Learned something about copper...
The largest sheet size readily available here in the states is 3' x 8'.
The largest width produced in the world is 4'.
There is one mill in Finland that produces copper sheet in coil roll 4' wide.
I learned this after finding an online source that had a calculator for pricing out custom sizes... The sheet I priced out, was 64" wide.
I got excited when it spat me out a price, but then took a big gulp when I looked at the price.
I then called them to inquire if indeed that size was available and was told about that mill in Finland.
Looks like it's a woody roof for me...