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2021 IWUIC Class 1 and 2 noncombustible appendage path

The unamended 2021 IWUIC includes approved noncombustible materials as one path for attached unenclosed accessory structures and projections such as decks.

This record covers a documented noncombustible deck product only. Attachment, structure, walking-surface coating, underfloor enclosure, slope, official class, project scope, and local amendments remain checks.

code · Jurisdictions adopting unamended 2021 IWUIC Chapter 5 · Last verified 2026-08-27 · JSON (CC BY 4.0)

Published requirement text

“Approved noncombustible materials.”

2021 International Wildland-Urban Interface Code, Sections 504.7 and 505.7 — International Code Council

Where this instrument is documented

Instrument iwuic-2021.

Set a location to read how this instrument lands where you are.

Place	Force	Reach	Dated	Checks open	Source
Pennsylvania	active application documented	statewide	effective 2026-01-01	4	34 Pa. Code § 403.21 Uniform Construction Code

Each place page carries that place's boundary, project scope and open official checks in full; this page's JSON twin carries them per application.

Machine-readable constraints

Attribute	Operator	Value
assemblyRole	in	deck-structure–deck-surface
noncombustible	eq	true

Sources

2021 International Wildland-Urban Interface Code, Sections 504.7 and 505.7 — International Code Council (official). Accessed 2026-08-27.

2021 IWUIC Class 1 and 2 noncombustible appendage path. FireApproved. https://fireapproved.com/requirements/iwuic-2021-class-1-2-noncombustible-deck/. Last verified 2026-08-27.