Modified bitumen roofing is a durable, multi-layer system often used on low-slope roofs, combining asphalt with modifiers like rubber or plastic to improve flexibility and strength. Warranty options for modified bitumen roofs vary widely depending on the manufacturer and installer. Basic warranties may cover materials only, often lasting 10 years, while more comprehensive warranties protect against installation defects and offer coverage for 20 years or more. The longevity and quality of your warranty will depend on factors like workmanship, the specific product chosen, and proper installation techniques, as improper installation can lead to bubbling, cracking, or premature wear. It's important to inspect your roof periodically for signs of damage or deterioration, such as blisters, splits, or loose seams, as early detection can prevent small issues from becoming costly repairs.
When considering a warranty, a safe DIY check involves carefully looking at the roof surface, gutters, and attic for water stains or leaks after heavy rain without climbing onto the roof yourself. If you notice signs of wear or suspect problems, it’s time to call a professional roofer experienced with modified bitumen systems. When speaking to a contractor, ask specifically if the warranty is a manufacturer-backed warranty or a workmanship warranty, and whether any maintenance or inspections are required to keep the warranty valid. Also inquire about the steps they take to ensure proper installation and compatibility with local building codes. Knowing the limitations and requirements of your warranty helps protect your investment and keeps your roof performing well for years to come.