These treatments consist of the application of waterproofing paint or wax over the wall in which damp and mould spots are visible.
The real damp problem caused by condensation is not the spot, but the excessive humidity in the house's atmosphere. Any intervention done against condensation will be only effective if water vapour production is reduced. Waterproofing paints or waxes disguise the problem, but do to eradicate it.
VENTS AND FANS
These ventilation systems enable to renovate the air at the home and evacuate a part of the humidity outside. However, these solutions are not powerful enough to evacuate all humidity, and moisture remaining in porous elements (mattresses, carpets, curtains...) is not eliminated by these methods and produce condensation permanently. In addition, it represents a continuous heat loss.
The electro osmosis consists of the change of polarity of the constructive component affected by damp. It is carried out by the application of an electric field over the wall in which the problem is present.
Due to electrical balance charge these elements repel each other. In principle, that would happen with water inside the affected component and it would be expulsed due to polar equilibrium.
The truth is the buoyancy of the water is much stronger than it has at the intermolecular level. It is to say, this method is not effective 100% at all.
PLASTERBOARD STUD WALLS
Installing a plasterboard stud wall is just masking the problem.
This wall keeps damp from being visible, but in any case eliminates it. Furthermore, it presents a serious problem because, as the affected area is not visible, it may be producing severe damages on the other side of the wall without we even noticed the existence of this problem.
On the other hand, the problem amplifies as ventilation in this area reduces.
It consists of a way to collect water leaked through internal wall via a drain that drives this water to general household system. Additionally, all the intervention is closed by a wall, usually vented.
This method renders ineffective given that the affected wall continues its exposition to wet soil and external weather conditions, thus deterioration persists. Even well ventilated, cavity walls always have moisture problems due to internal condensation, that may amplify the problem.
It is advisable to ventilate the air in homes, at least, once a day. But it cannot be understood as a solution to condensation problems because to solve them, it would be required to ventilate permanently, even in the night. This is not possible in the cold season. And, in many cases, it wouldn't achieve it even then.
The higher the air temperature, the more humidity it has, but it will always be external cold surfaces in contact (thermal bridging). Heating is expensive and the current trend is to reduce costs in this respect. We remind you that the more humid the air, the more energy you need to heat it and maintain an adequate temperature.
They allow to absorb the humidity excess in limited spaces (wardrobes). Their absorption capacity is too weak to treat effectively an entire room. In the long term, this practice is very expensive and it doesn't reveal much results. These chemicals products must be handled with great care.
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