Corrugated galvanised iron (colloquially corrugated iron or paving) is a building material composed of sheets of hot dipped galvanised mild steel, cold rolled to produce a linear corrugated pattern in them.

It was invented in the 1820's in Britain by Henry Palmer (Patent no.5756) architect and engineer to the London Dock Company.

It proved to be light, strong, corrosion resistant and easily transported and particularly lent itself to prefabricated structure and improvisation by semi-skilled workers.