[jyl]

I'd like to learn about metal roofs for residential uses.

(No need for a new roof anytime soon, just curious.)

Occasionally I'll see a standing-seam metal roof on an industrial building, usually painted brown or green. I know you can also get a standing-seam metal roof in galvanized steel or bare copper. I like the looks, even though it is "different".

How long will these last? Okay in hot weather, cold weather, freezing weather? Interfere with cellphone reception? Are they lightning hazards? Any disadvantages other than initial cost?