CAUSES OF MOISTURE
THE ANALYSIS ALWAYS PRECEDES PLANNING AND SANITATION
Only if one knows the cause of the damages by humidity and / or mold, is it possible to carry out a promising sanitation.
Where do mold and damp walls come from?
What is the cause of a wet basement or damp stains and mold in the living space? The answer is complex, because the humidity in buildings can have very different causes.
- Damp walls due to condensation or old masonry
The kitchen and the bathroom are common places with problems of condensation. The steam that comes from cooking and the hot water from the shower charges the room with humidity. When we do not relieve the air of that moisture quickly, a wet layer appears on the wall and mold can form.
A wet basement usually has a very different cause. A sign that moisture is entering the masonry through the ground are chipped. Another possible cause is that there is a leaking pipe. And if wet spots appear in the living space above the basement, the humidity in the basement may also be rising due to the capillarity of the material.
That is why it is important to carefully analyze the damage before starting to clean up the moisture.
One of the reasons why our sanitation are so effective and keep the building permanently dry is because we continually train our employees in the technique of analyzing the damage and its causes. A professional analysis is the foundation of good planning and a successful sanitation of moisture.
- Humidity ascending by capillarity
Capillary moisture comes from porous construction materials that absorb moisture. Moisture rises through the pores of the building material in contact and also works against gravity. This type of moisture can extend both vertically and horizontally.
The correct procedure for the wicking of moisture by capillarity is the Horizontal Barrier.
- Moisture by lateral filtration
It may be that moisture enters laterally in the masonry through the ground by soil water, water going down an incline, infiltration water that is accumulating or groundwater.
There are three types of exposure to water that can affect the part of the building that is in direct contact with the ground:
soil water (capillary water, adhesive water) and infiltration water (not accumulating)
infiltration water that is accumulating water that exerts pressure
To treat a lateral infiltration of moisture we use the Exterior Waterproofing or the Interior Waterproofing.
- Hygroscopic humidity
The hygroscopic humidity is formed by the property of the salts to absorb atmospheric humidity. That’s why the salts in the masonry – especially the sulphates, chlorides and nitrates – can lead to the soaking of the masonry.
The best measure to treat hygroscopic humidity is the Revoke of Sanitation. Before using the sanitary plaster it is essential to cut the water inlet to the masonry (for example with the Horizontal Barrier, the Interior Waterproofing or the Exterior Waterproofing).
The precondition for the appearance of condensation is a temperature difference.
If, for example, the ambient temperature is at 20 degrees with a relative atmospheric humidity of 50% and the air passes over a wall with an interior surface of only 10 degrees, that is where the air cools. As a result, the relative humidity of the environment increases near the surface, because cold air absorbs less vapor than hot air.
So that moisture can no longer condense on the wall, it must be isolated. For this we use our Thermal Plate or our Interior Insulation. If mold contamination already exists, it must be removed in advance with specific measures (elimination of mold damage).
- Exposure to oblique rain
Oblique rain can affect the building’s layer, if the protection against humidity or the moisture balance of the facade is not good.
In principle, the facade system must be capable of emitting more moisture through diffusion during the dry period that it absorbs during rain. A good facade also prevents water from getting inside the outer walls.
- Water faults
The water faults come from unique events, in which a lot of water enters the masonry in a relatively short time.
That can happen, for example, in the case of a faulty water pipe or a flood.