Three Ages of Tin

Colloquially know as "tin roofs", corrugated iron roofs were once ubiquitous in Australia. Sheets of hot-dipped galvanised iron, cold-rolled to produce the corrugated pattern, the alternating grooves and ridges add weather resistance and increase strength. It usually goes onto the roof in an unpainted state but even after being hot dipped in zinc, after a couple of years it starts to rust. At that stage it's wise to paint it. The traditional colours are red or green: I assume the red was red lead, but I have no idea what the green was - copper maybe?

Anyhow - here are three tin roofs in varying stages of beauty.