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

https://www.phone-bookmarks.win/single-ply-roof-guarantees-usually-15-20-years-cover-product-defects-but

Single ply roof guarantees usually cover 15-20 years, reflecting the manufacturer's confidence in the materials but not the full lifespan. In reality, these roofs can last 25-40 years if properly cared for