In most cases you can if the existing tiles are sound and the substrate they are fixed to is sound. However, using the correct adhesive to achieve this is very important. Installing tiles on top of existing tiles does have it’s issues though. You will need to ensure things like doors are still able to open. Plumbing and drainage may need to be altered and light switches may need to be refitted. With this in mind, where possible, it is better to remove old tiles and tile directly on to the substrate.
For further advice on tiling over old tiles speak to our friendly Customer Service Team on 01473 805959 or livechat and they will be able to advise you further.