Currently the highest class of asphalt shingles is the class 4 shingle which will carry at least the u l.
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.
2218 steel ball listing.
Roofing with a class c rating is able to.
This scrim reinforcement helps the shingle withstand the impact of hail.
Due to the materials used in their construction most asphalt shingle roof assemblies have a class a fire resistance rating.
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.
Pressure treated shakes and shingles are the most common roofing materials to fall under the class b rating.
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.
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.
Fire resistance is based on two test standards.
Roof shingles are installed in such a fashion that each seam or joint is overlapped by a shingle further up the roof.
Withstand a burning brand measuring 1 5 x 1 5 and weighing 1 4 gram.
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.
Class a is the highest level.
The class 4 shingle.
There are three levels of fire resistance.
Experience maximum flame spread of 13 feet.
Ul 790 and astm e 108.