Storm season in Wisconsin can lead to hail-related roof damage. Large hailstones can cause dents, cracks, and punctures in your commercial roof. Each year, the state experiences 20-30 days with hail that’s 0.75 inches or larger. In 2024, nearly $2 million in hail-related damage was reported in Wisconsin, with $549,000 in property damage.
To ensure the best protection for your commercial roof, you need not only a durable roofing material but also a complete roofing system designed specifically for hail-prone areas. With that in mind, we’ve put together a list of the best hail-resistant commercial roofing materials.
What makes a roof hail-resistant?
When selecting hail-resistant commercial roofing materials, the gold standard is the UL 2218 Class 4 test. Materials are tested by dropping a 2-inch-diameter steel ball from 20 feet onto the same spot on the material twice. If the material shows no evidence of cracks or ruptures on the back surface, it passes the test. Note that Class 4 is the highest durability rating, while lower classes are tested using smaller steel balls.
Another characteristic that plays into a material’s hail-resistance is its ability to sustain cosmetic damage without compromising its functionality. Some materials can be physically damaged without losing their protection.
In addition to the roofing material, it’s also important to pay attention to the rest of the roofing and structural system. FM, an independent product testing and certification company, provides recommendations for roof construction in areas affected by significant hail events. Most of Wisconsin falls within the severe hail hazard area, which indicates either an FM-approved roofing material or poured concrete, concrete pavers, or aggregate-covered roof decks.
Roofing materials are assessed on their ability to withstand fire, wind uplift, hail damage, and foot traffic under FM approval standards 4470 and 4473. FM tests use ice spheres instead of steel balls, which are propelled toward the roofing material using compressed air.
Best hail-resistant commercial roofing materials
When choosing the best hail-resistant commercial roofing material for your building, consider not only its durability but also its long-term value. Many of the more durable roofing systems cost more upfront but provide superior protection with little maintenance over a longer lifespan, making them less expensive over a building’s life.
Here are the best hail-resistant commercial roofing materials:
- Metal – Metal roofing is manufactured out of steel or aluminum, usually with a protective coating or powder coating for color. Metal is extremely durable, with an expected lifespan of 50 years or more, and is often rated Class 3 or 4 under UL standards. When struck by hail, it may dent but doesn’t cause leaks. Many roofing manufacturers offer approved metal roofing products. Look for thicker metal sheets to help prevent dents, or choose corrugated metal to reduce the visibility of dents or dings.
- EPDM rubber – Rubber roofing materials are able to absorb the impact caused by hailstones, reducing the chance of damage. EPDM rubber is also low-maintenance and can improve energy efficiency when light colors are used.
- TPO or PVC – Due to their flexibility, both TPO and PVC membrane roofs provide great protection from hail impacts. Their reflectivity also reduces the heat island effect and helps you save money on heating and cooling costs.
Whether you’re looking to install a commercial roof on a new building or reroof your existing one, the team at New Roofs can help you select the best hail-resistant roofing system for your budget and building use. Contact our team to get started or get a quick quote to see your budget options.