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• N1101.10.1

  Building Thermal Envelope Insulation

  • Insulation 12 in or wider carries an R-value mark, or the installer posts a signed certificate listing type, maker and R-value, plus thickness, density and bag count for blown fill and thickness for spray foam.

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• N1102.2.11.2

  Alternative Crawl Space Wall Insulation Configurations

  • Under the performance or ERI paths, crawl wall insulation follows the proposed or rated design.

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• N1111

  Alterations

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• N1109

  Existing Buildings—General

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• N1110

  Additions

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• N1101

  General

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• N1113.1.1

  Unconditioned Space

  • Unconditioned or low-energy space becoming conditioned follows N1109.6.

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• N1108.2.3

  Reduced Energy Use in Service Water-Heating Options

  • Water heating credits need the tabled UEF: gas storage 0.81 or 0.86, gas tankless 0.92 or 0.95, heat pump 2.20 to 3.75, solar SUEF 3.00 (electric backup) or 1.80 (gas).

  International Residential Code, 2024 · Chapter 11, Energy EfficiencyRead the full text (opens UpCodes in a new tab)

Searches all 4,276 IRC 2024 sections, 5,532 IBC 2024 sections and defined terms (Chapters 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33 so far) and each city's local rules as they are added. Section numbers and titles from the International Residential Code and International Building Code, 2024 editions, copyrighted by the International Code Council; the IRC's electrical chapters (34 to 43) follow NFPA 70, the National Electrical Code. Requirements are summarized in our words (IRC Chapters 3 to 43, IBC Chapters 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33); read the full text at the link on each result. Local values come from each city's published documents.