Tiling onto tiles should I prime?

[Craftycocknet]

Hi all.

There is a job coming which requires tiling directly onto an allready tiled wall.

The existing tiles are of sound condition no breaks or loose etc, in fact there solid on. They are onto concrete. They are glazed but I was going to score and take the glaze off best as possible.

Its one wall, . What would be the best adhesive? A flexible one? And should I prime first...?

Thanks for any input.

 

[Old Mod]

If you are going to tile on to tile, make sure they're degreased thoroughly and then you can prime with TM's prime and grip or Mapei's eco prime.
An S1 adhesive will be fine.

 

[Craftycocknet]

Thanks. So definitely not a more flexible adhesive s2 or is that an just unnecessary overkill?

 

[Old Mod]

Thanks. So definitely not a more flexible adhesive s2 or is that an just unnecessary overkill?

You can use an S2 if you're more comfortable with it.

 

[Craftycocknet]

Thanks

But I still need to score every tile several times beforehand even when using the eco grip primer?

 

[Old Mod]

Thanks

But I still need to score every tile several times beforehand even when using the eco grip primer?

You could spin the shine off with a grinder and sait carborundum pad.

 

[Time's Ran Out]

Make sure you allow the primer to fully dry and once new tiles are fixed give extra drying time before grouting.
What size are the old tiles and the new ones to be fixed?

 

[WetSaw]

I use a C2 adhesive.