Single ply roof guarantees usually cover 15-20 years, but that’s just the...

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

Single ply roof guarantees usually cover 15-20 years, but that’s just the manufacturer’s promise under ideal conditions. In reality, a well-maintained roof can last 25-40 years