Codes & Ratings
What is Impact Rating?
Roofing Glossary · Codes & Ratings
Definition
A UL 2218 classification for roofing materials tested for resistance to simulated hail impact, rated Class 1 (lowest) through Class 4 (highest). Class 4 is the most impact-resistant category and is required or incentivized by insurance companies and local codes in hail-prone areas across Texas, Colorado, Nebraska, Kansas, and neighboring states. Class 4 shingles typically cost 10-25% more than standard shingles but qualify for insurance premium discounts.
Related Roofing Terms
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Impact-Resistant ShinglesAsphalt or composite shingles tested and rated under UL 2218 for resistance to impact from simulated...
→Hail DamagePhysical damage to roofing materials caused by hailstones, ranging from cosmetic bruising (asphalt d...
→Building CodeThe minimum legal standards governing construction methods, materials, and installations in a given ...
→Fire RatingA classification system (Class A, B, or C) rating a roofing material's resistance to fire spread. Cl...
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