Sandwich panel screw 5.5 × 90 mm — for steel, 6 mm drilling capacity, zinc-coated

Sandwich panel screws are an essential part of lightweight cladding systems. They connect walls and roofs to the structure of industrial buildings, warehouses, cold stores and pavilions. They must pass through the panel, anchor into the supporting material and clamp the facing without damaging its surface. SteelProfil helps select fixings for each task so that quick panel installation also delivers stable connections, weather protection and a neat finished appearance.

A specialist sandwich panel screw differs from an ordinary screw for thin sheet metal. Its length is selected to account for panel thickness, fixing-point geometry and the required anchorage. For steel structures, drilling capacity also matters. Some products have an additional support thread below the head to help maintain the position of the outer facing and limit deformation.

Corrosion protection and a washer with an EPDM seal also determine fixing quality. Suitable galvanising or another system-specific coating protects the steel against corrosion. EPDM resists ageing caused by UV, ozone and weather, making it useful for sealing external connections. Unspecified rubber does not provide the same basis for assessing durability. We focus on suitable, proven screws and correct selection.

These fasteners are used for sandwich panel roofs, façades and partitions. We help select versions for steel and timber substructures and for the intended fixing arrangement. Fixing through a roof panel’s raised rib differs from fastening within a wall panel joint. A properly assembled set reduces installation delays and helps maintain consistent workmanship across the cladding area.

Tightening requires control of the clamping pressure. The washer must seal the hole correctly while the facing retains its shape. The design specifies screw numbers and positions, taking account of loads, supports and building zones. Include flashing fixings, seals and other accessories when ordering. This allows the finished roof or wall to be assembled as a coordinated system rather than a series of improvised site details.

SteelProfil supplies screws and other accessories from current stock. You can combine fixings with an order for first- or second-grade sandwich panels to match the cladding budget to the project. Choosing second-grade panels still calls for care when selecting fasteners, because the connections transfer loads into the structure.

Promotional offers and favourable material and accessory prices help plan the complete purchase. Send us the panel type and thickness, the supporting material and the installation method so we can identify a suitable offer. Organise supplies through SteelProfil and keep the components needed for sound installation of the whole lightweight envelope close at hand.