Many of the more expensive & higher quality steel roof shingle types, like Decra, are hot dipped in galvalume, a mixture of Zinc & Aluminum, then special long life paint.
Decra has stone chips imbeded in the paint & has a 50 year roof warranty.
I have found 1 company that sells Aluminum shingle type, never seen one in person.
I found a great deal on Craig's List on Decra Shake dark green, $85 / square. I bought 25 squares & as my next house has not been built yet, I am planning roof size/pitch to have as little waste as possible. It is to be installed on 2x2 wood battens with horizontal screws, none face up.
Some breathing above roof wood decking & eave to ridge venting below.
Last edited by buffalobillpatrick; 01-07-15 at 02:42 PM..
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