Why COLORBOND® Steel made by BlueScope? When building with COLORBOND® steel a shed, garage or carport it pays to ensure that you are getting what you’ve paid for and that the materials used are going to live up to the Australian elements, tried and tested quality that will last. BlueScope have been manufacturing COLORBOND® steel since 1966 giving you peace of mind knowing that it is manufactured to Australian Standards. It also offers 5 layers of protection rather than painted on steel. It also is compliant to be able to be used in Bush Fire Zones, simple to maintain and offers up to a 30 year warranty.