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When a sheet metal roof is exposed to either airborne salt or airborne pollution, corrosion can happen if the wrong materials are specified. This resource will guide you through the correct level of protection that NCC Volume Two requires for Australian roof weatherproofing.
The NCC’s detailed specifications relate to metallic coated steel and metallic and organic coated steel. They are based on steel type, location, and exposure to salt water, e.g., whether the building is located near breaking surf or an aggressive industrial area. Get across this important NCC provision, quickly.
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NCC specifications for weatherproofing a sheet metal roof in Australia, based on location.