What is Class 4?
Roofing education reviewed by the ROOF.CLICK team. Product specifications referenced from manufacturer documentation.
Short answer
Class 4 is the highest impact-resistance rating under UL 2218 — it means a shingle survived a 2-inch steel ball dropped from 20 feet without cracking.
In more detail
Class 4 shingles (like Atlas Pinnacle Impact and StormMaster Shake, and TEK Metal) resist hail damage far better than standard shingles. Some insurers may offer discounts for qualifying impact-resistant roofing; eligibility and savings vary by insurer, policy, and location, so ask your insurance provider. If you're in a hail-prone area, a Class 4 roof can mean fewer hail-damage repairs over time.
Sources & references
- UL 2218 impact-resistance standard
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Atlas Pinnacle Impact
Impact-rated. Most popular upgrade.
Class 4 Impact-Resistant
15-year manufacturer warranty
Explore this roof system →Related Roof Answers
How much more is an impact-resistant roof?
Upgrading to a Class 4 impact-resistant system costs more per square than the value system. In hail-prone areas, some insurers may offer discounts for qualifying impact-resistant roofing, which can help offset the upgrade over time.
Atlas RoofingWhat is the difference between Atlas Pinnacle Pristine and Pinnacle Impact?
Atlas Pinnacle Pristine is ROOF.CLICK's value architectural shingle. Atlas Pinnacle Impact costs more per square and adds a Class 4 impact-resistance rating — the highest available — which may qualify you for an insurance discount. Both include Scotchgard™ algae-resistant granules.
Insurance QuestionsWill my insurance pay for storm damage?
If a storm caused documented damage (hail, wind), your homeowner's insurance may cover replacement minus your deductible. ROOF.CLICK can help document the damage.
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