Older panels will fade over time. I don't know of anything other than repainting them.
Coverage width for the panel is 36" when you are side-lapping multiple panels on a roof or wall. Classic Rib Panel, by itself, is about 38" wide.
The Charcoal color is only on the top side of the panel. The underside has a white wash-coat paint applied to protect the substrate. This is typical for all panels and colors.
You can end-lap panels to make the length or you can order the length you need cut down to the inch from you local Home Depot store ProDesk. So if you need 24'-2" you can order them in that length for instance.
i dont see why you cant. it is heavy enough.
When you are side-lapping multiple panels on a roof or wall the coverage width for the panel is 36". 1 Classic Rib Panel, by itself, is about 38" wide.
Yes, you can order them from the ProDesk at your local Home Depot store. When ordering through the ProDesk you can also order custom sizes cut down to the nearest inch.
It's hard to answer this question without knowing the building dimensions. The Classic Rib panel has a 3' coverage after lapping. Whatever the length of the building is in feet divided by 3 will give you the number of panels needed at the length eave to highside. For example 57' divided by 3 = 19 panels at 14'.
Classic Rib panel has a coverage of 3'. 80' divided by 3' = 26.66. You'll need 27 panels at 14' long. Make sure the panels are installed over a solid substrate or wood framing with a slope so that water runs off the roof.