Sevens in Australia

[Erich]

Corrugated iron, or rather, steel roofs are quite common here in the PNW of North America, though mostly on farm buildings. Always galvanized. Aside from eventually rusting, the failure point is the nails that hold them on. The nails have a rubber grommet to seal them and that usually only lasts a few years. This isn't usually much of a problem as the farm animals don't seem to care if the roofs leak a bit. But the nails rust and then the panels work and sometimes blow off. Standing seam metal roofs are required in areas here which experience wildfires. A bit of a PITA to work on if they are a steep pitch.

Erich in Mukilteo(USA)