For transportation infrastructures such as bridges and tunnels (with open covering) bituminous waterproofing sheets are popular sealing solutions. Even in parking levels and underground car parks protection of buildings against moisture is essential and therefore bitumen waterproofing sheets play a considerable role.
Permanent parking space shortage is very pronounced in urban areas. A parking level is a building fit for traffic (garage, basement garage) and allows space-saving parking of vehicles or other transport above the other in several floors. Therefore, the pavement (asphalt, concrete, etc.) and the seal must be perfectly coordinated.
In navigable areas with adjacent land use, insulation should also be considered.
The demands that are placed on bridge waterproofing with bituminous membranes differ in some respects from those used for roofing. It is essential that the bituminous roofing sheets are connected frictionless with the bridge structure. This is done through a primer (with epoxy resin molding) and a full-faced 1st bitumen waterproofing layer. Also, the asphalt protective layer is homogeneously connected with the bridge sealing.
Highest demands such as an emergency stop of a heavy-truck, generating immense forces - this can be derived only by an appropriate connection of the layers in the structure of the Bridge.
Unlike the traditional tunnel structure where you dig into the mountain, by an open tunnel the building will be only after concreting the frame-shaped structures fully or partially covered.
Due to the known benefits of bitumen waterproofing sheets they are mainly used for this open tunnel structures. The bitumen sheets are characterized by particularly high mechanical strength and material properties – this makes them advantageous also for gallery building structures.