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Search the building code.

Every 2024 IRC section and the IBC as it loads, by number or topic, plus the local rules for your city. Free to search.

Detached houses, duplexes and townhouses up to 3 stories with their own exits use the IRC; every other building uses the IBC (IBC 101.2).

A random sample from 235 sections for San Antonio, TX, the 2024 IRC

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  • N1103.4.1

    Protection of Piping Insulation

    • Outdoor pipe insulation is protected from sun, moisture, contact and wind, removable 6 ft from equipment, and not wrapped in tape.

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

  • N1102.1.4

    R-value computation

    • Cavity and continuous insulation are checked separately: sum the layers of each, use settled R-value for blown fill, ignore other materials and air films, and take R-0.6 off insulated siding.

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

  • N1103.5.1.1

    Circulation Systems

    • Recirculation uses a pump (no gravity or thermosyphon) that shuts off when the loop is hot or there's no demand; a cold-line return needs a sensor within 2 ft and limits water into it to 104 F.

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

  • N1101.5

    Information on Construction Documents

    • Energy details on the plans: compliance path, insulation R-values, window U and SHGC with area-weighted calcs, mechanical design criteria, equipment sizes and efficiencies, controls, duct and pipe insulation and sealing, and air sealing.

    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.

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