An example of the rehabilitation of one of the rooms of the underground floor of a brick building with concrete basement walls. The waterproofing of the building was long past its useful life, and modifications and repairs had been made in the past that made the whole situation even worse. The basement was damp, the cause of which someone had tried to hide behind drylining, tiling and perpetual dehumidification.
After removing the doors and plastic cladding, the ceramic tiles, floor tiles, and plaster were cut down. During the work it was found that the floor consisted of 2-3 layers of tiles laid on top of each other and that there was a bricked-up window in the room. The walls under the plaster and wall plaster were wet. The back wall with the window was repaired with KÖSTER Repair Mortar and a waterproofing coating of KÖSTER NB1 Grey was applied to the inside along with KÖSTER NB1 Flex.
Subsequently, a full-fill grouting of the perimeter wall was carried out and the masonry partitions were grouted with KÖSTER Crisin Cream as a linear moisture barrier. After all old floor layers were removed, the larger pits were concreted with waterproof concrete or repaired with waterproof repair mortar, the floor was sealed with KÖSTER VAP I 2000 and then a levelling compound was poured to level the floor.
The rear wall was bricked up after grouting, both for the heating ducts and to achieve the original clean appearance. Subsequently, the remedial plaster was made, namely the coarse - KÖSTER Restoration Plaster and the fine - KÖSTER Fine Plaster. The new tiles were laid, the pipes running along the wall were capped with SKD pre-wall and everything was painted with a diffusion-open paint designed for remedial plastering.
Up to a height of approx. 1.5 m, a washable, abrasion-resistant coating was applied, also vapour permeable. Finally, the door, radiator and original wall hangers were refitted.
