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.

Effects of aging on a class 4 roof. Class four is an impact standard used to rate roofing materials like shingles and metal materials. 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. 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. Roof coverings that have passed the ul standard 2218 test are classified by ul as either class 1 2 3 or 4. As asphalt ages it becomes less pliable and more brittle. When it comes to shingles class 4 shingles are the highest classification you can get when it comes to hail damage resistance.

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. 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. Ul developed a test to rate the strength of roofing materials called the ul. Approved laboratory roof class location.

Storms that bring hail airborne debris and high winds put your roof at risk for damage and installing impact resistant shingles may. 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. Class 4 impact resistant roofing shingles. Fm and be rated as a class 1 2 3 or 4.

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