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Here you will find a list of frequently asked questions on a wide range of topics relating to the application of Moosfrei and the associated infestations of algae, moss, lichen and mould

The choice of plaster also plays an essential role. So-called impregnations or lotus effects unfortunately do not deliver what they promise – at least when it comes to algae growth. Dew drops are many times smaller than raindrops and therefore do not run off by themselves. However, since the impregnation now prevents the absorbtion by the plaster, the dew remains on the façade until it is completely dry – so the façade remains damp for longer. If a conventional plaster is chosen, the condensation water is absorbed and distributed over a larger area.

The black discolouration that is often seen above individual windows is a sign of incorrect ventilation. This discoloration is due to heavy algae growth. Due to incorrect ventilation behaviour (continuous tilt ventilation), warm and moist air always escapes to the outside and rises up the façade. As a result, more condensation forms directly above the windows, especially in the cold seasons – and where it is damp, algae also grow.

Thermal insulation is the main reason for the early formation of moss and algae on domestic façades. The plaster is so strongly decoupled from the masonry by the insulation that it does not receive any heat from the inside. Due to the low heat storage capacity, the outer skin cools down quickly at night and condensation forms on the façade. This effect can be compared with a cold beverage can in summer.

Façades in rural environments are more affected than urban properties. Adjacent green areas, forests or individual trees and shrubs also favour the growth of algae. Nearby rivers, lakes or ponds as well as biotopes also increase the microbial infestation.

The weather side of the house is often particularly badly affected, as the sun hardly reaches this side.

Objects directly adjacent to house façades (flower pots, rubbish bins…) should also be avoided.

Window sills that are too short do not properly drain off the rainwater that hits them, so it flows down the façade. So-called “runners” are often created under the benches.

The air has become cleaner over the last few years. This favours the algae spores, which can reach the façade unhindered by winds.

Too little or no roof overhang contributes to the infestation, as a lot of rainwater also reaches the façade.

This has also risen steadily in recent years. Algae like it warm and humid.

This type of algae often develops near forests, trees or shrubs.

This species is very often confused with “road grime” or “dirt”. If your façade has a dark, large-scale discolouration and is not located directly next to a highway or heavily trafficked road, then it is most likely a black algae infestation.

It contains the pigment carotenes (from Latin Carota: “carrot”) and therefore exhibits this reddish discolouration. This type of algae has a very unique appearance. It usually appears in the form of red vertical stripes and it only affects certain types of plaster.

Since we are talking about Moosfrei’s ingredient that is simply applied to the infested areas and cleans itself, we are not talking about cleaning in the classic sense, but about a treatment with a long-term effect.

We do not recommend trying to remove algae on your own. Algae infestation can only be removed with a lot of water pressure without appropriate pre-treatment. In the process, you flush out the plaster and it becomes rougher. In addition, one does not kill the infestation pore-deep. As a result, algae and fungi now grow even faster and are visible again within a few months. In addition, the results achieved are usually not satisfactory, as clear streaks will be seen when cleaning with high pressure. Our Moosfrei agents cannot be bought and applied by yourself.

Of course, you can have the façade repainted. With our method, however, it is possible for the first time to completely remove moss and algae infestation without expensive and time-consuming repainting. Through our treatment the algae and mosses are killed pore-deep and 100% as well as dissolved from the underground. In the process, the plaster is neither roughened nor rinsed out. Due to the deep effect we can protect the façade against new infestation for approx. 10-15 years (this applies under best conditions). Due to the fact that we do not need scaffolding, this procedure is extremely inexpensive. You save about 80% of the cost compared to repainting.

So that we can submit a binding offer to you, we need the following information from you:

Last name/first name:
ZIP code/city:
Which substrate is dirty:
How large is/are the area/s:
Desired date for the treatment: