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• IBC 1403.1

  General

  • Exterior wall materials follow this section; others need approval.

  International Building Code, 2024 · Chapter 14, Exterior WallsRead the full text (opens UpCodes in a new tab)

• IBC 1403.2

  Water-resistive barrier

  • At least one continuous WRB layer behind the veneer, flashed at openings, run to the top of the wall. Options: No. 15 felt, ASTM E2556 Type I/II, foam sheathing WRB systems, ASTM E331, or approved. Lap horizontal seams 2 in and end joints 6 in.

  Works withIBC 1402.2IBC 1404.4

  International Building Code, 2024 · Chapter 14, Exterior WallsRead the full text (opens UpCodes in a new tab)

• IBC 1403.3

  Wood

  • Wood walls follow Chapter 23.

  Works withIBC Chapter 23

  International Building Code, 2024 · Chapter 14, Exterior WallsRead the full text (opens UpCodes in a new tab)

• IBC 1403.4

  Masonry

  • Masonry walls and veneer follow Chapter 21; veneer backing is concrete, masonry, steel or wood framing; continuous insulation between backing and veneer is allowed.

  Works withIBC Chapter 21

  International Building Code, 2024 · Chapter 14, Exterior WallsRead the full text (opens UpCodes in a new tab)

• IBC 1403.5

  Metal

  • Steel walls per Chapter 22, aluminum per Chapter 20.

  Works withIBC Chapter 22IBC Chapter 20

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• IBC 1403.6

  Concrete

  • Concrete walls follow Chapter 19.

  Works withIBC Chapter 19

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• IBC 1403.7

  Glass-unit masonry

  • Glass-unit masonry follows Chapter 21.

  Works withIBC Chapter 21

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• IBC 1403.8

  Vinyl siding

  • Certified and labeled to ASTM D3679.

  Works withIBC 1404.15

  International Building Code, 2024 · Chapter 14, Exterior WallsRead the full text (opens UpCodes in a new tab)

• IBC 1403.9

  Fiber-cement siding

  • ASTM C1186 Type A (or ISO 8336 Cat. A), labeled.

  Works withIBC 1404.17

  International Building Code, 2024 · Chapter 14, Exterior WallsRead the full text (opens UpCodes in a new tab)

• IBC 1403.10

  Exterior insulation and finish systems

  • EIFS follow 1407.

  Works withIBC 1407.1

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• IBC 1403.11

  Polypropylene siding

  • Certified to ASTM D7254, installed per 1404.18 and the maker's instructions.

  Works withIBC 1404.18

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• IBC 1403.12

  Foam plastic insulation

  • Follows Chapter 26.

  Works withIBC 2603

  International Building Code, 2024 · Chapter 14, Exterior WallsRead the full text (opens UpCodes in a new tab)

• IBC 1403.13

  Fiber-mat reinforced cementitious backer units

  • ASTM C1325.

  Works withIBC 1404.19

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• IBC 1403.14

  Insulated vinyl siding

  • Certified and labeled to ASTM D7793.

  Works withIBC 1404.15

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• IBC 1403.3.1

  Basic hardboard

  • ANSI A135.4.

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• IBC 1403.3.2

  Hardboard siding

  • ANSI A135.6, labeled where structural.

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• IBC 1403.5.1

  Aluminum siding

  • AAMA 1402.

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• IBC 1403.5.2

  Cold-rolled copper

  • ASTM B370.

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• IBC 1403.5.3

  Lead-coated copper

  • ASTM B101.

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• IBC 1403.11.1

  Flame spread index

  • The E84 report must show the specimen stayed in place ahead of the flame.

  International Building Code, 2024 · Chapter 14, Exterior WallsRead the full text (opens UpCodes in a new tab)

• IBC 1403.11.2

  Fire separation distance

  • At least 10 ft to the adjacent building.

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• IBC 2510.6

  Water-resistive barriers

  • Stucco water-resistive barriers per 1403.2 plus 2510.6.1 or 2510.6.2.

  Works withIBC 1403.2IRC R703.7.3IBC 2510.6.1IBC 2510.6.2

  International Building Code, 2024 · Chapter 25, Gypsum Panel Products and PlasterRead the full text (opens UpCodes in a new tab)

• IBC 1407.4.1.1

  Water-resistive barrier

  • Per 1403.2 or ASTM E2570.

  Works withIBC 1403.2

  International Building Code, 2024 · Chapter 14, Exterior WallsRead 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.