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Colorado CWRC Class 2 noncombustible exterior-wall path

The 2025 Colorado Wildfire Resiliency Code includes approved noncombustible materials as a Class 2 exterior-wall and covering path.

This record covers only product material. Approval, the complete wall assembly, full-height extent, exceptions, mapped class, and the local adopting ordinance remain separate checks.

code · Colorado jurisdictions adopting CWRC in moderate or high mapped wildfire hazard areas · Last verified 2026-08-25 · JSON (CC BY 4.0)

Published requirement text

“Approved noncombustible materials.”

2025 Colorado Wildfire Resiliency Code, Sections 404.3 and 404.3.1 — Colorado Division of Fire Prevention and Control

Where this instrument is documented

Instrument cwrc-2025.

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

Place	Force	Reach	Dated	Checks open	Source
Colorado	published for local adoption; not active statewide	mapped area	not sourced	4	2025 Colorado Wildfire Resiliency 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

2025 Colorado Wildfire Resiliency Code, Sections 404.3 and 404.3.1 — Colorado Division of Fire Prevention and Control (official). Accessed 2026-08-25.

Colorado CWRC Class 2 noncombustible exterior-wall path. FireApproved. https://fireapproved.com/requirements/cwrc-2025-class-2-noncombustible-exterior-wall/. Last verified 2026-08-25.