Roofing Screw

A roofing screw is a self drilling or self tapping screw with a washer, used to fix roofing sheets and cladding to purlins. It often has a hexagonal head and a drill point.

A roofing screw fixes roofing sheets and cladding to purlins and battens. It often has a sealing washer under the head to keep water out at the fixing point. It is driven with a power tool and matched to the thickness of the sheet and the supporting timber or metal.

The finish is a coated layer that gives corrosion resistance for outdoor exposure. It is not the same as zinc plating or hot dip galvanising. The coating protects the screw from weather and extends its service life.

This kind of screw is often made in carbon steel or stainless steel. Carbon steel with a coating is common for general roofing. Stainless steel is chosen for coastal or highly corrosive environments.

This is a general guide to checking this kind of part. It says nothing about any supplier's parts.

Ask for a certificate of conformance for the coating and base material. On receipt, check the coating for skips or damage and the washer for correct seating. Confirm the thread and point are clean and undamaged.