Projects
Underground parking garage Frankfurt

11,000 m2 of jointless waterproofing in the 5th basement floor

For years, the operators of the underground car park had to contend with a leaking floor slab. The 2.30 m thick reinforced concrete slab is unable to keep out the pressing groundwater, causing numerous puddles to form in the lowest parking level on the 5th basement floor. All previous attempts to repair the leaks locally failed or only provided a temporary solution.

To finally put a stop to the problem, the entire level (approx. 11,000 m2) was upgraded with the DUCON40 system. With a seamless layer just 40 mm thick, DUCON seals the underground parking garage against the groundwater and does what the existing floor slab is unable to do.

In order to test the functionality of the solution in advance, a test area of approx. 100 m2 with an identical structure had already been constructed two years previously. DUCON was once again able to demonstrate its capabilities in the renovated area, so that the contract for the entire project was awarded.

The construction site logistics posed a particular challenge. All machines and materials had to be transported from the delivery zone on the first basement floor, with a ceiling height of just over two meters, down four more floors. The same applied to the high-strength mortar of the DUCON system. The fresh concrete delivered by truck mixers was pumped from street level to the lowest parking level via hoses up to 300 m long.