Codes & Ratings
What is Fire Rating?
Roofing Glossary · Codes & Ratings
Definition
A classification system (Class A, B, or C) rating a roofing material's resistance to fire spread. Class A is the highest rating and indicates the material withstands severe fire exposure — most asphalt shingles, metal, clay tile, concrete tile, and slate are Class A. Class B is moderate resistance, and Class C is light resistance. Many municipalities, particularly in wildfire-risk areas of the western U.S., require Class A roofing by code.
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