What is a Class 4 impact rating?
Class 4 is the highest impact resistance rating under UL 2218, indicating a shingle can withstand 2-inch hail without significant damage and qualifies for insurance discounts in Georgia.
The UL 2218 standard classifies shingle resistance to hail impact in four levels, with Class 4 representing the strongest performance tier. A Class 4 rated shingle must survive impacts from 2-inch diameter steel balls dropped from a height of 20 feet without cracking, splitting, or losing surface granules that would expose the underlying material.
For Georgia property owners, this rating carries practical weight. Hail events are common across much of the state, and shingles rated Class 4 demonstrate durability that insurers recognize and reward. Many homeowners and businesses qualify for insurance premium reductions when roof shingles carry the Class 4 designation, sometimes ranging from 10 percent to 30 percent depending on the policy and carrier.
Class 4 shingles typically cost more upfront than Class 1, 2, or 3 alternatives, but Georgia contractors often recommend them in hail-prone counties. The rating appears on product documentation and manufacturer specifications, and it applies to the shingle itself, not to installation quality or roof deck protection. When evaluating roof replacement options, confirming the Class 4 rating ensures a home has maximum hail defense and the documentation needed to file insurance claims for impact damage.