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Understanding Class 4 Impact-Resistant Shingles

A homeowner guide from Summit Line Roofing Co.

Class 4 is the highest UL 2218 rating, meaning a shingle survived a two-inch steel ball dropped from 20 feet without cracking.

Many Colorado insurers offer premium discounts for Class 4 roofs.

They cost somewhat more upfront but often pay back through fewer claims and lower premiums.

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