Corrugated Iron

Corrugated roofing is one of the most iconic building materials in Australian construction history. The corrugation pattern — technically a sinusoidal wave — gives the thin sheet metal significant structural strength and rigidity, allowing it to span between purlins without additional support. Traditional corrugated iron was galvanised (zinc-coated) mild steel, but modern corrugated roofing is almost exclusively produced using Colorbond or Zincalume steel from BlueScope. The standard corrugated profile in Australia is known as "custom orb" or simply "corrugated." It has a pitch of 76mm between crests and a depth of 16mm. This profile is fixed with roof screws through the crest of the corrugation, with neoprene washers to ensure a waterproof seal. Corrugated roofing is suitable for roof pitches as low as 5 degrees, though steeper pitches provide better water shedding and a longer lifespan. In Gippsland, corrugated roofing is found on everything from heritage farmhouses and woolsheds to modern residential homes. Many older galvanised corrugated iron roofs are still in service but may be showing signs of rust, particularly in the valleys and around fastener points. Town & Country Roofing frequently replaces ageing corrugated iron with new Colorbond corrugated sheeting, retaining the classic profile while providing modern corrosion protection.