Single ply roof guarantees typically cover 15-20 years, reflecting the...

https://telegra.ph/If-I-Only-Do-One-Thing-This-Year-What-Roof-Maintenance-Is-Most-Important-07-31

Single ply roof guarantees typically cover 15-20 years, reflecting the manufacturer’s confidence in materials, not the full service life, which can stretch to 25-40 years with proper care