The aluminium creates an inert barrier coat while enhancing the long-term performance of zinc and its
ability to protect breaks in the coating. Galvalume coated steel has repeatedly been shown in industry studies, conducted over the
last 20 Years, to out perform the corrosion resistance of other coated metals.
This is why stone coated roof system is referred to as "The final Roofing System", and is Stone coated steel roofing occurred during World War II when tar and sand were used to cover galvanised steel bunkers.
After the war, the practice was commercialized and the first roofs were produced. Stone coated steel roofs have been protecting
buildings for close to 5oyears, but the product technology today bears little resemblance to early practices due to advances
in the chemistry of coatings.