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On the old tiles of our house was placed another tiling of poor quality! What can be done to change all this? A third layer seems inadequate and we would not want the solution to come back to us with the eyes of the head!

The ideal solution would be to remove existing tiles and start on a good foundation. For this, once the slab is exposed, proceed if necessary to a patch and install a tile to your liking. Another solution is to prepare your old tiling (plugging holes, repair damaged joints) and apply a patching compound that you can then cover with a thin vinyl coating to modernize your floor. Obviously, avoid a third layer of tiles...

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