Can the panelling be installed over existing tiles?

Yes. Providing the existing tiles are securely fixed and the extra thickness of the waterproof wall panelling does not interfere with the operation of existing fixtures such as bath taps, shower mixer valves, doors and architraves. Some older bathrooms have walls that are half tiled, and have been stuck on using cement. These bathroom tiles are very difficult to remove, so providing the extra thickness is not a problem, the top half of the room can be battened out level with the tiles, and the wall panelling can be stuck to the tiles and stapled to the battens.