In the case of a floor this could cause both layers of tiles to lift up.
Tiling on top of old wall tiles.
The existing tiles must be soundly bonded to the walls.
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No matter whether you are tiling over tiles on a floor or a wall your new tiles will need a stable base.
Make sure the old tiles are well fixed.
Tiling over ceramic tiles how to lay tiles on top of existing wall and floor tiles.
Epoxy tile adhesive bonds with existing tiles making it one of the best options for tiling over an existing tiled wall.
This assumes that the floor underneath is solid concrete and that there are no cracks in the existing tile indicating underlying problems in the concrete.
Tiling on top of old tiles means that any problems with the originals such as becoming loose will still be an issue with the new layer while the extra thickness can also make it more difficult to accurately install fixtures and fittings.
People worry about removing plaster from the wall when stripping old tiles but re skimming the plaster.
Tiling over an uneven surface will give you less than stellar results so level out any globs of dried grout with a sander and secure loose tiles with fresh tile adhesive before beginning the project.
The scrapes you create in the old tile glaze make it easier for the thinset to stick.
This technique works well in backsplash areas because the new thickness of the.
If your old ceramic tile is worn or dated you can lay new tile right over the old and avoid the huge job of tearing out the old tile.
If it sounds very hollow then they are likely not well bonded.
If the ceramic tiles are well bonded to the wall it is possible to install new tiles right on top of the old ones.
This allows for a better bond between the new and old tiles.
It s also a good idea to go over the existing tile with a belt or orbital sander outfitted with 80 grit sandpaper to scuff up the surfaces.
Obviously no matter how well fixed the new tiles are if the old tiles de bond from the wall and fall off then so will the new ones.
If the old tiles are in bad shape the new tiles won t adhere correctly.
You will learn how to stagger the joints of the new tiles over the old how to clean down existing tiled walls.
In fact pros do it all the time.
How to tile over ceramic tiles and lay new tiles onto already tiled walls without needing to remove all of the exiting tiles.
One way to check is to gently tap them.