Enforcing the foundations by jet grouting; replacing the existing wooden piles with jet piles.
The block of flats built in the 1870s had sunk for decades because of the decaying of the wood. Before the project started the sinking had quickened to 5 mm per year. The work was started by enforcing the stone structures by grouting followed by the creation of 122 jet piles. After the enforcing was finished the interiors were restored and the underground drains and the floors were rebuilt and the surfaces were painted.