What Class 4 actually means
UL 2218 Class 4 is a standardized impact test: a 2-inch steel ball dropped from 20 feet, twice per target, with no cracking or rupture. It’s the highest shingle impact rating — achieved through polymer-modified asphalt and reinforced mats.
Translation: hail that destroys standard shingles leaves Class 4 visibly unharmed. In Colton’s hail alleys, that’s the difference between a claim and a non-event.
The cost premium
Class 4 shingles typically add 15–30% to material cost over standard architectural — on a full replacement, roughly low-four-figures of premium for a typical Colton home. Not trivial; not prohibitive.
Installation is identical to standard architectural — no specialty labor premium, no exotic details. Any competent shingle crew installs them; the product does the work.
The insurance credit math
Many CA insurers offer hail/impact premium credits for Class 4 roofs — commonly 10–25% off the wind/hail portion of premiums. On typical Colton premiums, that’s hundreds per year.
Payback: premium cost divided by annual credit often lands at 5–10 years — inside the roof’s life, before counting the avoided deductible and hassle of the next hail claim. Get your insurer’s specific credit amount in writing before deciding; it varies by carrier.
Our recommendation
Hail-prone Colton areas, long-term ownership, and a carrier with a real premium credit: Class 4 is one of the best ROI upgrades in roofing. Short hold or no meaningful premium credit: standard architectural is the rational choice.
We install both and’ll run your specific numbers — premium cost, your carrier’s credit, payback timeline. Call Roof Replacement Experts at (888) 974-0663 for a free estimate with both options.
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