Self drilling screws are the primary fastener for metal roofing and light steel frame construction. Integrated drill point can drill, tap and fasten in one operation, saving a lot of working time on site.
Most roof self drilling screws come with EPDM bonded washers. The rubber washer compresses during tightening to seal the hole, preventing rainwater penetration. This waterproof structure is essential for metal roof systems.
Different drill bit lengths are available for different steel thickness. Short drill point for thin sheet, longer drill tail for thicker steel. Surface treatment options include zinc plating and rust-resistant coating. Many roof contractors stock self drilling screws for ongoing building projects.