Help please repairing floor

[Storrs]

I have a large kitchen 65m2 laid by builders on a suspended floor.

builders used, 18mm Ply and ditra matting and the laid 600x600 tiles. Floor is 4 years old and I have lots of movement, 50+ cracked tiles and grout falling out daily.

I don’t know what to do anymore - builders are now uncontactable and I’m considering small claims court.

what did they get wrong and what should I replace with ? Floor cost £8k+

 

[Andy Allen]

builders tiling is what went wrong...!

 

[Paulg83]

What type of tile is it?

 

[Dave]

Is the 18mm ply straight onto joists ? , im taking it is a timber suspended floor. ?

 

[Andy Allen]

could be a floater...

 

[Storrs]

Builder actually subcontracted to tiller

yes 18mm direct onto joist and porcelain tiles used.

I have one 2nd opinion so far stating that backing board should have been used.

thanks in advance

 

[ttt tiling]

18mm ply and ditra is perfectly acceptable, but there is a lot that can go wrong if not done properly.
Could be insufficient noggings , ply not primed , tiles not bedded properly and the list goes on...

 

[Joshjupp]

Is there lots of bounce in the floor could be numerous reasons but might be a floating floor
[automerge]1578608404[/automerge]
Do you know what’s under the ply

 

[Storrs]

Is there a scientific way of measuring bounce? Is it true that Ditra only helps with lateral movement?
[automerge]1578636664[/automerge]

Is there lots of bounce in the floor could be numerous reasons but might be a floating floor
[automerge]1578608404[/automerge]
Do you know what’s under the ply

Not really - the joists and underfloor heating

 

[Boggs]

Get a glass full to the top with water, sit it on the floor and jump up and down.

 

[Dave]

Are there columns or support walls under the joists , that is a large area , is it a single room ?

 

[J Sid]

Not really - the joists and underfloor heating

Could have said at start!

 

[Dumbo]

So is the buildup ply ufh ditra or ply ditra ufh

 

[J Sid]

Or under the ply?

Not all info again 😭

 

[Dave]

So is the buildup ply ufh ditra or ply ditra ufh

Or piped within the joists ??