A little humidity but not too much. This is what is needed in housing to be healthy. But how do you spot the first signs of excessive humidity and how do you fix it?
The humidity makes you shiver
The ideal humidity level for a healthy home is between 45 and 65%. Beyond this, the accommodation is qualified as "humid" and the temperature felt is 4 ° lower than the actual temperature. This can be a first sign not to be overlooked.
Condensation and foams
If there is frequent fogging on your windows, or if you have double glazing and there is condensation on the walls or on the tiles, your house is too humid. Likewise, if mosses or saltpetre develop in the house. There is also a fungus, the merule, which attacks the wood when the humidity is really excessive. And quite simply, if you find that your interior smells musty, it is time to react.
Causes of humidity
Most often, the dwellings are damp because they are poorly ventilated or over-insulated and too poorly ventilated. Indoor air charged with water vapor cannot escape. More serious, the humidity due to capillary risings by the walls or the ground (the humidity appears first at the bottom of the walls). This problem may be related to waterlogged land, a house located in a bowl or on a slope, or poor quality construction. Such a problem can be treated without heavy work. In any case, if the humidity becomes really annoying, call a professional who will establish a reliable diagnosis and advise you on the best treatment.
A solution for each case of humidity
In a poorly ventilated dwelling: normally, it is enough to install a VMC. For a more efficient installation, a double-flow VMC can be installed, which will filter the incoming air and use the calories from the exhaust air to preheat the house. We can also consider a Canadian well, but the work is then much heavier and therefore expensive. At the same time, anti-humidity paint can help solve the problem. In the case of infiltration: the work is more complex and expensive. Foundations can be dug up and protected, laying drains in the ground or, better still, injecting resin into the walls to create a waterproof barrier. Another solution is to install specific water repellents, paints and coatings.
Call a professional
In all cases, call a professional. Take several opinions and make several quotes. And watch out for cheap solutions, which could only push the problem away.