How to Tell That Your Facade Needs Maintenance
15. 8. 2025
The facade is probably the first thing everyone notices about a building. On many buildings, however, we also notice dark or greenish patches and coatings in addition to the colour. Take care of your facade before it needs costly repairs. We will show you how to tell that your facade is already crying out for help and a wash.
Visible signs of facade damage
Every day, a facade accumulates layers of dirt, weather exposure and organic deposits. At first these appear inconspicuous — perhaps a small smudge, a thin film of moss in a joint, or a hairline crack beneath the eaves. Gradually, however, the changes spread noticeably. A facade can also deteriorate without any obvious colour changes — for example, it loses its protective properties, becomes more absorbent and less resistant. That is precisely why it is important to notice these signs early. Washing and recoating a facade often costs only a fraction of what it takes to deal with more extensive damage later.
The most common symptoms
- Green or black coatings: Typically algae, moss or mould, most commonly on north-facing or shaded walls.
- Damp patches and staining: These indicate poor rainwater drainage, water ingress or a thermal bridge.
- Cracks in the facade: Small hairline cracks often signal the beginning of render deterioration.
- Peeling render or paint: The facade is losing cohesion; the substrate may have been compromised by moisture or frost.
- Grey or "dirty" patches: Settled dust, smog or exhaust fumes from surrounding traffic.
- Changes in surface texture or sheen: The facade looks yellowish or patchy and is losing its water-repellent properties.
What happens if you neglect your facade?
A neglected facade is not just a matter of aesthetics. Failing to address problems over the long term can have far-reaching consequences.
- Moisture in the structure: Increases heating costs and shortens the lifespan of the building.
- Health risks: Mould and algae release spores into the air, which can be particularly risky for allergy sufferers, children and the elderly.
- Insulation damage: Repairs then go beyond recoating and require more significant intervention.
- Reduced property value: The facade is one of the first things a prospective buyer notices.
Prevention is always better than costly repairs
Preventive maintenance means regular care at planned intervals. You are not waiting for a problem to arise — you are preventing it. Regular inspections, washing and facade coating are all it takes to extend the functionality and lifespan of your facade. At Umyjem to, we are happy to take care of preventive washing and facade maintenance for you.
The result is lower maintenance costs, a longer facade lifespan and a better-conditioned building.
5 signs it is time to address maintenance
- There are green or black patches or coatings on the facade.
- Damp patches, grey stains or cracks are appearing.
- The render is crumbling, peeling or looking "tired".
- You notice moisture inside the building or thermal comfort has worsened.
- The facade simply does not look the way it should.
For some buildings, a single wash is enough to make the facade look literally like new. Others may require more interventions, such as a new coat of paint. Either way, it is always an investment that is well worth making.
Wondering whether it is worth it? We are happy to show you real before-and-after examples from our work — and we can also carry out a no-obligation assessment of your facade.
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dirty = unhealthy facade?

Did you know that a dirty building facade can be a health hazard?

