Laserfiche WebLink
<br /> <br /> <br /> Page 3 of 8 <br /> <br /> 7 and 8 035 0.60 NR 49 _ 21 - .19 30 10 / 13 10.4 ft 10 / 13 <br /> <br /> For SL 1 foot ° 304.8 mm. <br /> a. R-values are minimums. U-factors and SHGC are maximums. R-19 shall be permitted to be <br /> compressed into a 2 x 6 cavity. <br /> b. The fenestration U-factor column excludes skylights. The SHGC column applies to all glazed <br /> fenestration. <br /> c. The first R-value applies to continuous insulation, the second to framing cavity insulation; either <br /> insulation meets the requirement. <br /> d. R-5 shall be added to the required slab edge R-values for heated slabs. <br /> e. There are no SHGC requirements in the Marine zone. <br /> f Or insulation sufficient to fill the framing cavity, R-19 minimum. <br /> g. "13+5" means R-13 cavity insulation plus R-5 insulated sheathing. If structural sheathing covers <br /> 25 percent or less of the exterior, insulating sheathing is not required where structural sheathing is <br /> used. If structural sheathing covers more than 25 percent of exterior, structural sheathing shall be <br /> supplemented with insulated sheathing of at least R-2. <br /> h. The ceiling insulation alternative in Section 402 1 1.1 can be used as an equivalent alternative for <br /> R-30." <br /> <br /> <br /> (6) Amending Section 402.1.1. Section 402. 1.1 is amended by adding Section 402.1.1.1 to read: <br /> <br /> <br /> <br /> 11402.1.1.1 Ceiling insulation alternative. When Table 402. 1.1 requires R-30 for insulation of <br /> ceiling areas, the following alternate methods of insulation and construction are acceptable: <br /> 1. The opaque portions of roof assemblies shall include at least one of the following: <br /> I.I. R-19 insulation between roof or ceiling framing members; <br /> 1.2. Two inches of foam board insulation; <br /> 1.3. A radiant barrier as provided in Subsection 5 and ventilation as provided in Subsection 4• <br /> 1.4. A cool roof as provided in Subsection 6 and a radiant barrier as provided in Subsection <br /> for <br /> 1.5. Roof heat gain factor is less than 0.05 when calculated in accordance with Subsection 8. <br /> 2. For the purpose of this section, the following terms shall be defined as follows: <br /> 2.1. NET FREE VENT AREA. Net free vent area means the total area through which air can <br /> pass in a screen, grille face or register. <br /> 2.2. ROOF AREA. Roof area means attic floor area; or, if there is no attic "roof area" means <br /> the horizontal projection of roof area measured from the outside surface of the exterior walls <br /> 2.3 GROSS AREA OF OPAQUE ROOF SURFACES Gross area of opaque roof surfaces <br /> means the total surface of the roof assembly exposed to outside air or unconditioned spaces <br /> The opaque roof assembly shall exclude skylight surfaces service openings and overhangs <br /> 3. Plans shall indicate insulation type thickness and location; ventilation opening types sizes and <br /> locations: radiant barrier location and roof surface type as appropriate depending on the option <br /> selected from Subsection 1. <br /> 4. For compliance with Subsection 1.3 additional ventilation of the space containing a radiant <br /> barrier shall be provided by at least one of the following: <br /> 4.1. A baffled ridge vent installed in accordance with the manufacturer's instructions in <br /> addition to lower inlet openings to provide a total of no less than one square foot of net free <br />