amending Table 402.1.1. Table 402. 1.1 is amended by deleting all references to Climate Zones 1 through 8 and replacing with a single climate zone, "Hawai`i County ", amending footnotes "a" and "b ", and deleting footnotes "c" through 'J", to read as follows: "TABLE 402.1.1 INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENT' Climate Zone Hawaii County Fenestration U- Factor b 1.20 Skylight U- Factor 0.75 Glazed Fenestration SHGC 0.30 Ceiling R -Value See Section 402.1.1.1 Wood Frame Wall R -Value 13 Mass Wall R -Value 3 Floor R -Value NR Basement Wall R -Value NR Slab R -Value & Depth NR Crawl Space Wall R -Value NR 7