Roofing Shingle Classes

Withstand a burning brand measuring 1 5 x 1 5 and weighing 1 4 gram.

Roofing shingle classes.

The class 4 shingle. Roofing with a class c rating is able to. Experience maximum flame spread of 13 feet. What are roof shingles.

Class c roofing provides only light fire protection. Ul 790 and astm e 108. 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. This scrim reinforcement helps the shingle withstand the impact of hail.

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. Due to the materials used in their construction most asphalt shingle roof assemblies have a class a fire resistance rating. There are three levels of fire resistance. With class 4 shingles there are no splits or tears.

I ll share on several test that can be performed in this category for the highest performing impact resistant shingles on the market today. Pressure treated shakes and shingles are the most common roofing materials to fall under the class b rating. 2218 steel ball listing. 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.

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. Currently the highest class of asphalt shingles is the class 4 shingle which will carry at least the u l. Cool roof shingles california title 24.