The physical gauge and thickness of the metal panels are critical determinants of the system's resistance to foot traffic, impact damage, and aesthetic issues like oil canning. For general use, 26-gauge steel is acceptable, but for areas with heavy snow loads (not applicable in Singapore) or where roof access for maintenance is frequent, a heavier 24-gauge (or 0.61mm thickness) panel... https://kkroofspecialist.com.sg/metal-roofing-singapore/