Tiling over tiles

[cyclonebri1]

Ok, haven't done a search and I know a similar query will have been posted but can someone advise the best adhesive to use for tiling over glazed tiles with marble tiles on a bathroom wall.
I rendered the "new" wall with sand cement in prep for tiling 15 years ago. All the surface is sound and very flat, for once I made a decent job of the wall and tiling.

Any advice welcomed, cheers

 

[pete f]

its best to remove existing tiles and re prepare the walls first

 

[Deleted member 9966]

marble tiles are too heavy to tile on tile. as Pete f says above, remove the existing and start afresh.

 

[White Room]

Marble on existing tiles may be pushing it a bit.

 

[cyclonebri1]

Well I did think I might be pushing a bit with marble, so point acepted. But the wall is so flat that I'm not going to remove the existing tiles.

So, if I go with a reasonable weight ceramic or even porcelain tile, what's the advice on adhesive??

 

[Perry]

None what adhesive did you use 15years ago

 

[robbbin]

Prime the walls first then use a good flexible power adhesive not rapid and dont make addy to stiff that will be fine......

 

[Perry]

Prime the walls first then use a good flexible power adhesive not rapid and dont make addy to stiff that will be fine......

And what were the original tiles put on with ?

 

[cyclonebri1]

:lol::lol::lol::lol: Well, the tiles were "glued" in place with an industrial epoxy, perks of the then job. Believe me this will not come off without the render, hence my reluctance to attempt to remove it :lol:

Yes I was a little industrial in my doings back then, but when it's free

Normally I would automatically remove the old tiles and steam or even replaster, but in this case it would be more trouble than it's worth.

 

[Del W]

What size and thickness of tile is on the wall now?

 

[cyclonebri1]

13 x 8 approx, abount 7 mm if I recall

The plot thickens however and swmbo has decreed a new bathroom suite is required:mad2::mad2::mad2::mad2:, if that is the case then I will strip the lot, which I know is the correct way, but........................

So further to that B&Q have some porcelain mottled marble like tiles on offer. 600 x 600 x 10. Windsor is the range. They don't appear online but they have thewm at our local store.

Now I know B&Q aren't flavour of the month here but has anyone used these?, at £13.98 they appear to be a real bargain. Add to that the wife works for them and on certain days, next Friday being one, she gets 30% discountrrr:

 

[Deleted member 9966]

the only thing I'll say about B&Q tiles (I've used mostly these in my own house cos I like the prices) the sizings leave a lot to be desired. even in the same batches/boxes, some thicker/thinner than others and some not true square. you get what you pay for.

 

[AustinTiler]

I would grind the glaze off old tile first before doing anything; prime it; then lay with flexible glue

 

[cyclonebri1]

I would grind the glaze off old tile first before doing anything; prime it; then lay with flexible glue

same thought had crossed my mind but the mess would br greater than removing them. Anyway thanks but irrelevant know, they're coming off.

 

[cyclonebri1]

Ok, things have moved on but I'll continue in this thread.
I now have the porcelain 60cm x 60cm x 10mm tiles.
Given that I'm likely to have no option but to take this wall back down to the blockwork, what's the recomendation given that I have the tiles to hand. IE, rerender in sand cement, plaster and skim or is it possible to tile direct to the blockwork with some form of thickbed adhesive?

The wall is 100% true to within a couple of mms, the blocks probably being more flat than the existing render.

Best advice and adhesive recomendations anyone.