Roofing Shingle Classes

There are three levels of fire resistance.

Roofing shingle classes.

Cool roof shingles california title 24. Pressure treated shakes and shingles are the most common roofing materials to fall under the class b rating. Withstand a burning brand measuring 1 5 x 1 5 and weighing 1 4 gram. Fire resistance is based on two test standards.

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. What are roof shingles. The class 4 shingle. Class a is the highest level.

Ul 790 and astm e 108. Class c roofing provides only light fire protection. 2218 steel ball listing. 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. 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. 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. Experience maximum flame spread of 13 feet.

Roofing with a class c rating is able to. This scrim reinforcement helps the shingle withstand the impact of hail. I ll share on several test that can be performed in this category for the highest performing impact resistant shingles on the market today.