Impact Resistant Shingles and Class 4 Ratings

Grand Sequoia IR - Dusky Gray from Local Roofer in Denver Planet Roofing

What is an impact resistant shingle? In order to be classified as an impact resistant shingle the shingle must pass the UL2218 Class 4 impact test that was developed in conjunction with the insurance companies.  The test is based on dropping a 2” steel ball from 20’ onto the top of a shingle to see…

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