How to cut expanded metal
Updated: 23 October 2026
The sheet is already the one you bought, and it is too wide for the opening. This is how to cut expanded metal once the mesh is chosen: mark the line, clamp the piece, cut with a tool that can take the strand you have, then file the edge. The offcut does not become a machine guard because you trimmed it. Prices sit on the [expanded metal comparison](/hub/diy-supplies/expanded-metal). Peter F. used Cadisch, the Health and Safety Executive, and Electrical Safety First on 21 October 2026. We did not cut these sheets. A qualifying purchase can earn a commission at no extra cost to you.
The sheet is already the one you bought, and it is too wide for the opening.
The sheet is already the one you bought, and it is too wide for the opening. This is how to cut expanded metal once the mesh is chosen: mark the line, clamp the piece, cut with a tool that can take the strand you have, then file the edge. The offcut does not become a machine guard because you trimmed it. Prices sit on the expanded metal comparison. Peter F. used Cadisch, the Health and Safety Executive, and Electrical Safety First on 21 October 2026. We did not cut these sheets. A qualifying purchase can earn a commission at no extra cost to you.
Our top picks
| Badge | Product | Edge warning | Metal and finish | Profile | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  PH PandaHall PH PandaHall two-piece sheet | Not stated | 304 stainless claimed | Not stated | 4.4 | about £16.39 | View offer |
 Gisafai Gisafai four black sheets | Sharp edges in reviews | Black steel | Flat | 7.0 | about £68.11 | View offer | |
| Best value |  National Hardware National Hardware 12 inch sheet | Shears failed for one reviewer | Plain steel; protect against corrosion | Flat in reviews; not on the spec row | 6.2 | about £26.87 | View offer |
Mark it and clamp it
Mark the cut before you pick up a tool. A diamond is a poor straight edge, and a coil needs a length mark as well as the width you bought. Use a marker that shows on the finish, including black coating, and allow for the waste the blade takes. A line on a loose sheet moves as soon as a strand snags.
Clamp both the piece you are keeping and the offcut. Cadisch starts there, because a loose sheet walks. Two clamps are a fair minimum on a sheet about 60 by 30 cm. Electrical Safety First’s grinder note adds a UK 3-pin plug and sparks kept off anything that can burn. If you cannot clamp it, do not cut it. Profile after the cut is the raised or flattened expanded metal page.
Snips or a grinder
Choose the tool from the strand, not the photo. Cadisch allows tin snips, power shears, or an angle grinder with a metal blade, then a file. Buy Metal Online puts snips at about 24 SWG and thinner, then a hacksaw or nibbler, and a metal cut-off wheel beyond that. Eye and hearing protection go with the grinder.
These listings do not print a strand. PandaHall’s 0.17 cm line is not one, and the title also says perforated. National Hardware prints about 0.1 cm. One reviewer said shears failed and a grinder did the work. Those reviews are not tagged United Kingdom. Stop if snips roll the diamond shut. A masonry disc is the wrong wheel. If sparks would land on fuel or timber shavings, leave the cut. Missing thickness is a buying problem, on the expanded metal buying guide.
Edges, gloves and sparks
The edge is sharp before you file it. Gisafai reviewers in the stored United States sample say the lattice cuts on the sheet as sold. Wear gloves to pick up, mark, and snip. The Health and Safety Executive also says to take gloves off where they can catch in a bench drill. A grinder still needs eye and hearing protection.
File the burr. Snips leave a lip and a disc leaves a sharp edge. A filed edge is easier to handle. It is not a guard, and it does not weatherproof plain steel. National Hardware still says you must protect the steel against corrosion. Keep sparks off solvent, sawdust, and the plastic the sheet arrived in.
When to stop
A smaller loose square is still not a machine guard. ExMesh cages are hot-dip galvanised to EN ISO 1461:2022. Your offcut has none of that paperwork. A burn-barrel comment is not a heat rating.
You can shorten the 20 m coil with the same clamp-and-file habit. You still have no strand size, so snips are not promised, and the shorter strip is not stainless for a damp leaf. Call a professional for a guard, a public walkway, a structural wall, or any edge that could fall on someone. Stop if you cannot clamp the work. A filed line that no longer catches a cloth is the end of a DIY trim.
Common questions
Can I cut expanded metal with tin snips?
Sometimes, and only on a light strand. Buy Metal Online puts snips at about 24 SWG and thinner. Cadisch lists them beside shears and a grinder, after the mesh is clamped. These listings do not print a strand, and one National Hardware reviewer said shears would not cut. If the snips stall or crush the diamond, switch tool.
When do I need an angle grinder?
Use a grinder when snips or shears will not take the strand, with a metal cut-off wheel, the sheet clamped, and eye and hearing protection on. Electrical Safety First expects a UK 3-pin plug and sparks kept off anything flammable. The National Hardware review sample is the practical example: shears failed, and a grinder or bolt cutters did the work. A masonry disc is the wrong wheel.
Should I wear gloves?
Wear gloves when you handle and snip the mesh, because the edges cut. Gisafai reviewers report that on the sheet as sold. The Health and Safety Executive also says to avoid gloves where they can catch in a bench drill. Gloves for the mesh, no gloves at the rotating drill. Eye and hearing protection still apply if the tool is an angle grinder.
Will a cut sheet become a machine guard?
No. Trimming a square changes its size. It does not add a frame, a test, or a galvanising standard. ExMesh cages are a different product, hot-dip galvanised to EN ISO 1461:2022. A loose sheet, including one you have deburred, is not that cage. Guards, walkways, and anything overhead belong with a fabricator.
Can I cut the brick coil with the same method?
You can trim a length if you mark it, clamp it, and file the end. The AB Tools pages do not print a strand size, so snips are not promised. A shorter strip does not set the cover or the lap, and it does not suit a damp external leaf.
Related pages
Sources
Public UK sources and the amazon.co.uk listings compared on this page. Updated 22 October 2026.
- The Expanded Metal Company: how to measure and specify (retrieved 22 October 2026)
- Metal Mesh UK: technical notes (retrieved 22 October 2026)
- BSI: BS EN 845-3:2013+A1:2016 bed-joint reinforcement (retrieved 22 October 2026)
- TECO: expanded metal lath coil (retrieved 22 October 2026)
- Grayson: galvanised brick reinforcement (retrieved 22 October 2026)
- HSE: using the right type of PPE (retrieved 22 October 2026)
- Cadisch: safety when working with expanded mesh (retrieved 22 October 2026)
- Consumer Rights Act 2015 (retrieved 22 October 2026)