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Cedar roofs are made of cedar wood, and like any wood, they are prone to fire. However, there are different considerations for fire resistance, including having a CSSB member Certi-label® products.
In this article, we will learn about the different classes of roofing systems and how they affect fire resistance of cedar roofs.
“Class A roofing systems are intended for use on highly fire-resistant buildings and are required on institutions such as hospitals or jails. Class A roofing systems include cedar roofing products manufactured by CSSB members.” (source: Cedar Shake & Shingle Bureau)
Class B roofing systems are required for use on apartment buildings, condominiums and commercial buildings, and are often recommended for use on dwellings in high fire hazard areas, such as wildland interface urban areas. Class B roofing systems include cedar roofing products manufactured by CSSB members. (source: Cedar Shake & Shingle Bureau)
Class C roofing systems are the most common ones specified for single family dwellings and duplexes when fire retardant roofing is desired. Class C roofing systems include cedar roofing products manufactured by CSSB members. (source: Cedar Shake & Shingle Bureau)
The drawings below show the burning brands made of wood constructed to exacting specifications. (source: Cedar Shake & Shingle Bureau)
How is the treatment tested?
CSSB member pressure impregnated fire retardant treated cedar shakes and shingles provide fire protection locked into the roofing material, proven over and over in eight rigorous Underwriters Laboratories (Underwriters Laboratories, Inc. and Underwriters’ Laboratories of Canada) designed tests: (source: Cedar Shake & Shingle Bureau)
We will not get into the specifics of each test in this article in order to keep it short and sweet, but now you have an idea of the types of roofing classes and some of the fire resistance tests that are conducted on roofs, including cedar roofs.
Thank you for reading this article and we sincerely hope it was useful and informative.
Our Cedar Roofs Inc.
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“Cedar Roofing Facts” report by Cedar Shake & Shingle Bureau.
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