Laser brick cleaning is a modern method of removing dirt, paint, soot and the remains of old coatings without aggressive chemicals or abrasive methods. Laser technology cleans the brick surface precisely while keeping its natural structure, which is why it is used both in the restoration of historic buildings and in refreshing modern facades.
Why does laser cleaning work so well on brick?
Brick is a porous material that absorbs dust, soot, weathering deposits and all kinds of dirt over the years. Old facade paint, graffiti and biological growth are often a problem too. Traditional cleaning methods such as sandblasting or chemicals can damage the surface, erode the mortar joints or change the natural look of the brick.
Laser technology works in a completely different way. The laser beam removes the layer of dirt and, with the right parameters, does not affect the structure of the material. This makes it possible to clean a facade thoroughly without damaging the brick when the parameters are set correctly, which is especially important when restoring older buildings and listed buildings.
What kind of dirt can be removed from brick?
The laser handles many kinds of contamination that build up on facades and walls over the years.
Among other things, it can remove:
- old paint,
- soot after fires,
- traffic grime,
- weathering deposits,
- industrial deposits,
- traces of graffiti,
- surface staining.
Every material is assessed individually so we can choose the right laser settings.
Removing paint from brick
One of the questions we hear most often is: how do you remove paint from brick without damaging it?Many older buildings have been painted over and over again through the years, completely hiding the natural structure of the brick. In such cases laser cleaning gradually removes one layer of paint after another, revealing the original material.
Because the laser is so precise, architectural details can be preserved and the risk of the damage that mechanical methods often cause is reduced. If you are specifically interested in laser paint removal, we have also prepared a separate page describing the whole process.
Cleaning after a fire: soot on brick, wood, steel and stone
After a fire, soot and deposits settle on walls, wood, steel structures, stone and concrete. We have laser cleaned them in private houses, in halls and plants, and in historic buildings and churches.
The laser removes soot dry, without water or chemicals, so we add no extra moisture to the masonry or the wood. It does not abrade brick or wood the way sandblasting does, so the original surface remains. We quote after a test on a small area. More about wood and metal.
How brick is usually cleaned and what to use instead
Before people call us, they have usually heard of sandblasting, pressure washing or chemical cleaners. Each method has its place. Here is what they do to brick and when it is worth looking for another way.
- Sandblasting: quickly removes paint and dirt from large, flat walls and is usually cheaper on big areas. But it wears away the hard, fired outer layer of the brick and digs out the joints, so the brick soaks up water and dirt more easily.
- Pressure washing: good for light, fresh dirt. Water gets into the wall, and high pressure washes mortar out of the joints. The wall takes a long time to dry.
- Soda blasting: gentler than sand, but still abrasive. Soda stays in the pores and can cause white efflorescence.
- Chemicals (strippers, acid): dissolve paint or deposits, but soak into the brick, must be rinsed off, and the waste has to be disposed of. Acid can discolour brick and weaken joints.
- Wire brush and grinder: for small areas only. The disc tears off the brick face and leaves marks.
The laser removes paint, soot and deposits layer by layer, without abrasives, water or chemicals. With the right settings the brick face and joints are preserved, and the fine dust from the removed layer is collected by extraction. On large, flat walls it is slower and costs more per square metre than sandblasting, which is why we test a small area before quoting.
| Method | Wears brick and joints | Water / chemicals | Clean-up | When it makes sense |
|---|---|---|---|---|
| Sandblasting | yes | no | lots of abrasive and dust | large, flat walls when price matters |
| Pressure washing | joints at high pressure | lots of water | water and mud | light, fresh dirt |
| Soda blasting | slightly | soda stays in pores | soda dust | thin coatings |
| Chemicals, acid | no abrasion, but soaks in | chemicals and rinse water | waste for disposal | thick paint on small areas |
| Laser | no, with the right settings | no water or chemicals | fine dust collected by extraction | heritage buildings, details, facing brick where wet or abrasive methods are not allowed |
Brick restoration before further work
Laser cleaning is very often the first stage of facade restoration. The cleaned surface is ready for sealing, repointing or further conservation work. With the dirt thoroughly removed, the real condition of the brick is much easier to assess and the next stages of restoration easier to plan. The method works on residential buildings, tenement buildings, industrial buildings and historic buildings that need particular care.
What you gain with a laser on brick
The laser removes soot, deposits, graffiti and old paint from brick dry, without abrasives, water or chemicals. We set the parameters after a test on a sample.
Contact-free cleaning
A contact-free method that does not abrade the material underneath.
Highly effective
Soot, deposits, graffiti and old paint from brick and joints.
No chemicals
No chemicals or abrasives.
Wide range of uses
Facades, tenement buildings, walls, listed buildings.
See how it looks in the video
Two of our videos of OMME laser brick cleaning. No abrasive, water or chemicals.
Frequently asked questions about laser cleaning of brick and facades
Wondering whether a laser can handle old paint, soot or dirt on brick? Below you’ll find answers to the most common questions about laser cleaning of brick and facades. If you can’t find what you’re looking for, contact us - we’ll be happy to advise and prepare a quote.
Yes. We have cleaned soot and deposits after fires from brick, wood, steel, stone and concrete, in houses, halls and historic buildings. The laser works dry, without water or chemicals. We quote after a test on a small area.
A grinder with a disc or wire brush quickly removes the surface, but it wears the brick along with the dirt, makes a lot of dust and leaves disc marks. On old brick indoors or on a townhouse facade this often damages the material. The laser cleans without touching the surface, so the brick keeps its texture and edges.
Hydrochloric acid dissolves mortar residue, but it soaks into the brick and joints, can leave discolouration and white efflorescence, and everything has to be rinsed thoroughly with water afterwards. Store-bought cleaners work similarly, just weaker. The laser removes paint, soot and deposits without chemicals and without rinsing. With a thick layer of mortar or plaster we always test a sample first.
Sandblasting quickly removes dirt and paint, but it also wears away the hardest outer layer of the brick. Afterwards the brick is rougher, absorbs water and dirt faster, and sharp edges get rounded. On large, flat areas it can be cheaper. When the brick should keep its original look, the laser is better: it removes the dirt and leaves the brick.
A pressure washer will wash off dust and loose dirt, but water under pressure washes mortar out of the joints and soaks into the brick. Old, soft brick can crumble and flake after such washing, and a damp wall takes a long time to dry. The laser cleans dry, without water or abrasive, so it also suits old brick and facades that should not get wet.
It depends on the material, the type of coating and how many layers have to come off. A layer of soot comes off quickly, six layers of oil paint from profiled joinery much more slowly. We measure the time during the sample test and give a realistic schedule based on it. The laser is not the fastest cleaning method, it is the most precise, and we say so openly before work starts.
The cost depends on many factors, such as the area to be cleaned, the type of dirt, how much has built up and access to the work area. We quote every job individually after seeing photos or the scope of work.
Yes. Laser technology is often chosen for restoring brick facades because it cleans the surface without aggressive abrasion. This preserves the original texture of the brick and reduces the risk of damage.
The laser removes old paint, soot, atmospheric deposits, biological growth, discolouration and many other kinds of dirt that build up over a building’s life. Every surface is assessed individually before work starts.
Correctly performed laser cleaning does not damage the material. The technology acts selectively on the layer of dirt or paint, which is why it is also used in the restoration of heritage buildings and historic facades that require particular care.
Yes. Laser cleaning removes old paint from brick in a controlled way, without chemicals. With the right parameters, the natural structure of the brick is revealed gradually while keeping its appearance.
Get a quote today
Let’s talk about your project. Send us an enquiry and we’ll prepare a quote and choose the right technical solution.
