How long do pontoon boats last?

A well-maintained pontoon boat can last 20-30 years. The aluminum tubes (logs) are extremely durable and rarely the failure point. What ages first is the flooring, upholstery, engine, and electrical systems. In Lake Havasu's dry climate (no saltwater corrosion, minimal hull growth), pontoons kept under cover hold up exceptionally well. Annual flushing, engine service, and UV protection are the keys to longevity.