"Steve B" fired this volley in
:

Does it have to be galvanized? The Mighty Rib I get from Fabral has 11
layers of coatings,

Mighty Rib IS galvanized, and aluminized, AND primed, AND painted.

The generic term is "Galvalume roofing", and it can be had in all variety
of paints, non-painted, etc.

It lasts a long time. Around here, a 3' wide sheet runs you $2.00 per
linear foot. (cut to length, delivery extra)

LLoyd