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Testing Roofing Materials: ASTM Fire Resistance Tests

by allysonripple

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Fierce heat, particularly during summer, can possibly set your roofing system and your entire residence ablaze. Quality roof, provided with appropriate maintenance, should be resistant to any type of flames, as it's required by testing agencies and product criteria. If your roofing can't stand the heat, your house may be in risk of burning.

As per ASTM E108 guidelines, there are 3 classes of fire resistance for roofing materials, i.e., Classes A to C. These pertain to the size of the blazing brand, or the wooden frame, placed on the roof deck, and heated in the course of the test. To simulate real fire conditions, the flame is typically blared by a 12-mph wind originating from a wind generator 60 feet off the roof deck. If the flame burns through the roofing assembly, the material doesn't get a rating.

A Class-A kind of roof covering can resist the flare of a burning brand 12 inches long and wide, or an area of 144 square inches. A Class-B rooftop can prevent the fire coming from a brand around 6 inches on both sides, or 36 square inches in area. A Class-C roof can stand firm against a burning brand two inches on either side, or an area of 4 square inches.

Because Class A roofing can stand alone, it is suitable for houses in areas that can become truly hot during summer months. In some instances, Class B roofing assemblies are upgraded to Class A. For example, the majority of wood shakes are classified as Class B roofing, but a fire barrier below the shakes (gypsum or fiberglass) can get you a Class A roofing setup. Akron roofers can also offer other enclosures like roll roofing.

Roofing materials with fire scores mean they can withstand 3 modes of fire: intermittent flame, flame spread, and ignition from burning brands. The key objective of any roof in a fire is to be sure the flare doesn't penetrate the roofing, let alone disperse to other vital places. You can see the classes of different roofing materials printed on the product labels. On the other hand, you can ask Akron roofing contractors to assist you with such a thing.

Log on to the website of the Center for Fire Research and Outreach of the University of California, Berkeley at for more details on fire ratings. Nonetheless, don't hold back to ask Akron roofing contractors for other related concerns.

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