How to avoid mold growth

13.07.2020 14:30

How mould can be avoided

A snack with a good wine, bread fresh from the oven and a nice piece of Camembert or Roquefort. Live like God in France. But what does this have to do with mould? For Roquefort (Penicillium roqueforti) and Camembert (Penicillium camemberti) cultures of mould are used, so they are deliberate and not harmful to humans.

How mould can be avoided

A snack with a good wine, bread fresh from the oven and a nice piece of Camembert or Roquefort. Live like God in France. But what does this have to do with mould? For Roquefort (Penicillium roqueforti) and Camembert (Penicillium camemberti) cultures of mould are used, so they are deliberate and not harmful to humans.

The situation is different, for example, with the mould Stachybotrys, it is unwanted, highly poisonous and can be found on walls, ceilings, actually it can occur anywhere where it finds good conditions to live. So we need to clarify what are good conditions.
Mould needs two main components to develop, maintain and grow. Water and organic nutrients, which are carbon compounds. That's all it needs. Organic nutrients, for example paper wallpaper, are a very good nutritional basis for moulds. But also silicone seals, as we find on windows, are ideal breeding grounds, because here the mould gets exactly what it needs. A combination of condensate (= moisture/water) plus silicone (= carbon). Therefore an infestation of different moulds is often found in the bathroom. Moist air, hair and skin flakes, soap films to which organic substances adhere and house dust, the perfect basis to promote growth. But how can we prevent the growth of mould? By not making the following mistakes:

Mistake 1: Wrong and insufficient ventilation/heating
Ventilation is important, because by airing the house you can remove excess moisture to the outside, even in winter or when it rains. It is often underestimated how important correct ventilation is. You should not leave the window permanently in the tilt position, because the exchange of moisture takes so long. It is better to fully open the window several times for a few minutes.

Mistake 2: Relative humidity not in view
We often feel uncomfortable above a relative humidity of 60%. It is scientifically proven that the optimum relative humidity is between 40 and 60%. Mould, on the other hand, grows well on the surfaces of materials at a relative humidity of 70 - 80%. Or in places that are actually wet such as window corners where water condenses.

Mistake 3: Avoid thermal bridges
Thermal bridges are places through which more heat from the building penetrates to the outside than through adjacent surfaces. The interior surface is cooler, which favours the formation of moisture and thus also the possible formation of mould. Often there are corners where the effect of the thermal bridge occurs. Unfortunately, it is not always possible to avoid corners, so it is all the more important to pay attention to the above-mentioned errors and to consistently pursue their avoidance. We also offer a mould stop mat for this purpose.

Mistake 4: Well meant, badly thought out.
Installing new windows in an old building does not always lead to a good result. Anyone who integrates new windows into an old building should be aware that the windows are the tightest part of the wall, at least as far as moisture circulation is concerned.
Window reveals should also be thermally insulated so that the water vapour does not condense in the corners of the windows or in the reveals. In addition, regular ventilation is also required here. If condensation should still form, it must be wiped off regularly.

Mistake 5: Keep an eye on wet rooms
Not only the silicone joint itself can become mouldy, over time the silicone can become loose and leak. In wet rooms we therefore speak of maintenance joints, they may have to be renewed so that water cannot penetrate the wall structures.

Leaking fittings can also cause extensive damage. If the problem is not detected, the walls can become soaked through with moisture, which continues insidiously.
This can go so far that entire rooms are no longer habitable.


Enter Comment