Single ply roof guarantees typically cover 15-20 years, but these roofs can...

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

Single ply roof guarantees typically cover 15-20 years, but these roofs can often last 25-40 years with the right care. Guarantees mainly cover material faults, not wear and tear or maintenance issues