20–30+ years with proper maintenance. Many BUR roofs installed in the 1980s are still performing today with periodic coating maintenance.
Yes — if the membrane is intact and insulation is dry, a reflective or elastomeric coating can extend the system by 10–15 years at a fraction of replacement cost.
BUR offers superior redundancy and puncture resistance. For high-traffic roofs or buildings with heavy equipment, BUR is often the better long-term investment.