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Kittitas County IR1 noncombustible exterior-wall path

Kittitas County Code 20.10 prints approved noncombustible material as one IR1 exterior-wall path.

This record covers only a product whose noncombustibility is documented. Approval, the complete wall construction, foundation-to-roof extent, official IR class, water and defensible-space inputs, project scope, and County review remain checks.

code · Unincorporated Kittitas County IR1 construction · Last verified 2026-08-27 · JSON (CC BY 4.0)

Published requirement text

“Approved noncombustible materials.”

Kittitas County Code Title 20, Section 504.5 — Kittitas County

Where this instrument is documented

Instrument kcc-14-12-20-10.

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

Place	Force	Reach	Dated	Checks open	Source
Kittitas County	active application documented	unincorporated county	adopted 2021-03-02	7	Kittitas County Code Title 20, Chapter 20.10 Wildland Urban Interface 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
noncombustible	eq	true

Products with documented matching attributes

Open the Build rules that quote this requirement

Product	Category	Status	Documented match evidence
AL13® Plank System	siding	Listed	1 cited field Noncombustible: Yes
Clicklad Closed-Gap aluminum cladding system	siding	Listed	1 cited field Noncombustible: Yes
Hardie® Plank lap siding	siding	Listed	1 cited field Noncombustible: Yes
Hardie® Textured Panel, noncombustible fiber-cement panel siding, 5/16" thick	siding	Listed	1 cited field Noncombustible: Yes · Listing 8140-2026:0502, Description field
JAMES HARDIE BUILDING PRODUCTS, INC. (8140-2026:0001)	siding	Listed	1 cited field Noncombustible: Yes
JAMES HARDIE BUILDING PRODUCTS, INC. (8140-2026:0004)	siding	Listed	1 cited field Noncombustible: Yes
JAMES HARDIE BUILDING PRODUCTS, INC. (8140-2026:0500)	siding	Listed	1 cited field Noncombustible: Yes
Longboard® 6-inch exterior aluminum siding	siding	Listed	1 cited field Noncombustible: Yes
ROCKWOOL Comfortboard 80 exterior continuous insulation	siding	Listed	1 cited field Noncombustible: Yes
Thermafiber RainBarrier High Compressive 80 and 110 exterior insulation	siding	Listed	2 cited fields Noncombustible: Yes Noncombustible: Yes
WoodSyn OptimBoard™ wood-wool cement sheathing	siding	Listed	1 cited field Noncombustible: Yes

Sources

Kittitas County Code Title 20, Section 504.5 — Kittitas County (official). Accessed 2026-08-27.

Kittitas County IR1 noncombustible exterior-wall path. FireApproved. https://fireapproved.com/requirements/kcc-20-10-ir1-noncombustible-exterior-wall/. Last verified 2026-08-27.