Methods of preventing dampness. How to avoid fungi and moulds in the flat?


According to experts, the average level of humidity in the flat should range from 45% to 55%. Each deviation from this standard may cause discomfort. Too low a level of humidity makes the air too dry. A significant increase in this level, on the other hand, which is maintained for a longer period of time, may not only damage the walls as a result of growing moulds and fungi, but it may also lead to serious health problems.

How to control the proper level of humidity in the flat then? First of all, it is necessary to find the source of the dampness and decide how to remove the excess of it. The maximum dampness is usually found in buildings without proper thermal insulation or in newly constructed facilities, where the walls still contain a lot of water after the recently completed finishing works. Poor ventilation (or lack of ventilation) is often the reason for excessive dampness. Tightly closed plastic windows and doors let very little fresh air into the flat and an ineffective ventilation system is incapable of reaching a proper air exchange rate.

However, it needs to be remembered that also basic household chores contribute to an increase in the level of dampness. Everyday activities, such as washing, cooking, ironing, may cause the air humidity to rise even by about 80-90%! It is also worth noting how the bathroom looks after we take a hot bath or shower. Small bathrooms, often without windows, drying rooms where a lot of wet laundry is dried or even poorly heated closets are rooms, which are particularly exposed to the development of fungi and moulds. This is usually accompanied by an unpleasant smell.

We are often surprised to notice black mould in the bath corner, instead of white grout. Similarly, during a major cleaning, we often move a wardrobe away from the wall to discover black and green mould on it. Fungi and moulds like high humidity levels, as well as dark, poorly ventilated areas and dust.

It is the greatest problem for those who cannot prevent the occurrence of the mould problem anymore. Unfortunately, they need to resort to chemical agents or major flat renovation. Fungi are very difficult to get rid of if they have grown deep into the wall.

If excessive dampness is a result of insufficient insulation of the building, it is worthwhile to take measures protecting against the development of fungi in the flat, focusing mostly on an efficient ventilation system and the frequent airing of the rooms. Dehumidifiers can also be of assistance here.


Household dehumidifiers are very effective in smaller rooms, such as bathrooms, garages and drying rooms. Their attractive appearance does not interfere with the aesthetic quality of the entire interior, owing to which they can be successfully used, even at the most elegant places in the house. They are usually small-sized, light and easy to transport and their silent operation does not disturb the residents. Some household dehumidifiers, such as the Master DH 720 model, are additionally equipped with a UV lamp killing bacteria and germs. Most of them also have an activated carbon filter to absorb unpleasant smells.

It is much easier to prevent the development of fungi and moulds if the proper level of dampness is maintained. One should also remember about appropriate ventilation, frequent opening of the windows (provided that the air outside is not too humid), as well as about devices, which can also be helpful if used regularly.

More information about household dehumidifiers can be found at dehumidifiers page.