Non-destructive measurements on the surface of an underground car park ceiling in Hamburg, Germany.
Description: Water came in through the ceiling of the underground car park since the beginning of the construction but no one could find the leakage. We carried out the measurements with the EFT-Technology upon the ceiling of the underground car park in an area of approx. 1400 m². We found one big leakage at the corner of the building. Thus, the leakage could be repaired.