Standing seam metal is our favorite roofing material because it has a potential lifespan of over 100 years with minimal maintenance. Asphalt shingles, on the other hand, have a lifespan of only twenty to thirty years before they have to be replaced and the waste landfilled. The cost of a metal roof is thirty percent greater than asphalt on a new roof. For asphalt roof replacement, the cost difference may be very little when removal and landfill costs are factored in. Metal roofing, if it ever were to be torn off, is recyclable.