There are various types of moulds. Mould in a house generally involves Stachybotrys (black mould), Alternaria, Aspergillus and, Cladosporium. The colour of mould in a house differs, but usually, it is white or black mould. The spores of mould can be created by damp problems in a house, but they can also enter through a window, door, or air grill. The mould usually stays behind on walls and/or ceilings, which produces white or black mould. Dead mould also still contains substances that are harmful to human health. Removing mould as quickly as possible is important.

Mould in the home can be formed in various rooms or surfaces. The 3 most common problems with mould in a home: 

1. Mould in the bathroom
   Mould in the bathroom is a common occurrence. Warm water vapour produced by showering or a bath produces condensation. This happens at the time that water vapour cannot be discharged adequately. It condensates on walls, the ceiling or windows. The surface of walls or the ceiling is rough, and that means they absorb damp easily. A mouldy wall or ceiling is a common problem in the bathroom. 
2. Mould in the bedroom
   Not just in the bathroom, but mould can also occur in the bedroom. Mould develops in damp and warm rooms. If a bedroom is not ventilated properly, mould quickly forms because the damp cannot leave the room easily. In the bedroom, mould can spread with spores that float in the air. These spores end up on walls and windows, which causes mould. If you have mould on the wall, it is important to strip the wallpaper first.   
3. Mould in the cellar
   A cellar is also an ideal room for mould. A cellar often does not have a window, which means there is insufficient ventilation. Cardboard boxes, wood and fabrics are ideal nutrients for mould in a cellar. Mould in a cellar is bad for your health and that makes the room unusable. 
   
   Mould in the house is bad for your health. It does not make a difference whether it concerns mould in the bathroom, bedroom, cellar or any other room. Removing mould is important, but dealing with the causes of mould is just as important.

The cause of mould in the bathroom, bedroom or another place in the house is a surplus of humidity. Mould can only develop in damp conditions. Mould comes from damp issues. So apart from removing the mould, you also need to deal with the damp issue. These are the 3 most common damp issues:

1. Penetrating damp
   Problems with the humidity of the facade can result in penetrating damp. Humidity of a facade that does not dry out properly can penetrate to the internal walls. The result is often damp walls, where mould can form. Penetrating damp is often a problem in houses with cracks or damaged joints. Besides removing mould from the damp internal wall, you can impregnate the facade. Impregnation prevents penetrating damp in the facade. 
2. Condensation
   When warm air cools down, condensation is formed. The warm air condensates on walls, the ceiling, or the windows. If the warm air is not discharged properly, the condensation has the chance to develop further into mould on the ceiling or the wall. Condensation can arise due to showering, bathing, drying clothing, or hot steam during cooking. 
3. Rising damp
   In older houses there is often rising damp. This is due to a damp seal that does not work properly, which means humidity from the soil rises into the walls via the foundation. It means that walls can become extremely damp in some places. The humidity from the soil contains bacteria and salts, which means you can end up with mould, and  efflorescence on the walls. Efflorescence is a white deposit that is particularly visible on brick walls. 

Black mould is caused by damp conditions. This may have various causes, including rising damp, penetrating damp, condensation or a leak.

As with other types of moulds, regular ventilation of the rooms in the house is important to prevent black mould. Another solution is to use our HG mould preventor. In any case pay particular attention to wet rooms, such as the bathroom.