Class 4 Impact Resistant Roof

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.

Class 4 impact resistant roof.

Approved laboratory roof class location. As asphalt ages it becomes less pliable and more brittle. Class 4 impact resistant roofing shingles. 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.

Roof coverings that have passed the ul standard 2218 test are classified by ul as either class 1 2 3 or 4. Effects of aging on a class 4 roof. Class four is an impact standard used to rate roofing materials like shingles and metal materials. Older class 4 roof systems can sustain damage from 2 1 2 stones.

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. Storms that bring hail airborne debris and high winds put your roof at risk for damage and installing impact resistant shingles may. 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. 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.

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. 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. 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. Class 4 roof covering is the most impact resistant roof and receives the highest premium discount.

Ul developed a test to rate the strength of roofing materials called the ul.