Metal roofing has a class 4 impact rating, but what does that mean? We used the UL2218 impact resistant test as inspiration for our own test. We dropped 2″ metal balls from 24′ on corrugated metal roofing and standing seam metal roofing in order to see what happens.
Will it protect your roof from hail damage and water intrusion? The results may shock you.
00:00 What is an impact resistant roof?
00:34 UL 2218 impact rating
01:12 Impact drop test on metal roofing panels
02:04 Results of impact resistant test
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Can Hail Damage A Metal Roof? A Guide To Impact Resistant Roofing
https://www.westernstatesmetalroofing.com/blog/hail-damage-impact-resistant-metal-roof
What’s The Impact Resistance Of Products: UL 2218 Class 4 Testing?
UL 2218 Impact resistant is a standardized test and ranking system that’s used on impact resistant roofing panels.
Underwriters Laboratories (UL) is a testing organization that conducts many consumer tests, including the UL 2218. The UL 2218 Standard For Impact Resistance Of Prepared Roof-covering Materials is the test that determines the strength of roofing materials. Depending on how well the material does, it will be given a rating from Class 1 (least impact-resistant) to Class 4 (most impact-resistant).
How Is A Class 4 Rating Determined For Metal Roofing?
During the UL’s test for impact resistance, a 2” diameter steel ball is dropped from approximately two stories onto the roof. In order for metal roofing panels to earn the title of a Class 4 rating, the ball must not tear, crack, split or open the panel’s surface in any way.
Benefits Of An Impact Resistant Metal Roof
Fewer roof repairs
More weathertightness
Possibly save money on homeowner’s insurance
Fewer Roof Repairs
During a hailstorm, if you have a metal roof you have extra protection against denting, tearing, or puncturing from hail. Other roofing materials, such as asphalt shingles, do not perform as well in these conditions and often result in shingles needing to be repaired or replaced after storms.
More Weathertightness
With increased impact resistance, you also have a more weathertight roof. A metal roof is not likely to be punctured by hail, especially when it’s in a thick gauge. This keeps your roof from having water penetrate through that could cause a leak.
Possibly Save Money On Homeowners Insurance
Some insurance companies will offer a reduced rate for having metal roofing because of its impact resistance. Check with your individual insurance company to see if a discount for metal roofing is offered.
When Is A Class 4 Metal Roof The Right Choice?
With over 5000 hailstorms in 2019 alone, there are a wide range of areas across the United States that are prone to roof damage from hail. If you live in an area that is prone to hail or severe weather, having a class 4 metal roof will offer both extra protection for your home and extra peace of mind for you.
When looking for a roof that is most resistant to hail damage, a material with a Class 4 impact rating is best.
Having a roof with a Class 4 rating means a smaller chance of cosmetic or functional damage after a hail storm or any event where debris comes in contact with your roof.
For more information about insurance discounts you can get with a Class 4 Metal Roof, we recommend reading:
https://www.westernstatesmetalroofing.com/blog/metal-roof-insurance-discount
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