tile over tile?

[Mr_Grout]

Hi all,

first of all I love this site

I know this subject has been done to death but here's one more.....

I'm retiling my front entryway. The tile is in excellent condition and I really don't want to jackhammer it out. If I use a membrane (Ditra?) over the old tile and then place my new tile on top of that would that be suitable? Also does slate make a good entryway tile? What should I look for if I want to get multicolored slate? Last question: In my previous tiling jobs my grout discolored, if I use a sealant will that keep the color?

Thanks for your help

[jase in England]

If the tiles that are in place are sound in strength and the sub floor is sound why not tile straight onto tile using a latex modified thin set.

Might get some different responses to this but this is what we would do in the UK.

Jase

[Arn]

Grout:

I'm with Jase on that one if the tile is in perfect condition. You could add an anti-fracture layer if you wanted to, but I'd just use the toughest thinset you can get your hands on.
~ could even burn the surface of the existing tile with a thin layer of thinset, let it dry. That will give really good bite when you set.

Best of luck!

[Bill Vincent]

Originally Posted by Arn

Grout:
... but I'd just use the toughest thinset you can get your hands on.

That being an UNmodified thinset mixed with a liquid latex additive. For even more bite, you might take a sander and rough up the surface of the existing tile.