1211 41ST ST 2016-01-01 MF Import

/ ' Ta61e R4D2.1.1 Footnotes For 51: 1'foot .= 304.8 mm,ci .= cc �ous insulation, int .= m[ermediate frart ' R-values are minimums. U-factors and SHGC are maximums. WY�en insulation is installed in a cavity which is less than the label or dzsign thickness of the insulation, the compressed R-value of the insulation from Appendix Table A101.4 shall not be less than the R-value specified in the table. °The fenestration U-factor column excludes skylights. The SHGC column applies to all glazed fenestration. IExcep[ion: Skylights may be exciuded from glazed fenestration SHGC requirements in Climate Zones 1 through 3 where the SHGC for such skylights does nct exceed 030. ., ` "10/15/21.+TB" means R-1G continuous insulaiion on the exterior of the ��all, or R-15 oh'the continuous insulation on the interior of the wall, or Z-21 cavity insulation plus a thermal break between the slab and the basement wall at the interior of the basement wall. "10/15/21.+TB" shall be permitted to be met with R-13 cavity insulation on the interior of the basement wall plus R-5 continuous insulation on the interior or exterior of the wall. "10/13" means R-10 continuous insulation on the interior or exterior of the home or R- 13 cavity insulation at the interior of the basement wall. "TB" means thermal break between floor slab and basement wall. ° R-10 continuous insulation is requi-ed under heated slab on grade floors. See R402.2.9.1. � e There are no SHGC requirements in the Marine Zone. � Basement wall insulation is not required in warm-humid locations as defined by Figure R301.1 and Table R301.1. e Resened. ° First value is cavi!y insulation, second is continuous insulation or insulated siding, so "13.+5" means R-13 cavity insulation plus R-5 continuous insulation or insulated siding. If structural sheathing covers 40 percent or less of the exterior, continuous insulation R-value shall be permitted to be reduced by no more than R3 in the locations where structural sheathing is used to maintain a consistent total sheathing thickness. 'The second R-value applies when more than half the insulation is on the interior of the mass wall. ' For singie rafter- or joist-vaulted ceilings, the insulation may be reduced to R-38. k Int. (intermediate framing) denotes standard framing 16 inches on center with headers insulated with a minimum of R-10 insulation. � Log and solid timber walls with a minimum average thickness of 3.5 inches are exempt from ihis insulation requirement. Table R402.1.3 Footnote ' Nonfenestration U-factors shall be obtained from measurement,calwlation or an approved source or as specified in Section R402.1.3. I . .� � � I ` ' . �._/�