Custom Designed Perforated Panels & Perforated Metal Products

  • custom hole shape
  • custom hole pattern
  • custom panel shape
  • custom material specification
  • custom fixing & forming requirements
  • perforated steel
  • perforated aluminium
  • perforated stainless steel

From Engineering & Process to Architecture & Environment

With extensive knowledge of both applications and the required manufacturing technology, we use highly flexible CAD-CAM sectional perforating technology, together with laser profiling and CNC forming machines to offer cost effective custom solutions to your requirements, from aesthetic architectural applications to engineering components for use in arduous & hostile environments.

Our background is ideal for the development of such a specialised service.
We are able to draw on our design and manufacturing experience in supplying perforated panels to the animal feed and by-products, quarrying and reclamation industries.
All of these industries have extensive requirements for perforated sheet products for grinding, mixing and screening applications, providing us with the necessary knowledge and experience to advise and design your panels and components for the best results.

The growing demand for “non-standard” perforation specifications comes from an industry requirement for improved designs and more efficient performance.

the service

Your requirements determine our design parameters.

Our perforating division provides a specialised advice and manufacturing service designed to meet each customer’s individual perforation requirements.
We have no standard hole sizes or shapes and no standard sheet dimension; these are all determined by your needs.

Manufacturing on C.N.C. controlled machines linked to off line CAD/CAM programming gives accuracy and consistency of product on production. We can perforate most ferrous and non ferrous materials, plastics and polypropylene and we have no minimum order quantity.


Hole shapes can be chosen from our comprehensive tooling library which is continually growing. If your requirement is not in our range, we can manufacture new tooling to suit.

We will be pleased to discuss your special requirements and advise on tooling needs.

We have tooling capacity to punch up to sizes of 100mm diameter and 70mm square holes, however these sizes are dependant upon material specification and sheet or component thickness.

We can also manufacture up to 20 different hole sizes or hole shapes in the same panel. Larger hole sizes can be produced on our laser profiling machine.

The geometry of the punched hole pattern can be influenced by the use of the panel just as the hole geometry can affect the performance of the panel in its application.

Our CAD/CAM systems give us the ability to turn the specifier’s concept into reality more easily and to quickly produce a working manufacturing programme. The system accurately produces complex patterns and design features to customer’s specifications and incorporates them on production.

Fixing apertures, notching, slotting and radius corners can all be carried out in production.

This service is of particular benefit if the perforated panel is to be fitted as part of a larger fabrication or structure.

All of our panels are hand finished to remove all sharp panel edges and corners, to ensure a product that is safe to handle & ready for installation.

We can also perform bending, rolling and fabrication operations to add further value to your product and reduce or eliminate further sub-contracting costs and logistics problems. We are pleased to discuss such requirements on a job-by-job basis.

Post perforating processing such as galvanising, powder coating, anodising, and plating can also be provided, although we normally recommend that these finishing treatments are carried out as close to the final installation as possible, particularly for aesthetic applications.


Perforated Balustrade Panels, Infill Panels & Cladding Panels

Our perforated panels for installation in balustrades, balconies, stairwells and cladding are custom manufactured for every project, therefore no edging strips or raw edges will be seen.

Our specialised service designs the perforated pattern to fit your panels. The unique feature of our service is that virtually any shape of panel can be perforated with virtually any number of holes. Complex panel shapes can be manufactured with great precision using our laser profiling machine in conjunction with our CNC punching machines.

Panel Size

The maximum size of panels we can manufacture is influenced by the material thickness and specification, together with the pattern required. We have manufactured panels up to 3.5 metres in length but these larger panels are dependent upon the availability of suitable materials, and therefore each requirement has to be individually assessed. Discs can be manufactured in one piece up to a maximum diameter of 1.5m. Above this size, manufacture in halves or segments is common.

Defining basic perforation patterns

Requirements which are not covered by or do not conform to these criteria should always be specified by submitting a drawing of the full sheet, with unperforated margins clearly marked, together with details of the required perforated pattern and its orientation relative to the sheet.


The basic perforation patterns most commonly used can be defined by determining the following criteria:

1. Hole shape – Hole size – Orientation of hole relative to edge of plate

2. Hole pattern – Distance between hole centres (pitch)

3. Orientation of pattern relative to edge of plate

4. Plain (unperforated) margins between holes and edges of sheet


Length (of sheet/plate) = will always be taken to be the longer of the two dimensions

Width or height (of sheet/plate) = the shorter of the two dimensions

Pitch = measurement from centreline of one hole to centreline of next hole

Bridge = measurement from edge of one hole to edge of adjacent hole – ie the amount of solid material between holes

Hole Shapes

Hole types are described according to shape and orientation;

R = Circular (Round)

C = Square

CD = Square, diagonals parallel to panel edges

H = Hexagonal

LR = Round ended slots (‘Obrounds’)

LC = Square ended slots

Hole Sizes

Hole sizes are specified in millimetres, width (w1) x length (w2), following the shape code for the hole.

Hole Pattern & Pitch

Following the code for hole shape and size, the pattern is specified using codes for arrangement (pattern) and spacing between hole centres (pitch)

For the T pattern (60º staggered pitch) and square U pattern (pitches equal in both directions), only the pitch p is stated.

For shapes R, C, CD, H in the U or Z arrangements, both pitch p1 & p2 are stated as p1 x p2 with the shorter pitch p1 stated first.

If relevant to the requirement, the pattern should be defined further by specifying whether the straight row of holes should run parallel to the long side or short side of the panel.

Plain Margins should be specified along long and short sides of the panel, or each panel side if the margins or sides are not symmetrical about the centre lines of the panel.

Open Areas for perforating patterns

(NB letters used in figures below do not reflect ISO7806 / BS6511 designation)

Perforating sheet metal reduces the yield strength of the sheet metal significantly.
For a typical ‘T’ pattern perforation at 40% open area , e.g. 10mm dia at 15mm staggered pitch, the strength will be approximately 27% of solid when measured parallel to the straight rows of the perforated pattern, and 33% of the strength of solid sheet measured perpendicular to the straight rows of holes.

Obviously any plain margins around the perforated area will increase the overall strength of a perforated panel and folded edges will add further rigidity.

The graph and table below show guidelines for estimating strength of perforated sheet metal for standard T pattern /60 degree stagger perforation at various open areas.

Strength of Perforated Metal

Hole Pattern & Pitch