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• R909.1

  General

  • Roof coatings follow the fire and material rules and the maker, using acrylic, asphalt, aluminum-asphalt, silicone or urethane coatings meeting their ASTM standards.

  International Residential Code, 2024 · Chapter 9, Roof AssembliesRead the full text (opens UpCodes in a new tab)

• R303

  Foam Plastic

  International Residential Code, 2024 · Chapter 3, Building PlanningRead the full text (opens UpCodes in a new tab)

• R506.3.2

  Base

  • Below-grade slabs sit on a 4 in base of clean sand, gravel or crushed material passing a 2 in sieve, unless the soil is Group I.

  International Residential Code, 2024 · Chapter 5, FloorsRead the full text (opens UpCodes in a new tab)

• R318.7

  Stairways

  • Stair rules apply to all stairs in or serving the house, except site stairs and stairs to unused attics or crawl spaces.

  International Residential Code, 2024 · Chapter 3, Building PlanningRead the full text (opens UpCodes in a new tab)

• R1003.7

  Offsets

  • With a fireclay liner in a single wythe, an offset may not push the upper flue centerline past the middle of the wall below, unless the offset is supported by masonry below; each corbel course still meets R1003.5.

  International Residential Code, 2024 · Chapter 10, Chimneys and FireplacesRead the full text (opens UpCodes in a new tab)

• R603.2.3

  Dimension, Thickness and Material Grade

  International Residential Code, 2024 · Chapter 6, Wall ConstructionRead the full text (opens UpCodes in a new tab)

• R606.1.1

  Professional Registration Not Required

  International Residential Code, 2024 · Chapter 6, Wall ConstructionRead the full text (opens UpCodes in a new tab)

• R505.3

  Floor Construction

  International Residential Code, 2024 · Chapter 5, FloorsRead 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.