Posts Tagged ‘Impact resistant shingles’
Impact Resistant Shingles and Class 4 Ratings
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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