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• R316.3

  Story Above Grade Plane

  • A habitable attic counts as a story unless it's no more than a third of the floor below (half if sprinklered), enclosed by the roof and knee walls, and within the walls below.

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

• R905.5.1

  Sheathing Requirements

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

• 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)

• R505.2.5

  Fastening

  • Steel screws are self-drilling ASTM C1513, spaced and edged 1/2 in or more; subfloor takes No. 8 countersunk screws 3/8 in from edges; all screws show three threads.

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

• R802.10.1

  Truss Design Drawings

  International Residential Code, 2024 · Chapter 8, Roof-Ceiling ConstructionRead the full text (opens UpCodes in a new tab)

• R610.5.2

  Bottom (Sole) Plate Connection

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

• R905.5.5

  Application

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

• R905.4.6

  Flashing

  • Metal shingle valleys reach 8 in each side with a 3/4 in rib, lap 4 in, over a 36 in underlayment strip.

  International Residential Code, 2024 · Chapter 9, Roof AssembliesRead 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.