Roofing screws
The sheet is the outer layer. The thread needs to suit what it engages.
Enquiry basis Per box, confirmed on enquiry.
Supply scope: washer-backed screw selected for the stated sheet and support. No fixing pattern or wind-load capacity is assigned by this catalogue.
A roofing screw combines a metal fastener with a sealing washer for a compatible sheet-fixing detail. The screw's steel grade or coating, thread and point must suit the support and exposure. A drill-point screw intended for steel support is not automatically the right choice for timber.
The washer is part of the assembly. Its sealing material, backing and dimensions affect contact with the sheet. Confirm the actual elastomer, such as EPDM where specified, rather than assuming every black washer is made from the same material.
- Support
- Timber or metal, with thickness and material details where known.
- Point and thread
- Match the support and required drilling or engagement range.
- Length
- Allow for the full build-up and the engagement required by the fixing detail.
- Head and drive
- Confirm head form and setter fit, not just outside screw diameter.
- Washer and finish
- Backing material, seal type, diameter and exposure-compatible screw finish.
More torque is not more weather protection.Overdriving can distort a washer or damage the sheet; underdriving can leave a leak path. Follow the roofing system and fastener instructions for the setting method.
