FRENNL
Facade cleaning

Professional facade cleaning.

We remove dirt, moss, graffiti and pollution marks. Your facades get their original look back, without damaging the materials.

Free quote within 6 hours
What’s included

Matched to every type of facade.

Matched to every materialStone, brick, render, cladding. The technique is matched to the material.
VCA-certified techniciansSafe working on any type of site.
Scheduled workAt your pace, with as little disruption to the building as possible.
Quote within 6 hoursFree, no-obligation estimate.
Render or ETICS facade?

A dedicated page, with assessment and guide prices.

Render isn’t treated like stone or brick. The method depends on the substrate (ETICS or solid masonry) and the type of soiling (green, black, chalking). Our approach, our two cleaning methods and guide prices are on a dedicated page.

See our page on render →
By material

Every facade has its technique.

Natural stone, brick and cladding don’t react the same way to pressure or products. We always assess the material before choosing the method.

MaterialTechnique usedRecommended frequency
Natural stoneGentle cleaning, soft blasting if neededEvery 5 to 10 years
BrickControlled low pressure, anti-moss treatmentEvery 5 to 8 years
Metal or composite claddingNon-abrasive cleaning, no harsh solventsEvery 1 to 2 years
Render / plaster / ETICSSee our page on renderAfter assessment
How we work

Never a standard treatment.

01Material assessmentWe identify the substrate and the type of soiling (moss, pollution, graffiti) before any work.
02Test on a small areaWe validate the technique on a small area before tackling the whole facade.
03Preventive treatment availableWater repellent or anti-moss treatment on a clean, dry substrate, to delay the next build-up.
Guide prices

A ballpark figure before your detailed quote.

MaterialTypical useGuide price
Brick / stoneLow-pressure or gentle cleaning€10 to €20 per m²
CladdingNon-abrasive cleaning€8 to €15 per m²
On-site assessmentBefore any quoteFree, included
These figures are indicative and reflect typical prices on the Belgian market. The exact price depends on the material, the area, how dirty it is and access. A free on-site assessment lets us give you an accurate quote.
Available everywhere

Across Wallonia, Brussels, Flanders and Luxembourg.

Namur Brussels & Walloon Brabant Liège Charleroi & Hainaut Luxembourg
Frequently asked questions

Before you call us.

Does facade cleaning damage the material?+
No. We choose the technique to suit your facade’s material, so it isn’t damaged.
Do you remove graffiti?+
Yes, graffiti removal is part of our facade cleaning.
Are there seasons to avoid for facade cleaning?+
We usually avoid frosty periods, when the facade doesn’t dry properly and some materials can be damaged. The rest of the year is fine.
Do moss and lichen come back quickly?+
It depends on exposure (north-facing, shaded) and humidity. A preventive water-repellent or anti-moss treatment slows their return considerably.
Do you guarantee the result?+
We always test on a small area first, precisely to validate the result and avoid unpleasant surprises across the whole facade.
Do you work on listed or heritage buildings?+
Yes, with a suitable gentle technique, validated by a prior test, that respects the original material.

Free quote, within 6 working hours.

Tell us what you need, no obligation.

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