Single ply roof guarantees often cover 15-20 years, but in reality, these roofs...

https://www.cool-bookmarks.win/single-ply-roof-guarantees-typically-cover-15-20-years-but-the-actual-service

Single ply roof guarantees often cover 15-20 years, but in reality, these roofs can last 25-40 years with the right care. Guarantees focus on materials, not wear and tear or poor maintenance, which shortens life