Actually, it depends. Both galvanized and galvalume sheets are widely used as roofing materials. Galvanized sheet is covered with pure zinc; while galvalume coating includes zinc, aluminum, and silicon. The combination of zinc and aluminum offers GL sheets better corrosion and heat resistance. The data show that GL roofing can last as long as more than 50 years. Besides, it offers a smoother appearance with uniform spangles. In this case, the galvalume roofing sheet is better. However, galvalume coating is easy to break if it is scratched or dented, such as the cut edge. During installing the GL roofing sheet, it is necessary to paint the cut edge. In addition, the galvalume sheet is not suitable for where animals are confined, since the ammonia gas will degrade the metal. Just choose the right roofing sheet according to the use environment and your budget. If you want more information, please contact us!
Galvalume Roofing Sheet
