Polyurethane roof coating is a popular choice for protecting flat or low-slope roofs because it forms a seamless, waterproof barrier that extends the life of the roof and improves energy efficiency. However, despite its toughness, hail can still cause damage. When hail hits a polyurethane-coated roof, it can cause small dents, cracks, or punctures depending on the size and intensity of the hailstorm. These damages happen because hailstones strike the flexible yet relatively thin coating, sometimes damaging the surface or underlying materials. Over time, if left unchecked, these small punctures or cracks can lead to leaks, water intrusion, and degradation of the roof’s protective qualities. To diagnose hail damage yourself, walk on the roof safely if accessible and look for visible cracks, bubbles, blistering, or areas where the coating seems gouged or broken. Inside the house, watch for new water stains on ceilings or walls after a storm.
If you suspect hail damage but are unsure, it’s wise to schedule a professional roofing inspection. Roofers can do a more thorough examination, including checking moisture levels under the coating and assessing structural impacts. Minor surface damage may be repaired by applying a compatible polyurethane patch or recoating, but larger or deeper damage often requires more extensive work to restore the roof’s integrity. When hiring a contractor, ask if they have experience specifically with polyurethane coatings and hail damage repairs, and whether their work will maintain your existing warranty. You might also ask, “How will you assess the depth and severity of hail damage under the coating?” and “What steps do you take to ensure a seamless, watertight repair without voiding the original roof warranty?” These questions help ensure that repairs will last and keep your home protected.