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California Fire Standards and Exterior Wood Products

California Building Code Chapter 7A requires building construction used in the exterior of buildings within Wildland-Urban Interface (WUI) fire areas to be fire-resistive construction.   Lumber products used as siding, decking or soffits in exteriors must pass state-mandated fire tests. The full standard, which was initiated by the California State Fire Marshal's Office, can be viewed online at: www.fire.ca.gov/fire_prevention/fire_prevention_wildland.php 

A number of lumber product fire tests have been successfully completed to meet the standard. The State Fire Marshal has also granted approval for many lumber products and species, which is shown in the  Wildland-Urban Interface Products Handbook, published by the California Office of the State Fire Marshal.

WWPA has prepared a Tech Note to assist those making and selling lumber products in California that may be used in exterior applications such as siding, decking and soffits. Tech Note 2008-01 lists the products that have successfully passed fire tests or are covered by the generic approval . It also shows required installation methods and specifications. 

Tech Note CA Fire

California Fire Standards and Exterior Wood Products - Rev. 10

4 pages, published 2008, revised October 2009

A review of regulations for building materials used in new construction in California's Wildland Urban Interface (WUI) areas, including siding, decking and soffit products for a listed lumber species that meet the California Building Code Chapter 7A requirements.

Other Resources


Wildland-Urban Interface Products Handbook
California Office of the State Fire Marshal.

Testing Standard CA SFM 12.7A-1 - Exterior Wall Siding and Sheathing
California Referenced Standards Code

Testing Standard CA SFM 12.7A-3 - Under Eaves
California Referenced Standards Code

Testing Standard CA SFM 12.7A-4 - Decking
California Referenced Standards Code