Tile on Tile

[Time's Ran Out]

The main issue with tiling on tiles is the additional weight your adding to the weight already being adhered to the substrate - it's recommended 22kg per metre for skimmed plaster board. So without removing the 'well fixed' original tiles you won't know if the original substrate was covered with wallpaper, emulsion, paint, unprimed plaster skim or unplastered board! May not cause a problem for a splashback, but 2.4 mts up a bath wall could be deemed irresponsible .
10 years old this bump!

 

[Flintstone]

I don't do it on walls under most circumstances. Only last year I went to do a job blind for some one and when I got there the tiles that I was asked to tile over with large porcelain were stuck onto old wallpaper, I let some other 'tiler' do that job

 

[Terry the tiler]

Don't need to score the tiles, use Feb mix blue grit pva, or bostick do a green grit pva. This will give you a key and works a treat. Sorry if this has already been said, I didn't read all the comments.
Make sure the existing tiles are solid tho.
And I would use bal white star.

 

[Flintstone]

You can't stick tile on tile with bal white star my friend

 

[AndY mac]

OMG I'm in bits reading this.

 

[Time's Ran Out]

The adhesive choice should be made on the type of tile to be fixed to this 'well fixed' tiled substrate.
A tubbed adhesive has a maximum tile size of 300x300mm and if it's porcelain you may find a tubbed adhesive will never fully cure without airflow.

 

[LM]

Don't need to score the tiles, use Feb mix blue grit pva, or bostick do a green grit pva. This will give you a key and works a treat. Sorry if this has already been said, I didn't read all the comments.
Make sure the existing tiles are solid tho.
And I would use bal white star.

Are sure you meant to say PVA or do you mean blue/green grit arcrylic primer?

 

[Rich Midge]

3 parts pva, 1 part water and a good sticky adhesive and don't worry about drying times.
Brilliant.

 

[LM]

3 parts pva, 1 part water and a good sticky adhesive and don't worry about drying times.
Brilliant.

You can't use PVA when tiling mate 🙂

 

[LM]

This is what you want