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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 4,296 sections for San Antonio, TX, the 2024 IRC

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  • R408.8

    Under-Floor Vapor Retarder

    • In warm-humid zones 1A, 2A and 3A, floor insulation over a vented crawl space carries a vapor retarder of 1.5 perms or less on its exposed face.

    Local review: San Antonio (Bexar County) is climate zone 2A, so this applies to vented crawl spaces there.

    International Residential Code, 2024 · Chapter 4, FoundationsRead the full text (opens UpCodes in a new tab)

  • M2104.3

    Raised Temperature Polyethylene (PE-RT) Plastic Tubing

    • Low-temperature PE-RT joints follow the compression, metal transition and insert rules, with mechanical joints per the maker.

    International Residential Code, 2024 · Chapter 21, Hydronic PipingRead the full text (opens UpCodes in a new tab)

  • P3003.13.4

    Plastic Pipe or Tubing to Other Piping Material

    • Different plastics join with adapters, except one ASTM D3138 solvent joint between ABS and PVC at the drain-to-sewer transition; plastic to cast iron hub is caulked or compression.

    International Residential Code, 2024 · Chapter 30, Sanitary DrainageRead the full text (opens UpCodes in a new tab)

  • R1003.12

    Clay Flue Lining (Installation)

    • Clay liners per ASTM C1283 run from 8 in below the lowest inlet (or the top of the smoke chamber) to above the walls, slope no more than 30 degrees, are laid in refractory mortar with smooth joints, and keep a gap no thicker than the liner.

    International Residential Code, 2024 · Chapter 10, Chimneys and FireplacesRead 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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