It could even lead to mould growth.
Tiling over existing tiles in shower.
Normal tile trim is ideal for hiding the cut or unsightly edges of tiles.
If the tiled area is 95 free from hollow sounds it is good for tiling over.
Or larger and even more important when you re tiling over tile.
And it lasts for 20 years.
If your old tiles are loose drummy lifting too uneven or badly damaged they are better off removed.
When there is a double thickness of tile it is much harder to disguise.
Tiling on tiles like this will not improve the problems.
When this occurs moisture will continue to build up threatening the plaster and dry lining which lies behind the tile.
While tiling on tile is a great solution for outdated tiles it s no solution for an existing tile job with issues.
Tiling over tiles can make it awkward i e.
Tile on tile or as i say it.
At diy doctor we use double glazing plastic trim to hide these edges.
Moisture and steam from your shower can easily creep behind these tiles.
Others prefer to use a larger notched trowel 1 2 x 1 2 in to apply the thin set.
Some installers prefer to flatback each tile with the flat edge of the trowel before applying the tile to the combed thin set.
Don t worry if you do pull a bit of plaster when stripping the tiles as it s easy enough to replace.
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Layer newspaper on the floor across the bottom of the tiled wall.
Extra thickness when tiling around shower fittings.
Mix degreasing cleaner with water in a bucket using a dilution recommended by the cleaner manufacturer.
Damaged tiles or tiles that are literally lifting off your floors or walls provide the perfect entry for water.
Before you begin tiling over tile conduct a thorough assessment of the base layer to pinpoint any surface irregularities which can cause foundational problems down the road.
Then rinse the wall with a water dampened.
If the tiled area has drummy tiles they have to be pulled out and replaced before the tiling over work starts.
The best way to check the tiles for drumminess is to tap each one with the back of a screwdriver and listen for a hollow sound.
Scrub the wall tiles with diluted degreasing cleaner and a nylon scrub brush.