Why your patio turns black
In Belgium, damp and shade encourage the growth of moss, lichen and algae. These micro-organisms cling to the pores of the surface, make it slippery and eventually damage it. A quick scrub is no longer enough: the dirt has to be lifted deep down and the cause treated.
We work on all patio surfaces: natural or reconstituted stone, tiles and porcelain stoneware, polished or exposed-aggregate concrete, slabs on pedestals. Each material has its weak point — and that is exactly where experience counts.
Our 3-step method
A long-lasting clean is much more than a quick pass with a jet. We work in three steps for a flawless result:
- Moss treatment applied beforehand to kill micro-organisms down to the root;
- Controlled pressure washing, with a pressure suited to the material (up to 140 bar on hard-wearing surfaces, greatly reduced on fragile ones) and a nozzle chosen so as not to gouge or make the surface porous;
- Optional water repellent, which limits water absorption and markedly slows moss coming back.
Adapting the pressure to the material
This is what makes all the difference between a professional and a hired machine: precise pressure setting. Adapted to each material, it preserves the joints, keeps your slabs sound and respects even the most delicate stone.
- Tiles and porcelain stoneware: medium pressure, working along the joints, without bringing the lance too close.
- Exposed-aggregate concrete: a diffuse, moderate jet so as not to loosen the gravel.
- Natural stone: often at low pressure, sometimes by brushing, followed by a dedicated water repellent.
A result that lasts
To clean less often, we offer a water-repellent treatment once dry, and an annual maintenance plan in spring. Our products are biodegradable and we always protect your flower beds and plants during the work.
Guide prices
| Service | Guide price |
|---|---|
| Tiles / porcelain stoneware | from €4/m² |
| Natural / reconstituted stone | from €6/m² |
| Polished or exposed-aggregate concrete | from €5/m² |
| Water repellent (extra) | + €4 to €8/m² |
| Minimum call-out charge | ± 80 € |
Prices are given as a guide only. The final price is set in a free quote, depending on the area, the condition of the surface and access to the site.
Areas we cover
We provide patio cleaning in Brussels and Brabant:
- Brussels: Uccle, Ixelles, Woluwe-Saint-Pierre, Auderghem, Watermael-Boitsfort, Woluwe-Saint-Lambert, Etterbeek, Forest, Anderlecht
- Walloon Brabant: Waterloo, Braine-l'Alleud, La Hulpe, Lasne, Rixensart, Ottignies-Louvain-la-Neuve, Wavre
- Flemish Brabant: Tervuren, Overijse, Hoeilaart, Rhode-Saint-Genèse, Beersel, Linkebeek, Kraainem, Wezembeek-Oppem, Drogenbos, Halle, Sint-Pieters-Leeuw
Frequently asked questions
The price averages between €3.50 and €10 per m², depending on the material and how dirty it is. A water-repellent treatment can bring the price up to €15 per m². A minimum charge of around €80 applies to small areas. Ask for a free quote for an exact price.
If badly set, yes: it can loosen joints, make a slab porous or mark the stone. Done by a professional, with a pressure suited to each material, it cleans deeply without damage. That is the whole point of trusting the job to a specialist.
Spring (around mid-March) is ideal for enjoying a spotless outdoor space, possibly with a second clean in late autumn. As soon as you see green deposits, black marks or a slippery surface, it is time to act.
It is not compulsory, but a water repellent applied once dry limits water absorption and strongly slows moss coming back. It is the most effective option for cleaning less often, especially on porous surfaces.