Single-ply roof guarantees typically cover 15-20 years, but a roof’s real...

https://archervezi838.lowescouponn.com/do-i-really-need-wind-uplift-calculations-for-a-membrane-roof

Single-ply roof guarantees typically cover 15-20 years, but a roof’s real service life can stretch to 25-40 years with proper care. The guarantee mainly covers materials and workmanship, not wear and tear or maintenance issues