![]() The weakest points of a house are the ceilings, together with damp rooms like the kitchen and the bathroom. In this case, it is important to seal the gaps and seams with a special vapour barrier tape to make sure that vapour still cannot get through. The only exception to this is insulation which is already provided with a vapour resistant layer. When you are insulating the house on the inside, a vapour barrier is always required. This barrier must be applied onto the inner side of the heated zone, in order to prevent damp air from penetrating the insulation. In order to avoid problems like these, the installation of a vapour barrier is crucial. Over time, this may start to cause damage such as rotting, stains and a deteriorated insulation value. If the water vapour can penetrate the insulation, condensation will appear in the insulation material. Cool surfaces like cold walls, the roof, windows, doors and domes will cool down fastest. The air will contain too much vapour when the temperature drops, which is emitted in the shape of water. When the maximum amount is reached, the air is saturated. The higher the air temperature, the more water that can be taken. In the form of vapour, air always contains a certain amount of water. Without a vapour barrier, moulds would occur and the insulation value would decrease. In this way, the damp indoor air won’t penetrate the isolation. By covering the insulation with a vapour barrier sheet, everything will be sealed airtight. Apart from choosing the right insulation material with the appropriate thickness, a correct installation highly influences the quality and insulation value as well.
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