Are metal roofs considered a green building material?

A: Yes, most metal roofing contains some recycled steel content and can be installed directly over an existing asphalt roofing system. This reduces the amount of garbage headed for the landfill. Also, buildings with metal roofs stay cooler in the summer so there is less need to waste energy to run cooling systems. If a metal roof ever needs replacement, the metal panels can be recycled for use in new metal products.