Metal roofing is among the most environmentally friendly of roofing options. Here are the top three reasons you can call your new roof a green metal roof: Nearly all aluminum metal roofing is made from 95 % recycled aluminum materials, An aluminum metal roof can be recycled at the end of its life – which is typically 3-5 times as long as that of an asphalt roof, When compared to asphalt, cedar, and slate roof, an aluminum metal roof of any color can save you 25% or more on your cooling costs.