Roof replacement today for asphalt shingles regardless of what a warranty states will inevitably be within 8 to 12 years. Twenty five and fourty year warranties are meaningless. The amount any home owner can expect to recover if they get into a legal fight over the issue is tiny and hardly worth the time and effort.
Roofing should not be the issue it is today. Cost of roof replacement is something that should be considered once every lifetime. Roof replacement cost is the number one reason for the incredible growth of the asphalt roof replacement industry. Instead of replacing a roof every thirty years now it is every eight or nine years. Paper has replaced asbestos as the foundational ingredient and paper has no staying power.
Metal roofing is today the only logical choice for people who are concerned about the cost of home ownership, the cost of home maintenance and conservation for the sake of the world. Not only does metal roofing solve the problem of fire protection, they also save amazing amounts of energy (money), through their insulation and heat deflection qualities. The make a home warmer in the winter and cooler in the summer.
Replacing a roof with a metal roof is also environmentally wise as it will never fill the landfills as do asphalt shingles. All metal roofs are recyclable regardless of when they come off. With the current paint technology repairs to roofs can also be made with little to draw attention to it.
Metal roofs in the final argument are without a doubt the hands down winner for every category of the discussion. Initial cost is the only negative but can easily be reconciled with a little logic and forethought.