Minimum Insulation R-value Requirements

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STATEAPPLICABLE CODEASHRAE ZONEMINIMUM R-VALUESTATE & LOCALALAlabama2015 Alabama Commercial Energy Code2R-253R-25STATE & LOCALAKAlaska2012 Alaska Building Energy Efficiency Standard7R-358R-359R-40LO C A L O N LYAZArizonaNo statewide mandated R values Phoenix - 2012 IECCYuma - 2009 IECC Tucson - 2012 IECCFlagstaff - 2009 IECC2R-202R-202R-205R-20S TAT E O N LYAR ArkansasArkansas Enery Code for New Building Construction3R-204R-20S TAT E O N LYCACalifornia2016 Building Energy Efficiency Standards2R-253R-254R-305R-306R-30STATE & LOCALCOColorado2012 IECC4R-255R-256R-307R-35S TAT E O N LYCTConnecticut2016 Connecticut State Building Code5R-25STATE & LOCALDEDelawareASHRAE 20104R-20S TAT E O N LYDCDistrict of Columbia2012 IECC4R-25S TAT E O N LYFLFlorida2014 Florida Building Code, Energy Conservation1R-202R-20S TAT E O N LYGAGeorgia2011 Georgia State Minimum Standard Energy Code 2R-203R-204R-20S TAT E O N LYHIHawaii2015 IECC1R-20STATE & LOCALIDIdaho2012 IECC5R-256R-30STATE & LOCALILIllinois2015 IECC4R-305R-30S TAT E O N LYINIndiana2010 Indiana Energy Conservation Code4R-205R-20STATE & LOCALIAIowaIowa State Energy Code5R-256R-30STATE & LOCALKSKansas2006 IECC4R-155R-20S TAT E O N LYKYKentucky2013 Kentucky Building Codes4R-25STATE & LOCALLALouisiana2009 IECC2R-203R-20S TAT E O N LYMEMaine2006 IECC6R-207R-25S TAT E O N LYMDMarylandMaryland Building Performance Standards4R-305R-30S TAT E O

TX Texas 2015 IECC 2 R-25 3 R-25 4 R-30 STATE ONLY UT Utah 2015 IECC 3 R-25 5 R-30 6 R-30 STATE ONLY VT Vermont 2015 Vermont Commercial Building Energy Standard 6 R-30 STATE ONLY VA Virginia 2014 Virginia Building Code 4 R-25 STATE ONLY WA Washington 2015 Washington State Energy Code 4 R-30 5 R-30 6 R-30 STATE ONLY WV West Virginia …

  2015, Auth, Ccie, Utah 2015 iecc, 2015 iecc