The integrated polymeric backing material of the WeatherGuard® Technology allows Duration STORM® shingles to meet one of the industry's highest ratings for impact resistance, UL 2218, Class 4. ... These shingles also feature SureNail® Technology for high-performance durability and outstanding gripping power.

How do I know if I have impact resistant shingles?

The impact rating may be marked on the underside of the shingle. If it is class 4 and rated U.L. Standard 2218, it's impact resistant. They should be labeled either by the Underwriter's Laboratories or similar testing lab.

Are all shingles impact resistant?

Shingles that are “impact resistant” are considered a class 4 product, and are designed to withstand high winds and hail damage. ... Shingles with the Class 4 rating have an impact resistance rating of UL 2218. The UL 2218 is the roofing industry standard for testing shingles against hail impact.