Mold  are invisible to eye & are found in nature. 

They can grow all over the house. Some signs of Mold or excess moisture:

The presence of spots of different Colors, but most often green or black:

+ on walls, ceilings or carpets,

+ around windows,

+ in cupboards, etc .;


the presence of a characteristic aromatic smell;

Dark circles, warping, chipping, or other signs of water leakage on walls or ceilings, which could indicate a problem hidden behind the material.

Indeed, when mold is visible or there are signs of its presence, it is necessary to conduct a thorough home inspection to find out the cause and take appropriate measures to correct the situation. To learn how to clean a mold-affected surface, see Eliminating mold.


If you are a renter or landlord and notice mold in the dwelling, consult the Help and Resources department.

++Tips for detecting possible causes

Inspect the house from the outside at least once a year to make sure everything is in order:






seal joints

exchange, etc.


Carry out regular housekeeping in the house as well as a complete inspection of all rooms at least once a year. This makes it possible to detect traces of water leakage and mold:


behind the furniture

In the cellar, etc.

Avoid mold growth

Act quickly in case of water damage

The presence of standing water, seepage, or water-soaked material aids the development of molds.

Thoroughly cleaning & dried any water damage with 24 to 48 h . After this periode, molds can develop.

Get rid of porous materials that are severely damaged by water such as:

gypsum board


Cardboard tiles



Upholstered or upholstered furniture, etc.

The presence condensation on windows OR walls may indicate that ambient humidity is high. To avoid in-creased indoor humidity:

Minimize showering for long periods of time.

Turn on the fans when showering, bathing and cooking food.

Make sure the dryer hose is securely connected to the external outlet.

Empty and clean the dehumidifier tank regularly. In the summer, it is generally recommended to install it in the basement. 

Make sure the air humidity in the home is low enough to prevent condensation (usually between 30% and 55%). Devices that measure humidity in the home (hygrometer), are available cheaply at most hardware stores.

adequate ventilation

Open the windows if necessary to ventilate the house.

Ensure that the air exchanger or other ventilation system is used correctly and follow the maintenance instructions.

Elimination of mold

It is important to identify and correct any cause of a water buildup or leak such as a broken pipe, overflow, or sewage support.