The scrapes you create in the old tile glaze make it easier for the thinset to stick.
Tiling on top of old wall tiles.
Tile on tile or as i say it.
This allows for a better bond between the new and old tiles.
And it lasts for 20 years.
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.
In the case of a floor this could cause both layers of tiles to lift up.
People worry about removing plaster from the wall when stripping old tiles but re skimming the plaster.
If it sounds very hollow then they are likely not well bonded.
Make sure the old tiles are well fixed.
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.
Tiling over ceramic tiles how to lay tiles on top of existing wall and floor tiles.
How to tile over ceramic tiles and lay new tiles onto already tiled walls without needing to remove all of the exiting tiles.
You will learn how to stagger the joints of the new tiles over the old how to clean down existing tiled walls.
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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.
One way to check is to gently tap them.
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.
If the old tiles are in bad shape the new tiles won t adhere correctly.
If the ceramic tiles are well bonded to the wall it is possible to install new tiles right on top of the old ones.
In fact pros do it all the time.
The existing tiles must be soundly bonded to the walls.
This technique works well in backsplash areas because the new thickness of the.
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.