Mold on concrete, what to do? - Here is the answer!

from Tobias KleinUpdated on 19.05.2022

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If you have an old concrete floor at home or in your weekend house, you probably know from your own experience that a concrete floor loses its quality over time. It cracks, is uneven and mold forms. A brittle floor is very difficult to clean and mold cannot be removed with just a strong water jet. This helps only temporarily and does not solve the problem. Is a recurring mold annoying you? Read some tips to make your fight against mold easier.

Cracks and mold on the concrete floor are quite common phenomena that occur both indoors and outdoors. Not only that such places do not look nice, mold also poses a health risk. It causes allergies, eye inflammation, asthma, joint pain, inflammation of the respiratory tract, and some mutations can even lead to pneumonia and, subsequently, death. Therefore, it is in your best interest to remove mold as much as possible, whether in the garage, weekend house, cottage or on the terrace.

Zuerst muss der Boden gereinigt werden

It is clear that merely cleaning the floor can not have a lasting effect. However, this is the step with which you need to start. There are several ways to do this. The easiest is to remove the mold with a strong jet of water, but then it takes a long time to dry the concrete. And if they do not manage to properly ventilate the premises, the mold will continue to thrive.

An alternative is various chemical agents, steam cleaners or products that are used in the household on an ongoing basis. To combat the mold, you can also use bleach or vinegar, but they should not be diluted. You should be very careful with the bleach, because it can irritate the respiratory tract. Probably the most reliable solution is chemical means to combat mold.

However, this does not end the problem. What should I do after removing the mold so that it does not reappear?

A penetration coating is an economical variant

If you are looking for a simple solution, we recommend a penetration paint. Before its application, the floor must be perfectly dry, otherwise the paint will bring more worries than benefits. It is absorbed by the dry concrete, thus sealing the floor and preventing the formation of mold and moss.

Penetration paints do not cost very much and the application is very simple, even without outside help. However, these do not help when leveling a friable surface. In such a case should still apply a topcoat.

Ein Zementestrich wird für einen feuchten Untergrund nicht empfohlen

If the room where the concrete floor is very humid, cement screed is completely wrong solution. After all, with the coating you close the surface of the concrete, thereby preventing the evaporation of moisture. Over time, the surface will loosen and mold will continue to thrive.

If you want to use a screed, the concrete should be insulated from moisture and properly dry out. Then it will be an effective solution, which will remove the surface from irregularities.

Sie sollten vor allem die Feuchtigkeit im Boden nicht mit Fliesen einschließen

If you decide to lay one more layer on top of the concrete, tiles are another option. However, these should not be simply laid on the floor. It is recommended to first apply a penetration coating, respectively, insulate the concrete floor, so that the absorbency of the material is reduced. Otherwise, the concrete may again absorb moisture, which could cause mold.

Bottom of terramondi tiles

If you are looking for a solution for a constantly damp room, then you are better off with terramondi PVC tiles. This is because they have a unique system of drainage channels on the underside that counteract moisture. No moisture means no mold. In addition, PVC tiles are laid freely, so the flooring can be dismantled at any time to allow the concrete to dry, possibly apply a new penetration coating to protect against mold and lay the tiles again. This is not possible with ceramic tiles.

Which flooring is the best to ensure that mold never reappears?

Remember that mold is bad for your health. So do not hesitate and invest a little more money. Just forget about a penetration paint, it does not help much. Better not risk and do not use cement screed, because once you seal the floor, you will not know what happens inside until the top layer cracks. This also applies to ceramic tiles. However, if you don't underestimate the penetration coating, it might work - but if you don't live in a flood zone. There it would be better to use a flooring that can be removed, dried and re-installed.

The PVC tiles terramondi give them the opportunity to remove the receipt at any time. to see if the fight against mold is won. In any case, it makes sense to apply a penetration coating under the PVC tiles as well. Do everything possible and do not give mold a chance. As a reward, you will have a floor that is harmless to health.


Tobias Klein

Tobias Klein

Tobias Klein writes for terramondi technical articles about PVC tiles.
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