Roofing bolts are specialised heavy-duty fasteners designed specifically for securing roofing sheets, cladding panels, and corrugated materials to timber purlins or steel framework. Featuring a square neck beneath the hexagonal head, these bolts prevent rotation during installation, whilst the supplied nuts and washers create a secure, weatherproof fixing. MyToolShed.co.uk stocks roofing bolts from trusted manufacturers including Timco and Sirius, available in various lengths to accommodate different material thicknesses and applications.

These robust fasteners are essential for both new roof construction and repair work, providing reliable performance in demanding exterior conditions. The zinc-plated or galvanised finishes offer corrosion resistance, making them suitable for long-term exposure to the British weather. Whether you're installing metal sheeting on agricultural buildings, industrial warehousing, or domestic outbuildings, quality roofing bolts ensure structural integrity and weather resistance.

Applications

Roofing bolts are commonly used by:

Roofing contractors installing corrugated metal sheets and profile cladding systems
Agricultural construction specialists building barns, stables, and farm storage facilities
Industrial fitters working on warehouse and factory roofing projects
General builders constructing garages, workshops, and commercial premises
DIY enthusiasts erecting garden sheds, carports, and outdoor storage buildings
Maintenance teams carrying out repairs to existing metal roofing and cladding

Choosing The Right Roofing Bolts

When selecting roofing bolts from MyToolShed.co.uk, consider these key factors:

Length: Measure the combined thickness of roofing material, insulation, and purlin to determine the minimum bolt length required, allowing sufficient thread engagement through the nut
Diameter: Common sizes include M6, M8, and M10, with larger diameters providing greater load-bearing capacity for heavier gauge materials
Material and finish: Galvanised or zinc-plated options offer corrosion protection essential for exterior applications exposed to moisture
Head type: Hexagonal heads accommodate standard spanners and sockets, whilst the square neck section prevents spinning during tightening
Supplied components: Verify that nuts and washers are included, with larger washers helping to distribute load across thinner materials
Quantity requirements: Calculate fixings needed based on manufacturer recommendations for spacing along corrugation peaks and sheet overlaps

Frequently Asked Questions

What's the difference between roofing bolts and coach bolts?

Whilst both feature a domed head and square neck, roofing bolts are specifically designed for metal roofing applications with hexagonal heads for easy tightening. They typically come supplied with nuts and washers suited to clamping thin metal sheets, whereas coach bolts are primarily used for heavy timber connections.

How many roofing bolts do I need per sheet?

This depends on sheet size and exposure conditions, but typically you'll need fixings at every fourth corrugation along purlins, with additional fixings at overlaps and edges. Check manufacturer guidelines for your specific roofing material and local wind loading requirements.

Can roofing bolts be used with timber purlins?

Yes, roofing bolts work excellently with timber purlins. The square neck section grips the roofing material whilst the bolt passes through pre-drilled holes in the timber, with the nut tightening from beneath to create a secure fixing without crushing the roofing sheet.