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2025 California WUI Code Class A tested roof-assembly path

The 2025 California Wildland-Urban Interface Code specifies a Class A roof assembly tested to ASTM E108 or UL 790.

This record covers the tested-assembly path. The code also names limited assemblies treated as equivalent without testing. A covering name alone does not document the deck and underlayment used in a tested assembly.

code · California mapped fire hazard areas · Last verified 2026-08-24 · JSON (CC BY 4.0)

Published requirement text

“a Class A fire classification when tested in accordance with ASTM E108 or UL 790”

2025 California Wildland-Urban Interface Code, Section 504.2 — California Building Standards Commission / Town of Truckee public record

Where this instrument is documented

Instrument cwuic-2025.

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

Place	Force	Reach	Dated	Checks open	Source
California	active application documented	mapped area	effective 2026-01-01	3	Building in the Wildland

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	eq	roof-assembly
fireRating	eq	class-a
testStandard	in	astm-e108–ul-790

Products with documented matching attributes

Open the Build rules that quote this requirement

Product	Category	Status	Documented match evidence
Elastoflex SA P FR, Polyflex SA P FR, Elastobase V, Elastoflex SA V FR	roofing	Listed	3 cited fields Assembly role: roof assembly · Listing 8180-2305:0505, Design field Fire rating: class a · Listing 8180-2305:0505, Design field Test standard: ul 790 · Listing 8180-2305:0505, Approval field
Owens Corning Titanium FR 0.032-inch aluminum-panel roof assembly	roofing	Attribute match	3 cited fields Assembly role: roof assembly Fire rating: class a Test standard: astm e108
Owens Corning Titanium FR 26-gauge steel-panel roof assembly	roofing	Attribute match	3 cited fields Assembly role: roof assembly Fire rating: class a Test standard: astm e108
Owens Corning Titanium FR asphalt-shingle roof assembly	roofing	Attribute match	3 cited fields Assembly role: roof assembly Fire rating: class a Test standard: astm e108
Owens Corning Titanium FR concrete-or-clay-tile roof assembly	roofing	Attribute match	3 cited fields Assembly role: roof assembly Fire rating: class a Test standard: astm e108

Sources

2025 California Wildland-Urban Interface Code, Section 504.2 — California Building Standards Commission / Town of Truckee public record (official). Accessed 2026-08-24.

2025 California WUI Code Class A tested roof-assembly path. FireApproved. https://fireapproved.com/requirements/cwuic-2025-class-a-roof-test-path/. Last verified 2026-08-24.