Drainage (also drainage / drainage) are measures and systems that capture water on and around buildings and drain it away in a targeted manner. They are available in the form of drainage mats, pipes and entire systems.
Drainage Drainage consists of vertical drainage in the wall area, horizontal drainage in the foundation area and surface drainage below the base slab. A drainage must be established as a closed ring line. It should have a minimum gradient of 0.5%. The pipe must be designed to be controllable and flushable. Control shafts must be installed every 50m.
Vertical drainage layers lie in front of the waterproofing and drain water into a gravel layer without backflow. Nonwovens act as filters and prevent fine particles from the soil from penetrating into the drainage layer. This creates filter stability. Surface drainage consists of filter-stable geotextiles and a capillary-breaking gravel layer with a grain size of 8/16.
Walls and floor slabs exposed to strata water and stagnant seepage water must be protected with a drainage system in accordance with DIN 4095.
For buildings with a floor area of more than 200m², additional drainage pipes are required, which must be connected to the ring drainage and drained.
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