Presentation Slides - Building Energy Codes

Opaque Assemblies (§5.5.3) – slide 14Opaque Roofs (§5.5.3.1) – slide 15• Roof w/ insulation above deck:“all insulation installed above (outside of) the roofstructure and continuous”2004: R-15 ci, U-0.0632007: R-20 ci, U-0.048• Comments:- insulation R-value is a minimum for all locations, not acceptable to “average”R-values for tapered insulation- assembly U-factors in Appendix A Table A2.2- exception allows reduction for cool roofOpaque Roofs (§5.5.3.1) – slide 16• Metal building roof:“metal, structural, weathering surface, no ventilatedcavity, steel framing members”• Comments:Climate Zone 5Climate Zone 52004: R-19, U-0.0652007: addendum underreview- exception to 5.8.1.2 allows metal building insulation to be compressed betweenroof skin and structure- assembly U-factors in Appendix A Table A2.3- exception allows reduction for cool roof90.1-2004: Envelope Overview 5