Hail Ratings Roof

There are hail resistant roofs.

Hail ratings roof. The exposed fastening system or crimp could be damaged by hail creating a small hole which can cause. A class 4 test involves a steel ball weighing 1 2 pounds being dropped from a height of 12 to 20 feet on the same location of the assembly. Many roofs carry this rating. These products have class 1 through class 4 hail resistance ratings 4 being the highest.

Underwriters laboratories inc ul an independent for profit company has developed a series of laboratory test to measure how well roofing materials resist hail. The second is the tensile strength which defines how malleable or brittle the metal itself may be. Another downgrade to metal roofs against hail is that the profile of them involves crimping. Through research and testing ibhs was able to manufacture hailstones that replicated the properties of hail produced naturally.

The first is the thickness or gauge of the panel. These tests are widely accepted by the roofing industry and the results are widely quoted in industry promotional materials. The ratings are given by taking a steel ball and dropping it from a pre determined height and measuring the damage the roof has sustained. Shingles labeled as impact resistant were purchased and put through a series of in lab tests that simulated the effects of hail impacts.

The american society of testing and materials astm perform the tests. When choosing a roof to stand up against hail storms a few key factors should be accounted for. 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. Fortunately baseball sized hail stones don t happen every day.

The last factor is the method by which the panel bonds to its neighboring panels. The most common type are 3 tab shingles. 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. These single layer shingles are typically rated for winds up to only 60 mph and moderate impact from flying debris or hail.

The material can dent when hit with a heavy object and replacing metal panels is costlier than replacing asphalt wood or tiles although many metal roofing styles are rated to withstand large hail while protecting the home from windblown sparks and cinders in some situations metal roofing can make it more difficult for firefighters from breaking through the roof to pour water on an interior fire. Crimp roofs use a series of metal sheets that re attached from eave to ridge using an exposed fastening system. Ibhs and its members recognized the growing problem of hail damage in large regions of the united states and have devoted years to field and lab research to develop a new test standard for impact resistance. Shingle performance ratings consumers deserve to have confidence that shingles labeled as impact resistant live up to expectations.