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How to renovate a façade with algae

Even though the façade may still fulfill its function, the build up of mould and algae doesn't leave a house looking the most attractive.  Below we advise you how to get rid of algae on a façade in 2 simple steps.

Why does algae emerge on a façade?

The appearance algae and mould on a façade is mainly influenced by water and moisture. Things such as increased air humidity, heavy dense rain, rising moisture from the render, construction issues (leaks) and condensing water.

Façade that are near wooded areas, dense vegetation, watercourses, lakes or in valleys and lowlands with less sunlight are also more prone. In these cases, it is necessary to consider the right architecture and correct selection of external plaster and thermal insulation system to ensure damage is prevented or minimised.

The walls must be treated regularly (washing of the façade, checking plumbing elements, painting, etc.). But what can we do if our façade is still prone to algae contaminated?

2 steps to a new façade

Before applying a new surface finish, apply a coat of the specialist cleaner Baumit FungoFluid to the render, and then apply a new high quality façade paint.

Step 1

Riasy na fasáde

Apply Baumit FungoFluid special coating to the render, let it work and clean the façade.

Step 2

Nová fasádna farba

Next, apply a new façade paint. Ideally Baumit NanoporColor or StarColor, which are the most resistant to algae.

Step by step working instructions

1. What do you need?

Ako odstrániť riasy na fasáde

You will need Baumit FungoFluid solution, a spray or paint brush, a hard binder brush, a container, a façade roller or machine painting equipment.

Check the façade and if the façade shows other deficiencies (cracks, decomposing render, etc.), it is necessary to remove them.


2. Product application

Nanesenie roztoku proti riasam

Apply Baumit FungoFluid antifungal product on the dirty façade with a spray, roller or a paint brush and leave the product to work for a min. of 12 hours. This step is important to prevent the living microorganisms from escaping into the surrounding environment during the subsequent steps where they could further pollute the already treated façade.

3. Façade cleaning

Odstránenie rias z fasády

With a brush remove dirt and microorganisms from the surface and thoroughly clean the facade with pressurised water.

Dispose of waste.

4. Product application

Zariasená fasáda

Allow the surface of the façade to dry and apply Baumit FungoFluid antifungal product on the render 1 - 2 times.

5. New façade paint

Nová fasádna farba

Apply two layers of high quality façade paint to the clean façade. The first coat is applied diluted with 10 - 15% water. After a break of a min. of 12 hours we apply 1 to 2 coats of the façade paint as required. Allow a min. of 4 hours between each coat.

6. Façade paint spraying

Striekanie fasádnej farby

Baumit façade paint may also be applied using airless spraying. It allows fast and even application of the façade paint in a short time even on large uniform surfaces.

Baumit products

Instructional video