Quote Originally Posted by Irving View Post
I would probably focus on the style, rather than the material, because it's all going to be steel. Copper and aluminum are available, but they'll both be riddled with dents right away from hail. Steel gets dented as well, just not as fast, especially if you installed it directly over decking.
Here are some search terms:
Corrugated
Ribbed
Standing seam
Irving is right. Wish I could help you find a product that rusts, if that's what she wants. I built our home with steel columns and electro-painted galvanized steel siding and roofing. It was featured in a building magazine for it's innovative design. No rust, and maintenance (paint) free for 27 years, so far.