Perforated galvanised steel sheet from Rackerman, available in 9 round-hole patterns from R2/T3.5 to R20/T27, in thicknesses of 0.7mm, 0.8mm, 1mm, 1.5mm and 2mm, and sheet sizes of 2 x 1m and 2.5 x 1.25m. Pre-galvanised (zinc-coated) steel gives strong corrosion resistance, making galvanised perforated sheet the right choice for outdoor, damp and exterior applications where uncoated mild steel would rust. Select your exact hole pattern, sheet size and thickness from the options above – every combination is a stocked specification supplied across the UK, cut to size on request.
Why choose perforated galvanised steel sheet?
Perforated galvanised steel combines strength and rust resistance with open area for airflow, light, drainage and visual effect. It is widely used for exterior ventilation grilles, machine and plant guards, screens and sieves, balustrade and balcony infill panels, acoustic screening, vehicle and trailer panels, agricultural screens and decorative facade cladding. Because the zinc coating is applied before perforating, this galvanised perforated metal is well suited to wet and outdoor environments; smaller holes such as R2/T3.5 give a finer, stronger panel, while larger holes such as R20/T27 give maximum open area and through-vision.
Hole patterns available
All patterns are round-hole on a staggered 60° triangular layout, the UK industry standard. The pattern code reads as R (hole diameter) / T (pitch, centre-to-centre spacing).
| Pattern | Hole | Pitch |
|---|---|---|
| R2/T3.5 | 2mm | 3.5mm |
| R3/T5 | 3mm | 5mm |
| R4/T8 | 4mm | 8mm |
| R5/T7 | 5mm | 7mm |
| R5/T8 | 5mm | 8mm |
| R8/T11 | 8mm | 11mm |
| R10/T13 | 10mm | 13mm |
| R10/T15 | 10mm | 15mm |
| R20/T27 | 20mm | 27mm |
Material grade & specification
Manufactured from pre-galvanised (hot-dip zinc-coated) mild steel to BS EN 10346, DX51D+Z, on a cold-reduced base. The zinc layer is metallurgically bonded before perforating and provides sacrificial protection, so cut and punched edges are protected by the surrounding coating. Supplied in a standard zinc/mill finish. Perforated galvanised steel sheet is supplied as a decorative and general-fabrication product and is not CE/UKCA-marked for load-bearing structural use. Certification against a specific gauge is available on request.
Sizes, thickness & tolerances
Sheet sizes: 2 x 1m and 2.5 x 1.25m. Thicknesses: 0.7mm, 0.8mm, 1mm, 1.5mm and 2mm. Heavier gauges give greater rigidity and load-bearing capacity; lighter gauges are easier to cut, form and handle for decorative screens. Material is produced to BS EN ISO 9001 tolerances. These are stock-size sheets – for bespoke cut-to-size pieces or trade quantities (5+ sheets) contact us for a project quote.
Delivery & offloading
Lead times are currently 3–5 working days. Perforated sheets are heavy, bulky items delivered on a pallet to mainland UK addresses. Please ensure suitable site access and someone available to assist with offloading. Free UK delivery is included.
Related perforated sheets
For indoor or paint-finished work, perforated mild steel sheet offers the widest pattern range at the lowest cost; for lightweight, naturally corrosion-resistant panels see perforated aluminium sheet. Browse the full perforated metal sheets range.