Installing metal roofing is like an ancient knight putting on his armor. It might seem like a very thin layer, but it offers a lot of protection and mitigates a lot of damage.
Removing the old asphalt and replacing it with metal takes a huge
structural load off of your house.
Whether made from copper, steel, or aluminum, metal roofing can contain a high percentage of recycled material, making it one of the most environmentally responsible choices. Both copper and aluminum protect themselves by creating a thin patina of oxide (which is responsible for that beautiful turquoise-green of ancient copper), so even if they're scratched they simply repair themselves. Steel can be coated and distressed to resemble any roofing surface—so you get the durability of metal—but the appearance
of more traditional materials.
Add to that the superior insulation value of metal, and you can achieve a 40% reduction of cooling costs in the summer and a 15% reduction of heating costs in the cooler weather. Metal roofing is what you would call a "win-win" scenario.