Cracked and debonded floor tiling

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Sico31

New to TilersForums.co.uk
hi

I am new to this forum. Wanted to get some advise if possible.

I had a new tiled floor laid a couple of years ago. The tiles have started to crack soon after completion and are now a complete mess.

The floor build up is a timber hoist floor spaced at 300mm centres with 18mm ply board 10mm marmox Board electric underfloor heating mat. The bit that looks odd to me when lifting the tile there is 40mm of adhesive which is all cracked and loose. Most of the tiles have debonded from the adhesive too.

Seems to me that 40mm of tile adhesive is crazy.

Can anyone give advise on if this is normal and what would be the best way to remedy.

Some photos too

Many thanks

0B745AEF-5E42-4DB4-8521-063A4981650D.jpeg FC4E56D9-ED28-4297-BDB8-AB61C01FF092.jpeg E1C28032-727E-4F54-8356-261151612A83.jpeg
 

impish

Trusted Advisor
Professional Tiler
Very few (if any) tile adhesives are made to go thicker than 25mm.
That's the issue.
To be honest; anyone stupid enough to use that thickness of adhesive has probably done many other things wrong too which may have contributed.
Tiling direct to the mats is one.
I can see the adhesive ribs, so not back-buttering and bedding the tiles properly is another.
A job should last a decent length of time (7 yrs or so) can you get legal with the "tiler"?
 
OP
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Sico31

New to TilersForums.co.uk
Thanks for the quick response.

That is interesting to know. What would you recommend to fix it. The annoying part is the kitchen is fitted on to the tiling and it would need to go back at the same height.

Could you recommend a build up.

The floor was laid a while ago so I doubt it. I will be approaching the builder though who employed the tiler.
 

pdc

Only a Handyman...
Trusted Advisor
Professional Tiler
A bit hard to tell from the photos but it looks like a few different layers, possibly very thick levelling compound rather than adhesive. It's wrong though whatever it is.
 

Ajax123

Tilers Forums Pro - Screed Advisor
Trusted Advisor
Professional Tiler
That's not 40mm adhesive it's a screed. Possibly anhydrite although looks too dark...
 
W

Waluigi

Unregistered (Please Register)
Am I missing something, it’s white Adhesive and a screed. Would’ve taken an age to heat up.
 

Localtiler

Trusted Advisor
Professional Tiler
JOTM Winner
It looks to me like a thick pour of SLC and then adhesive on top with a tiny trowel like a 6mm. I can tell it's got issues with the amount of gaffa tape over the wires. It's probably a catalogue of errors leading to this point.
 
OP
S

Sico31

New to TilersForums.co.uk
Thanks for the reply’s. Would anyone have an ideas remedy?

As I said my kitchen sits on top of this build up so it needs to remain this height but obviously the screed/adhesive needs to come up. Could I ply it out replacing the electric heat mat on the ply and then tile on that?
 
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Waluigi

Unregistered (Please Register)
You have to ask yourself why it’s that deep in the first place. My guess is that thickness is there because it’s a lower point.

I’d get everything up and potentially level the floor up with a self leveller capable of coping with that thickness then a sizeable thickness insulation board, then UFH then latex and then tiles

I don’t do many concrete floors though so perhaps someone else could advise.
 
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