Homeowners in the DFW metroplex are increasingly opting for impact-resistant roofing materials to combat seasonal hail damage. The industry standard for these materials is the UL 2218 classification, which measures the structural integrity of a shingle against simulated hail impacts.
The Testing Process
During testing, steel balls of varying sizes are dropped from specific heights to strike the same spot on a shingle twice. To earn a Class 4 rating—the highest available—the shingle must show no visible signs of cracking or tearing on the back side of the mat after being struck by a two-inch steel ball.
For Texas residents, installing a Class 4 roof often leads to significant long-term benefits. Beyond the increased durability, most major insurance carriers in the state offer premium discounts for homes protected by these certified materials.
- Class 1: Resists 1.25-inch steel balls
- Class 2: Resists 1.50-inch steel balls
- Class 3: Resists 1.75-inch steel balls
- Class 4: Resists 2.00-inch steel balls
It is important to note that 'impact resistant' does not mean 'hail proof.' While these shingles handle mid-sized hail effectively, extreme storm events can still compromise the granules and asphalt layer, requiring a professional inspection.