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Ambara thermally modified ayous cladding from Nova USA Wood, Forest Grove, Or., has received an official California State Fire Marshal (CSFM) Building Materials Listing (Listing No. 8140-2377-0003) for use in Wildland-Urban Interface (WUI) applications.
Ambara has been tested and certified to CSFM 12-7A-1 and is compliant with Chapter 7A of the California Building Code for exterior wall siding in designated Fire Hazard Severity Zones.
Ambara’s listing can be verified in the California State Fire Marshal Building Materials Listing database by searching “Ambara” or “Nova USA Wood Products” at calfire.govmotus.org/bmlsearch.
The certification applies to horizontal siding installations in nominal 1x6 and wider dimensions using approved profiles from WWPA Standard Patterns and Redwood Lumber Patterns No. 17.
While the BML listing is specific to California, the underlying CSFM 12-7A-1 test data may support fire-performance evaluations in other jurisdictions. Some states and local authorities reference California Chapter 7A standards or accept comparable testing. Verification with local building officials is recommended.
