
How to Install Corrugated Metal Roofing on a Flat Roof
Installing corrugated metal roofing on a flat roof requires proper substrate preparation, adequate drainage slope (minimum 1:40), and strategic fastener placement to ensure weatherproofing and longevity. What Is Corrugated Metal Roofing Installation and Why Does It Matter? ✓ Substrate preparation – Install solid decking (plywood or OSB) over existing flat roof structure to create a stable base for metal panels. ✓ Minimum slope requirement – Achieve at least 1:40 gradient through tapered insulation or structural modifications to










