Standing-Seam Metal RoofPros: Extremely durable, long lasting, light reflective and fully recyclable, metal roofs are a great investment for anyone â not just green homeowners. You can ramp up the green factor by choosing a metal roof made with recycled content and in a lighter color.Cons: More expensive than asphalt shingles (though less than copper and slate), a standing-seam metal roof is a bigger investment up front. Also, homeowners in areas with heavy snowfall must include a plan for dealing with snow â it slides right off metal roofs, potentially creating huge drifts around the perimeter of the house.The Advantages of a Metal Roof