Tiling over tiles?

In general, it is not advisable to tile over existing tiles. The reason for this is that it can create additional weight and stress on the structure of the floor or wall, which can lead to cracking or shifting over time. Additionally, the new layer of tiles may not adhere properly to the existing tiles, which can result in a weaker and less durable installation.

If you are considering tiling over existing tiles, it is important to assess the condition of the existing tiles and the surface they are adhered to. If the existing tiles are in good condition and firmly attached to the surface, and if the additional weight of the new tiles is not a concern, then it may be possible to tile over them. However, it is generally recommended to remove the existing tiles and properly prepare the surface before installing new tiles for the best results.