Storm damage on modified bitumen roofs often shows up as tears, punctures, or blisters in the membrane, typically caused by high winds, hail, or flying debris. This roofing material features a layered structure with asphalt modified by rubber or plastic, which gives it flexibility and durability but also means that improper repairs can easily void the warranty. When you notice damage, it’s important to first inspect the affected area safely from the ground or from a ladder if you’re comfortable. Look for loose granules, cracks, or areas where the membrane has lifted. Small punctures or rips might be repairable with a patch kit specifically designed for modified bitumen, but avoid using generic roofing cement or sealants not approved by the manufacturer, as these can damage the roofing layers and risk your warranty.
If the damage is more extensive, or if you’re unsure about the repair, it’s best to call a professional roofer experienced with modified bitumen systems. When contacting a contractor, ask if they are familiar with your specific roofing product and its warranty requirements, and inquire about the materials and methods they plan to use for the repair to ensure warranty compliance. You might say, “Can you provide documentation that the repair methods meet my manufacturer’s warranty standards?” and “Do you have experience handling storm damage repairs under warranty conditions?” Doing a prompt and proper repair using recommended materials not only restores your roof's integrity but also keeps warranty protections intact, helping you avoid future costs.