Division 7 Ebook Page 526 FOAMULARŪ XPS Insulation ASHRAE 90.1 Prescriptive Wall Insulation Requirements

Technical Bulletin FOAMULAR Extruded Polystyrene (XPS) Insulation ASHRAE 90.1 Prescriptive Wall Insulation Requirements These tables list ASHRAE 90.1 1 (2004, 2007 and 2010 editions) prescriptive insulation requirements for wood framed walls, steel framed walls, and mass (concrete, stone, or CMU) walls, for each of the eight USA climate zones defined in 90.1. The wood and steel framed tables show prescribed stud cavity R-value as the first number, and continuous insulation R as the second number. (Example: 13 + 7.5) The mass wall table shows only the prescribed continuous insulation R-value as there is typically no stud cavity insulation in mass wall construction. ASHRAE 90.1, defines "residential" as multi-family structures greater than three (3) stories in height. "Non- residential" is defined as all occupancies other than residential. ASHRAE 90.1 also provides prescriptive insulation values for "semi-heated" buildings that are not shown in these tables. These tables apply to buildings that are heated and/or cooled as defined in 90.1. Notes 1. ASHRAE Standard 90.1, Energy Standard for Buildings Except Low-Rise Residential Buildings; American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.; 1791 Tullie Circle NE, Atlanta, GA 30329 ASHRAE 90.1 Prescriptive R Requirements for "Wood Framed and Other Walls, Above Grade" JOINTSEALR FOAM JOINT TAPE Zone ASHRAE 90.1-2004 ASHRAE 90.1-2007 & 2010 Non-Resi- dential Residential Non-Resi- dential Residential 1 13 2 13 3 13 4 13 13 + 3.8 5 13 13 + 3.8 13 + 7.5 6 13 13 + 3.8 13 + 7.5 7 13 13 + 7.5 8 13 + 7.5 13 + 15.6 Figure 1 USA Climate Zones (ASHRAE 90.1)

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