Fire ratings for roofs are developed by various organizations to measure the fire resistance of roofing materials. Two of these groups, the Underwriters Laboratories (UL) and ASTM, create fire standards to give the general public a better understanding of what they can expect from the performance of their roofs should any type of spark, flame or fire reach their building.
The primary standard of these testing procedures for the UL790/ASTM E 108 standard is based on fires that are generated on a building from an external cause. Class A, B and C are all ratings that categorize a roof as resistant to fire and not expected to ignite from a spark or flame. The highest form of protection is the Class A fire rating. Class B is rated moderate and Class C fire rating is the lightest fire protection.
The most desired fire rating for any roof is Class A and is most often the required standard rating for complying with building ordinances and codes. The ASTM fire standard procedures further evaluate for burning, resistance and combustion of materials. In many cases, building codes and ordinances as well as insurance regulations require the use of Class A fire rated materials in order to pass code and actually be insurable for home and commercial insurance coverage.
Our lightweight roofing materials have received the highest Class A fire rating. Their high quality is evident in the virgin copolymer resins that form the roofing tiles as well as their high test ratings for impact, hail, freezing and wind. See our site to learn more about how our roofing tiles will protect and enhance your building’s rooftop.