Class 4 Impact Resistant Roof

Underwriters laboratories ul is a not for profit independent testing organization that delivers the verified information to help consumers make accurate decisions about products like impact resistant roofing materials.

Class 4 impact resistant roof.

Summarizing the result we would be looking at for a class 3 roof is earned if the sample does not crack when hit twice in the same spot by a 1 75 inch diameter steel ball. As asphalt ages it becomes less pliable and more brittle. Class 4 impact resistant roofing shingles. 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. Effects of aging on a class 4 roof. Older class 4 roof systems can sustain damage from 2 1 2 stones. They are associated with the ul 2218 impact test which involves dropping a two inch steel ball from 20 feet high onto the shingle and examining whether the shingle cracks or not.

As a result it no longer has the ability to transfer impact energy and the mat is damaged and or punctures occur to this system. With class 4 shingles there are no splits or tears. Class 4 roof covering is the most impact resistant roof and receives the highest premium discount. Class four is an impact standard used to rate roofing materials like shingles and metal materials.

Approved laboratory roof class location. After performing the test roofing manufacturers would be scored based on the resistance of the material getting a rating from 1 least hail resistant to 4 most hail resistant. Fm and be rated as a class 1 2 3 or 4. Roof coverings that have passed the ul standard 2218 test are classified by ul as either class 1 2 3 or 4.

If you re one of the millions of american homeowners who live in an area where intense storms frequently occur then your choice of roofing shingles plays a critical role in protecting your roof from storm damage.