Mosaic tiles lifting in wetroom - TilersForums.com

[Fizzylogic87]

So we had our bathroom replaced with a wetroom around 6 years ago and where the water hits the floor and where you stand, all the little mosaic tiles started to lift. This was around 2 years ago. We have reapplied adhesive a few times but it just keeps happening, so resorted to pulling them up around the drain, and now it's unusable.

Why would the tiles lift in the first place? And how do we stop this happening again?
We are thinking of replacing the tiny square mosaic tiles with larger ones in the hope they won't lift again? However, we can only find tiles that are thicker so this isn't helping as the water is then higher than the surrounding mosaic tiles...

Any advice would be greatly appreciated.

I don't know the make of it, as we trusted the installer with all the purchasing etc

 

[Dave]

Hiya.

what type of wet tray is it.

 

[Fizzylogic87]

Hiya.

what type of wet tray is it.

In all honesty, we haven't a clue- we literally put all of our trust in the installer. We said we wanted a wetroom and he provided it. The guy that installed it was a subcontractor for Wickes, so perhaps something they sell? It's also got underfloor heating, but that probably won't help. Sorry!

It's only a very small bathroom and we only replaced our kitchen 18 months ago (directly below bathroom) due to a broken pipe causing a flood, so worried as we don't want another major leak.

 

[Dave]

What size mosaics are they and can you post a pic.

 

[Steve6690]

Lots of things it could be unfortunately. Some foam-type boards and trays have a minimum tile size because of point loading. I'd start with that tbh. It would mean lifting the mosaics though.

 

[Dave]

Lots of things it could be unfortunately. Some foam-type boards and trays have a minimum tile size because of point loading. I'd start with that tbh. It would mean lifting the mosaics though.

My thoughts as well steve.

 

[Fizzylogic87]

Lots of things it could be unfortunately. Some foam-type boards and trays have a minimum tile size because of point loading. I'd start with that tbh. It would mean lifting the mosaics though.

Thanks, my partner's dad has lifted a large amount of them up around the grid and has removed the old grout. The new larger tiles are now not sticking up above the rest of the bathroom. Hopefully it works otherwise we'll have to get someone out to redo the whole thing?!

Tiles only lifted where water was hitting them/where you stand in the shower- rest of bathroom we had no issues.

 

[Steve6690]

If it's a foam tray though, it could be damaged through compression. It's worth having a look at it before re-tiling

 

[Fizzylogic87]

If it's a foam tray though, it could be damaged through compression. It's worth having a look at it before re-tiling

That's a picture of it currently if that's any use?

 

[Perfect Tiling]

Its hard to see what type of tray has been used as what you can see here is a homelux decoupling mat that has been stuck to the tray as part of the waterproof tanking. The fact that you can still see the writing shows that the adhesive wasn't stuck that well to the mat. If the mat is undamaged and still stuck to the tray it may be OK.....you can't see if its been damaged...but then again you can't see if it hasn't been. I'd isolate your UFH though....don't use it without tile coverage.....the installer hasn't been keeping it evenly spaced. I don't put it into the shower itself....by the time you go into it the warm water has warmed the tiles and the extra heat can dry out the water trap leading to smells from draughts back up the waste.