Roofing performance depends more on installation than the sheet itself. Even premium sheets leak if overlap, slope, or fasteners are wrong.

Always confirm overlap direction, screw placement, washer quality, and minimum slope before you select profile and thickness.

Most early rust issues come from scratches during transport/handling and poor sealing at joints. Good packing and proper lifting matter.

If your site faces high wind or heavy rain, prioritize correct fastening pattern and profile rigidity instead of only increasing thickness.