What is Class 4 Hail Rating and Why Does it Matter?

When a shingle or other roofing material is listed as having a Class 4 hail rating it means it has the highest impact resistance rating available. This is a classification that is given after the material has undergone rigorous testing as defined by UL, a global safety certification company that conducts performance tests on a wide variety of products, including roofing shingles.

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