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.
Tiling over old tiles.
While tiling on tile is a great solution for outdated tiles it s no solution for an existing tile job with issues.
You can tile directly over asbestos with new tile including ceramic tile.
Tiling on tiles like this will not improve the problems.
Instead of removing the old tiles you can often update them by tiling over tiles.
One advantage of doing this is that it is time saving.
Next you must clean down the old tiles.
This essentially means laying a new layer of tiles over the old layer.
The scrapes you create in the old tile glaze make it easier for the thinset to stick.
Tile on tile or as i say it.
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.
This is best done with some white spirit on a rag.
Colorful tiles may go out of style and some tiles are inappropriate for the space.
No matter why you want another look you can tile over existing tiles if the wall is sturdy and none of the old.
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.
You do not have to allot work hours to pull up the existing tiles which means the tiling work can be finished much faster and all without the big mess.
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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.
It is not uncommon for paint to be splashed onto bathroom and kitchen wall tiles and this needs to come off too.
Tiling over tile is usually a much easier and cheaper solution than pulling up your original tiles and re tiling your floor or wall.
Use a portland cement based adhesive to adhere the new tiles to the old.
This allows for a better bond between the new and old tiles.
But this isn t always the case.
Take care to choose a tile whose thickness is not going to create a problem and choose a tile that is rated for floor use.
Bathroom tiles get greasy as a result of the soap suds shampoo and shower gel.
If your old tiles are loose drummy lifting too uneven or badly damaged they are better off removed.