metal siding, corrugated, used as a roof panel, weathered, galvanized
metal siding, corrugated, rusted
metal siding shingles, pre-weathered galvalume
metal siding shingles, interlocking
pre-weathered galvalume
as seen on Knollwood renovation, by M. Gerwing Architects
roofing, corrugated metal, weathering steel
corrugated steel roofing, weathering steel. Allowed to weather to rust color, in place 6 months or more.