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Corrugated iron is distinctly Australian. We associate it with "the Queenslander", the shearing shed, the woolshed, the outdoor dunny, and the water tank. It’s in our blood.
But unfortunately our corrugated iron roofs are very susceptible to rust. If you live in a house with a metal roof that’s more than 15 years old, you might find that bits of rust have started to show. It’s one of the biggest enemies of metal roofing.
Rust happens when the metal comes into contact with moisture in the air, causing a chemical reaction. The longer the metal is exposed, the larger the rust will grow.
Most corrugated iron is treated with rust protectant, or galvanised, which is a process of applying a protective zinc coating to steel or iron. But over time and in harsh environments, protecting layers can wear off and rust can start to grow.
If you’re situated in a highly corrosive environment, ie, coastal or heavy industrial, you should try to rinse your roof with potable water on a regular basis, the same way you would with your car. This is particularly important for parts of your roof that are sheltered from rain or sun.
But if you’ve already noticed bits of rust on your roof, what can you do about it?
There are several options for combatting rust on your roof:
If you find you need to replace your metal roof, then Colorbond is one of your best options. It’s tested in harsh conditions all over Australia and has 5 layers of corrosion resistant coating.
Find out more about Colorbond here.
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ROOF CONSULTATION79 Cambridge Street, Coorparoo Brisbane QLD 4151
QBCC Lic. #1147373 Master Builders 64246