It is getting easier to find fire-performance information for exterior-use materials, although it helps to know what test information to look for. Standard tests are available to determine if a material qualifies as being "noncombustible" or "ignition-resistant." "Flame-spread" data are also readily available (Class A is best, followed by Class B and Class C). An ignition-resistant material is only defined in the California Building Code, so it won't have a specific meaning outside that state. Fire-performance information can be found in ICC Evaluation Services reports, Underwriters Laboratories Online Certifications Directory, and in the California Office of the State Fire Marshal Wildland-Urban Interface Product Handbook. Product manufacturers will also have fire-performance information available, usually online in their specification or technical information bulletins. Industry trade groups will also provide information generically (for example, a wood association will provide information about certain wood species or siding patterns).

Browse related Faqs by tag: surviving wildfire, beforefire, building:general, flamespread, noncombustible