Which agency is responsible for determining the fire rating of asphalt shingles?

The agency responsible for determining the fire rating of asphalt shingles is Underwriters Laboratories, commonly referred to as UL. This organization is known for its rigorous testing and certification standards, especially in the realm of safety and performance for various building materials. By evaluating products like asphalt shingles, UL conducts tests to assess their resistance to fire, ensuring that they meet specific safety criteria.

The fire rating assigned by UL provides crucial information to manufacturers, contractors, and consumers about how well a material can withstand exposure to fire. This is particularly significant in construction and building codes, where fire safety is a paramount concern. Using UL's ratings helps ensure that roofing products can effectively protect structures and occupants from potential fire hazards.