Roofing Shingle Classes

There are three levels of fire resistance.

Roofing shingle classes.

Roofing with a class c rating is able to. I ll share on several test that can be performed in this category for the highest performing impact resistant shingles on the market today. Cool roof shingles california title 24. Roof shingles are installed in such a fashion that each seam or joint is overlapped by a shingle further up the roof.

The class 4 shingle. Ul 790 and astm e 108. 2218 steel ball listing. With class 4 shingles there are no splits or tears.

Due to the materials used in their construction most asphalt shingle roof assemblies have a class a fire resistance rating. Withstand a burning brand measuring 1 5 x 1 5 and weighing 1 4 gram. What are roof shingles. Patented weatherguard technology helps duration storm shingles achieve a ul 2218 class 4 rating the highest rating for impact resistance by integrating a polymeric backing material on the shingle.

Class a is the highest level. Fire resistance is based on two test standards. This scrim reinforcement helps the shingle withstand the impact of hail. Class c roofing provides only light fire protection.

Currently the highest class of asphalt shingles is the class 4 shingle which will carry at least the u l. In a class 4 ul 2218 impact resistance test a 2 inch steel ball is dropped from 20 feet to see if the shingles will fracture. Experience maximum flame spread of 13 feet.