Perforated sheets and expanded metal mesh are often considered for the same jobs: screens, guards, walkways, façades and ventilation panels. They look similar from a distance, but the way they are made gives each different strengths.
How they differ
Perforated sheets are flat sheets with holes punched in a set pattern — round, square or slotted. The sheet stays flat and the open area depends on hole size and spacing.
Expanded metal mesh is made by slitting and stretching a sheet into a diamond pattern. The strands and bonds stay connected, so the material is a single piece without welds.
When perforated sheets make sense
- When a precise, uniform hole pattern matters — for appearance, filtration or airflow.
- When a flat, smooth surface is needed, such as cladding or panels.
- When the design calls for a specific open area.
When expanded metal makes sense
- When you want a rigid, one-piece open surface for guards, walkways or fencing panels.
- When a raised diamond pattern is useful for grip.
- When material efficiency matters, as the sheet is stretched rather than punched.
What to send with your enquiry
- Material thickness and sheet size.
- Hole or diamond size and pattern.
- Finish required.
- Quantity and any cutting or forming needed.
- The application — it helps us suggest the more suitable option.
If you are unsure which suits your job, describe the application and we will talk it through. Rainbow Steels supplies perforated sheets and expanded metal mesh from our Hooghly manufacturing unit, with our corporate office in Kolkata, West Bengal.