Sandwich panel fastener, for timber, zinc-coated, 6.3 × 113 mm

A thick sandwich panel needs a fixing that connects the outer facing to the structure through the entire insulation layer. A dedicated screw forms part of this assembly: its length, thread and washer address the requirements of a multilayer component. With the right fastener, lightweight cladding can transfer the specified loads to the building frame while retaining its protective surface function and orderly appearance.

In a sandwich panel, the supporting substrate lies much deeper than it does beneath a single sheet-metal covering. The screw’s working length must account for this distance and provide anchorage in the structure. Available types are designed for steel, timber or other specified substrates, allowing the fixing to match the particular frame. Selection therefore considers the complete connection, from outer sheet to support. Length is one characteristic alongside load capacity and anchorage type. This matters on warehouse façades exposed to wind over a large area and on roofs that transfer loads through many points. The fixing becomes a predictable part of the envelope’s structural behaviour, rather than simply a way to hold the panel during installation.

The metal washer distributes pressure over the facing, while the seal helps protect the hole against water. Suitable systems use EPDM, a synthetic rubber with good resistance to weathering, UV and ozone. These parts must work together because the panel combines thin metal facings with a much thicker core. Instead of concentrating the whole force under a small head, the dedicated assembly provides a considered contact area. This is particularly useful on roofs and walls with a regular fixing grid, where each point affects the complete envelope. The correct type and proper seating let the fastener perform without unnecessarily deforming the panel surface.

Self-drilling versions for steel structures can make the connection without a separate pilot hole, within their declared drilling capacity. On a large hall, this reduces the operations repeated on successive panels. Different lengths retain this convenience as insulation thickness changes. A protective metal coating and a suitable colour for the visible head combine environmental resistance with appearance. The complete fastener contains coordinated parts, making the same solution easier to repeat across successive wall or roof bays. For the investor, this means assembling an envelope whose core, facings and fixings work together. The correct screw supports the panel’s advantages instead of restricting them at the connection.

SteelProfil supplies sandwich panel screws and helps select a version for the structure and panel thickness. We have products available from stock, while our wider range includes first- and second-grade materials. Promotional offers and competitive prices make it easier to purchase the envelope together with the necessary fasteners.