NRCA Metal Shingle Practice Questions - NRCA ProCertified Metal Shingle Installer Exam

What impact resistance rating does a metal shingle need to qualify as Class 4 under UL 2218?

Must withstand a 1-inch steel ball dropped from 12 feet without cracking the substrate Must withstand a 2-inch steel ball dropped from 20 feet without cracking the substrate Must withstand a 1.75-inch steel ball dropped from 20 feet without permanent deformation Must withstand a 2-inch steel ball dropped from 20 feet without cracking the coating

Correct Answer:

Must withstand a 2-inch steel ball dropped from 20 feet without cracking the substrate

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