Laser cleaning is safe when it’s done properly. Handheld and open-beam laser cleaners are Class 4, the highest hazard class there is. Used without the right controls they can cause permanent eye injury, burn skin and start fires. That’s why using one at work in the UK is regulated.
We get asked this most by site managers with laser work coming onto their site, and by facilities teams who’ve seen the videos and want to know what the catch is. Here’s the honest answer, and what to look out for if you’re bringing a laser contractor in.
Why a laser cleaner is hazardous
A laser cleaner isn’t a tool in the way a sander or a wire brush is a tool. It won’t kill you. It will blind you, in a fraction of a second, off a reflection you weren’t even pointing at.
There are four hazards to understand.
→ Eyes. Most industrial cleaning lasers work at a wavelength the human eye can’t see. There’s no bright beam to look away from and the blink reflex is too slow to help. A reflection off polished metal, glass or even a rougher surface can travel well beyond where the operator is aiming.
→ Skin. Direct exposure burns. The videos of people passing a hand through the beam to prove it’s harmless are the most dangerous thing online about this trade.
→ Fire. Enough energy to vaporise a coating is enough to ignite what’s nearby. Dust, solvents, timber and packaging all matter, particularly in occupied buildings.
→ Fume. What comes off the surface doesn’t disappear. It becomes airborne dust and fume. If the coating is lead paint or chromate primer, that’s a serious health hazard on top of the beam.
None of that is a reason to avoid laser cleaning. It’s the reason it’s controlled.
What UK law requires
Putting a Class 4 laser to work in the UK triggers the Control of Artificial Optical Radiation at Work Regulations 2010. On top of those sit PUWER, which covers work equipment and the training to use it, and COSHH, which covers the fume. Lead paint brings the Control of Lead at Work Regulations in as well.
Between them, they require:
→ A proper risk assessment for the job.
→ A controlled area, with access restricted to people who need to be there.
→ Engineering controls such as barriers and screens, rather than relying on PPE alone.
→ Extraction that captures the fume at source.
→ Eyewear rated for the specific laser in use.
→ Operators who are trained and competent.
→ In practice, a named person responsible for laser safety.
That isn’t paperwork for its own sake. It’s the minimum.
This is general information rather than legal advice. HSE is the authority worth reading directly.
What a properly run laser job looks like
If you’ve got laser cleaning happening on your site, this is roughly what you should see.
→ A proof of concept assessment before the work starts. The surface, the coating and the setup are all checked first.
→ A marked controlled area. Barriers or screens, warning signs and a clear point of entry.
→ An exclusion zone. People who aren’t involved are kept at a safe distance, including other trades.
→ The right eyewear on everyone inside. Laser safety eyewear has to match the laser’s wavelength and power. Ordinary safety glasses aren’t designed to protect against laser radiation.
→ Extraction running. Capturing the fume where it’s produced rather than letting it drift.
→ Fire precautions in place. Combustibles cleared or protected, and the site’s own fire rules followed.
→ Trained operators. People who know the hazard and the surface. Ours are trained on the specific lasers they use and work alongside an experienced lead technician until they’re competent to run a job themselves.
The problem nobody selling cheap lasers mentions
A growing number of small firms and individuals are buying machines, often direct from overseas, and running them with none of the above in place. Some don’t know the rules. Some do.
Either way, they’re likely to be breaking health and safety law. If they’re working on your site you have legal duties too, to manage contractors and co-ordinate safety on your site.
Importing a machine yourself puts the compliance burden squarely on you. Much of what’s shipping doesn’t meet UK requirements as it comes out of the box. It may arrive without proper documentation, with safety features missing or with eyewear that isn’t rated for the laser it came with.
What to look out for when you bring in a laser contractor
Ask these before anyone starts. A competent contractor will answer every one without hesitating.
→ Can I see the risk assessment and method statement for this job? Specific to your site, not a generic template.
→ How will the controlled area be set up and who keeps people out of it? Especially if other trades or the public are nearby.
→ Is the eyewear rated for the laser you’re using? For the operators and for anyone else who needs to be inside the area.
→ What extraction are you bringing? And do they know what’s in the coating they’re removing?
→ Who’s responsible for laser safety on the job? There should be a clear answer and a name.
→ What training have your operators had and how long have they been doing this?
→ Are you insured for laser cleaning work?
And a few red flags worth walking away from:
→ No paperwork, or a promise to send it after the job.
→ “It’s perfectly safe” with no controlled area in sight.
→ People standing near the work without laser eyewear.
→ No extraction on a job removing paint or coatings.
→ Anyone demonstrating the beam on their own hand.
So is laser cleaning safe?
In the right hands, yes. It’s one of the cleanest ways to prepare a surface. There’s no grit, no chemicals and no water to deal with. But the safety comes from the controls and the people, not from the machine.
That’s why laser cleaning is a specialist trade rather than a tool you pick up. For almost everyone, the safe route is to have a specialist do the work.
→ More on how laser cleaning actually works, the terms used on site in our laser cleaning glossary, and choosing between subcontracting, hire and buying.
Got laser work coming up and want it done properly? Get in touch with our team and tell us about the job.
