Class 3 is the standard impact rating most asphalt shingles ship with. Class 4 is the highest residential rating — tougher granules, modified asphalt, designed to withstand a 2" impact ball drop test. The upgrade costs $0.50-$1.50 per sq ft. The Texas insurance premium discount typically pays it back in 3-7 years.
Class 3 vs Class 4 shingles: Class 4 costs $0.50-$1.50/sq ft more but qualifies for a 10-30% Texas insurance premium discount. Typical payback is 3-7 years. After payback, the discount is pure savings for the rest of the roof’s life.
UL 2218 is the impact rating standard for residential roofing. The classes refer to how the product survives a steel ball drop test simulating hail.
1.75" steel ball dropped from 17.5 ft, no cracking. The default rating most architectural shingles ship with.
2" steel ball dropped from 20 ft, no cracking. The highest residential impact rating available, achieved through modified asphalt and tougher granules.
The test isn’t perfect — real hail comes in irregular shapes, varying densities, with wind component — but it’s the standard the industry agrees on and the standard insurance carriers use to award the impact discount in hail-prone states.
Most Texas carriers offer a Class 4 discount. State Farm, Allstate, Farmers, USAA, Texas Farm Bureau, Liberty Mutual, Travelers, and most others. The discount applies to the wind/hail portion of your premium — typically 50-70% of the total — so the headline 10-30% is on that portion.
The annual savings are real. On a Houston home with $400K dwelling coverage, the Class 4 discount typically saves $200-$600 per year. Higher-value homes save more. Lower deductibles save less.
The payback period. A 2,500 sq ft roof with $2,500 in Class 4 upgrade cost and $400/year in savings pays back in 6.25 years. After year 7, the discount is pure savings until you replace the roof. Over a 20-year roof life, that’s typically $5,000-$8,000 net savings.
It also reduces deductible exposure. Class 4 shingles take less damage in moderate hail, which means smaller claims, which means more events that fall under your wind/hail deductible threshold and don’t generate claim history. Insurance carriers note repeat claim frequency.
Class 4 impact-rated shingles are now widely available across all major manufacturers’ premium lines.
All five are common Houston installations. We install GAF and CertainTeed Class 4 lines most often because warranty paths are strongest and the products are widely stocked locally.
Impact class is the UL 2218 rating — how a shingle holds up to a steel ball dropped from a specified height simulating hail. Class 3 shingles withstand a 1.75" ball at 50+ ft drop. Class 4 shingles withstand a 2" ball at 90 ft drop. Class 4 is the highest residential impact rating available.
Class 4 impact-rated shingles run $0.50-$1.50 per sq ft more than the Class 3 version of the same product line. On a typical 2,500 sq ft Houston roof, that’s roughly $1,250-$3,750 in upgrade cost.
Varies by carrier — typical range is 10-30% off the wind/hail portion of your premium. On a Houston home with $400K dwelling, that’s often $200-$600 per year saved. Over a 20-year roof life, $4,000-$12,000 in savings — usually exceeding the upgrade cost.
State Farm, Allstate, Farmers, USAA, Texas Farm Bureau, and most other major carriers participate. Each has slightly different documentation requirements — typically a manufacturer-issued certificate of impact rating with the install date and roof address.
Reduces it significantly but doesn’t eliminate it. Class 4 shingles hold up to 1-2 inch hail well. Severe hail (2.5"+) still damages Class 4 shingles, just less severely than Class 3. The discount is the more reliable benefit; reduced claim frequency is the supplementary benefit.
The manufacturer issues a Certificate of Class 4 Impact Rating — a one-page document with the product name, install date, and roof address. We provide this at project completion. You forward it to your agent or upload to your carrier portal. Most carriers apply the discount within 30 days.
Free quote with side-by-side Class 3 and Class 4 pricing. Insurance discount documentation included.
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