Glossary / ignition-resistant

ignition-resistant

A material or assembly that meets a named fire test for ignition, such as an extended ASTM E84 run in Oregon R327. It is not the same as noncombustible.

Last verified 2026-08-23. JSON (CC BY 4.0)

Related

• noncombustible
• r327
• siding
• Ignition-resistant versus noncombustible

Where this term is used

33 guides use this term.

• ASTM E119 versus a WUI wall test
• Bird blocks, boxed soffit, or unvented attic
• Char rate
• Chimney spark arrestors
• Colorado CWRC versus Oregon R327 versus California CWUIC
• Craftsman eaves under R327
• Deck ledger and the wall intersection
• Deck railings in the WUI

All guides →