We often get asked why we only use Colorbond®steel for our flashings. The answer is simple : in our experience only steel from Colorbond® is able to meet all the criteria that allow us to make high quality skylight flashings.
Colorbond® is more than just spray-painted or powder-coated steel. Every Colorbond® sheet comprises of :
– the actual steel base, which meets Australian Standards
– a special coating patented by BlueScope that actively enhances corrosion resistance
– an additional coating to enhance further layer adhesion
– a primer baked to the surface to inhibit corrosion
– the final baked-in exterior paint layer that helps resist blistering, chipping and flaking
BlueScope’s patented corrosion resistance coating comprises of an aluminium/magnesium/zinc alloy. This alloy is designed to weather at the microscopic level, and in so doing results in the formation of a by-product that then significantly inhibits further corrosion. The external paint layer incorporates Thermatech® which aids in the reflection of solar radiation, even in darker colour ranges (with the exception of NightSky®) of Colorbond®steel.
We have had to replace many flashings made of non-Colorbond® steel, where the paint layer was chipped, or blistered and flaked away exposing the underlying steel to the elements. The results are rusted through flashings, leading to water ingress into the ceiling cavity.
We choose to make our flashings from Colorbond® to avoid these problems for our customers. Flashings made from Colorbond® will look as good as new, many years after they are first installed.
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Source : SteelSelect®