Außendrain

Außendrain, also known as external drainage, refers to a system designed to manage and divert excess water away from building foundations and surrounding areas. This type of drainage is typically installed around the perimeter of a structure's foundation, either during construction or as a retrofit. Its primary purpose is to prevent the build-up of hydrostatic pressure, which can lead to water damage, structural instability, and moisture-related issues like mold and mildew.

The installation of an Außendrain system usually involves excavating a trench around the foundation. A perforated pipe, often made of PVC or corrugated plastic, is laid at the bottom of the trench, typically on a bed of gravel. This pipe is sloped to allow water to flow by gravity away from the building. The trench is then backfilled with more gravel and often a layer of filter fabric to prevent soil from clogging the pipe. In some cases, a sump pit may be incorporated to collect the drained water, from which it can be pumped away from the property if gravity drainage is not feasible.

Außendrain systems are crucial for protecting basements and crawl spaces from water intrusion. By effectively removing groundwater, they help maintain a dry and healthy environment within a building. The long-term benefits include extending the lifespan of the foundation and preventing costly repairs associated with water damage. Regular inspection and maintenance can ensure the continued effectiveness of the drainage system.