Roofing Shingle Classes

Roof shingles consist of a series of individual overlapping components that when laid together in rows or courses starting at the bottom edge of a roof form a barrier designed to repel water snow and ice.

Roofing shingle classes.

Experience maximum flame spread of 13 feet. Fire resistance is based on two test standards. This scrim reinforcement helps the shingle withstand the impact of hail. The class 4 shingle.

Roofing with a class c rating is able to. 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. What are roof shingles. Withstand a burning brand measuring 1 5 x 1 5 and weighing 1 4 gram.

With a regular shingle most of our competitors impact resistant shingles are only class 3 cracks and ruptures will appear from that kind of impact. Ul 790 and astm e 108. 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.

There are three levels of fire resistance. 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. Class a is the highest level. Class c roofing provides only light fire protection.

Due to the materials used in their construction most asphalt shingle roof assemblies have a class a fire resistance rating. Currently the highest class of asphalt shingles is the class 4 shingle which will carry at least the u l. With class 4 shingles there are no splits or tears.