R904 Materials — 2025 California Residential Code
California Residential Code (Title 24, Part 2.5) · 2025 edition · updated 2026-09-26 · California
CBSC: official editions, supplements and errata
Italicized text is a California amendment to the model code, as printed in the official publication.
Cite as: 2025 California Residential Code (Title 24, Part 2.5) § R904 · Effective January 1, 2026 · Official source: Building Standards Commission
R904.1 Scope.¶
The requirements set forth in this section shall apply to the application of roof covering materials specified herein. Roof assemblies shall be applied in accordance with this chapter and the manufacturer’s installation instructions. Installation of roof assemblies shall comply with the applicable provisions of Section R905.
R904.2 Compatibility of materials.¶
Roof assemblies shall be of materials that are compatible with each other and with the building or structure to which the materials are applied.
R904.3 Material specifications and physical characteristics.¶
Roof covering materials shall conform to the applicable standards listed in this chapter.
R904.4 Product identification.¶
Roof covering materials shall be delivered in packages bearing the manufacturer’s identifying marks and approved testing agency labels required. Bulk shipments of materials shall be accompanied by the same information issued in the form of a certificate or on a bill of lading by the manufacturer.
Get a plain-English answer with a citation back to this text.
Ask AI about this code