Longevity, Durability, and Recyclability Make Metal Roofing a Good Choice for Sustainable Building
Metal roofs are more expensive than asphalt roofs, but over the life of a metal roof, you would have to replace the same asphalt roof 2-3 times.
According to the Metal Roofing Alliance in Belfair, Wash., a metal roof will last two to three times longer than a traditional asphalt roof. Once apt to corrode, especially in seaside applications, metal roofs now come with specialized finishes and coatings to handle salt spray.
(Via EcoHome Magazine.)