The tile covering and the staircase of this high schools’ central Hall urgently needed a restoration in accordance with the preservation order. In order to repair the staircase and the slab flooring of the hall, the block steps and the natural stone slabs had been picked up and stored at the sides. Subsequently, the construction management and the other parties involved decided which slabs can be retained and which needed to be replaced. Plates and steps to be reused had been carefully cleaned and reconditioned.