Class 3 vs Class 4 Impact-Resistant Shingles: Which Do You Need in DFW?

For Roanoke homeowners in the DFW hail corridor, the choice between Class 3 and Class 4 impact-resistant shingles comes down to one question: how much insurance savings do you want? Both offer significantly better hail protection than standard shingles. But Class 4 qualifies for nearly double the insurance discount — making the math overwhelmingly favorable for most homeowners.

What the Classes Mean

Class 3: Tested with a 1.75-inch steel ball dropped from 17 feet. The shingle must show no fracture on the back side. Simulates moderate hail impact.

Class 4: Tested with a 2-inch steel ball dropped from 20 feet — a significantly harder test. The gold standard for hail-prone areas. This is what insurance companies look for when calculating premium discounts.

Head-to-Head Comparison

The Insurance Math

On a typical Roanoke home with a $2,800 annual premium:
Class 3 saves $280–$420/year. Over 20 years = $5,600–$8,400 total savings.
Class 4 saves $560–$840/year. Over 20 years = $11,200–$16,800 total savings.

The Class 4 upgrade costs roughly $2,000–$3,000 more than Class 3. That difference is recouped in 3–4 years of premium savings — then it’s pure profit for the remaining 16–17 years of the roof’s life.

Our Recommendation for Roanoke

Class 4 for most Roanoke homeowners. The insurance savings alone justify it. The additional hail protection provides real peace of mind in a corridor that records 54+ hail events per year. Products we install: GAF Timberline HDZ IR and Owens Corning Duration FLEX.

Class 3 makes sense when: Budget is the primary constraint, or you’re in a neighborhood with lower replacement costs where the absolute dollar savings from Class 4 are smaller.