The innovation:
Radon-tight KNECHT Systemkeller®

Radon is a natural radioactive inert gas created by the spontaneous radioactive decay of uranium. It can occur practically anywhere in the subsurface air in various concentrations.

In Germany the occurrence of radon has been investigated relatively thoroughly. A concentration of 100 Bq/m³ is in some cases exceeded, primarily in uplands such as the Erz mountains, Thuringian Forest, Bavarian Forest, Eifel, Black Forest, Fichtel mountains, the Harz and the foothills of the Alps.

Already in 1993 KNECHT developed radon-tight cellars that prevent radon from entering the building, thus eliminating the risk of radon contamination in the indoor air.

Today continuous, innovative further development guarantees the highest possible level of safety for the customer.

Benefits of the radon-tight cellar:

• No air containing radon in the cellar
• Thus no health risk from radon
• At the same time, the radon-tight foil provides optimal protection against pressing water
• Mould formation is prevented
• No drainage is necessary
• No ongoing costs from complex technical systems
• No additional heating energy requirements from constant air change
• Easier to comply with the German energy conservation regulation of 2001
• Lifelong durability of the radon-tight foil
• The seal is maintenance-free