Bituminous sheets are primarily used for waterproofing of buildings. Waterproofing is a functional layer, a continuous watertight joint, which prevents the passage of water or moisture into the supporting structure. For this reason, it is located on the exterior of the structure, where the building is in contact with the terrain (moisture and water from soil) and where the exterior vertical surfaces of the building are exposed to weather, such as parking lots, balconies, loggias, terraces and flat roofs.
The task of waterproofing is to ensure dry construction and thus to provide favorable conditions in indoor rooms for different purposes, such as storage, production, trade, business and housing.