Tile on tile - Tile Advice

[Stevea69]

I have 1 wall at the side of the shower and it already has tiles on, what adhesive should I use for 600x300 replacement tiles?
Thanks
Steve

 

[Boggs]

The only adhesive you should use would be a cement based powdered adhesive.

I would not recommend tiling over existing though, remember your new tiles will only be fixed to the substrate as well as your old tiles are.

But if you have no choice I would do the following using the products I would use.

Ensure existing tiles are well fixed.
Clean tiles really well, removing all soap residues and any old sealers.
Prime the tiles with Tilemaster Prime Grip.
Tile with Tilemaster Standard Setaflex.

Hope this helps

 

[Time's Ran Out]

Nah!
I wouldn’t tile 600x300 on top of anything other than a prepared Wedi/jackoboard substrate.
Substrate could be emulsion painted plasterboard - not worth the risk!

 

[Dan]

Can you pull a few tiles off to see what it is they're stuck to? Seems a bit of a shame to stick fresh on and then one day they all come off.

 

[Brian the Tile]

Check the tiles to be tiled over are well stuck or take them off ,if solid a good well known powder adhesive

 

[Dave]

Nope , take them off all day long , also think of the weight your adding to existing substrate