On the walls, floors and ceilings that are moist for a longer period, mould can occur. Mould is very obvious and looks horrible, but it’s also unhealthy. Spores of the fungi get in the air and are inhaled. This may increase respiratory problems such as asthma or chronic bronchitis. Pests such as isopods, silver chaff or dust mites, which cause allergic reactions, also thrive in a moist environment. Moisture problems can be overcome by addressing the cause.Damp spots can occur for various reasons, such as:
A leakage is usually caused by a blocked drain. In this case it’s the responsibility of the tenant to remedy the cause. Make sure you solve this the right away, before permanent damage occurs to plaster in walls or ceilings. In the event of bad weather in combination with very heavy rainfall damage can occur to roof or sealants and masonry on the façade, which then causes leakage.
Every night an average person produces about half a litre of most while sleeping. If you’re at home all day in a small (living) room this is even more. It is important to ventilate the house properly to prevent the moist from getting in the walls.
Cold surfaces in the façade can be caused by lacking insulation. They mainly occur with connection to the exterior façade, balconies and galleries as it directly connects with the floor of the room. This is called a ‘thermal bridge’. Thermal bridges can be overcome by covering them on the outside with insulating material.
In the Netherlands most crawl spaces and basements are moist, especially in places with high groundwater levels or after heavy rainfall. When a house is tightly insulated and there is suction of air by means of mechanical ventilation, through slits in the floor air from the crawl space can enter the living area. Air from crawl spaces it not just moist, but also contains random which is harmful to your health. In new houses the floor must be tightly sealed, but in older houses this is not the case. Then make sure enough air the living area enters through vents.