Securing your indoor climate
The main reason for problems with moisture in buildings is vapour that comes from the indoor climate, meaning vapour that forms from the habitat area. Water vapour occurs when warm air with high humidity meets a colder surface, where moisture can form. That is why to secure your indor climate a vapour control layer should be installed, which provides healthier home environment and lower energy costs.
A vapour barrier (vapour control layer) is a vapour tight membrane that is installed on the warm side of the roof or on the exterior house wall. If a vapour control layer is installed in a wall, it must be a light construction, meaning that the inside wall of the house is made from wood, gypsum or similar light weight building materials for walls.