What is Galvalume Roofing Sheets?
Galvalume is a coating consisting of zinc, aluminum and silicon that is used to protect a metal (primarily steel) from oxidation. It is similar to galvanizing in that it is a sacrificial metal coating which protects the base metal.
GALVALUME sheet is produced according to ASTM Specification A792/A792M-97a "Steel Sheet, 55% Aluminum-Zinc Alloy-Coated by the Hot-Dip Process."
The alloy-coated product contains 55% aluminum, 43.5% zinc and 1.5% silicon by weight. Applied by the traditional hot-dipping process, Galvalume is perfect for applications that call for high corrosion resistance and heat reflectivity. It is typically used in construction, appliances, agricultural equipment and several non-exposed automotive components.
Thanks to its shiny spangled appearance, Galvalume can be used even without a layer of paint over it. It has better resistance to oxidation and can withstand temperatures up to 315°C without discolouration.
