Ul developed a test to rate the strength of roofing materials called the ul.
Ul class 4 impact resistant roof.
Impact resistant shingles and other roofing materials are designed to resist damage from hail and flying debris abuse that might damage ordinary shingles.
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.
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.
Meets class f wind rating from underwriters laboratories the highest wind rating possible dura grip adhesive seals each shingle tightly and reduces the risk of shingle blow off.
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.
Storms that bring hail airborne debris and high winds put your roof at risk for damage and installing impact resistant shingles may.
Shingles on an impact resistant roof are designed to withstand high winds and hail damage and have a class 4 rating see below.
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.
The test consists of simulating the speed and terminal velocity of a 2 hail stone falling from the sky.
To meet class 4 impact criteria the shingle must show no evidence of fractures or cracks on the back side.
I have installed in accordance with the manufacturer s specifications on the above described residence a roof covering listed as complying with underwriters laboratory standard 2218 impact standard for impact resi.
Passes the ul 2218 class 4 impact resistance test and may qualify for insurance discounts.
Roof coverings that have passed the ul standard 2218 test are classified by ul as either class 1 2 3 or 4.
The cost of class 4 impact resistant shingles can vary from company to company but if you take the time to search you will find that many companies offer ul class 4 impact resistant roof options that are reasonably priced.
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.
1 excellent wind performance.
Roof coverings must be tested and approved by underwriters laboratories ul or factory mutual fm and be rated as a class 1 2 3 or 4.
Stance of prepared roof covering materials with an impact resistance classification of.
Class 4 impact resistant roofing shingles.
Class four is an impact standard used to rate roofing materials like shingles and metal materials.
But it is also important to note that the price you pay for a class 4 roof will mean your home or building is well.
Class 4 roof covering is the most impact resistant roof and receives the highest premium discount.
Class 1 class 2 class 3 class 4.
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.
