The choice of metal substrate is crucial and typically narrows down to coated steel (Galvalume or Zincalume) or Aluminum. Galvalume (steel coated with 55% Aluminum and 43.4% Zinc) offers exceptional durability and strength at a more economical price point. The zinc component provides sacrificial protection, while the aluminum resists rust. However, for properties located in coastal or... https://kkroofspecialist.com.sg/metal-roofing-singapore/