Another case of hollow tiles

[RedSpottedSev]

Hi,

 

Another hollow tiles decoupling help please.

We have had 96m2 of 60x90cm porcelain tiles laid in a 2/3 pattern.

There is wet UFH, covered with screed, then primed, then decoupling applied, then the tiles were placed.

I was there for the start of the works and they were back buttering and laying with notched trowel.

It was all perfectly level and beautiful, however after 3 months started to notice the grout lines showing signs of movement, and now at least 4 tiles have play in the corners.

 

After reading about the issue, tapping every tile, it seems all around the edges of almost all the tiles are hollow.

I drilled 3mm holes depth of 2cm in the corner joints and 20cm distances along the grout lines. Got some fix-a-floor to fix the ones that are moving, and also to put around any tiles showing signs of movement but can't feel the movement.

 

I am fairly disheartened as today one side of a tile gullupped up x2 of the tubes and Im not even sure if it is all filled. Each tube is £13. I just can't afford that rate of fix a floor per tile (As I was planning on doing the lot)

 

My question is, can I get an alternative to get down through 3-4mm holes to preemptively fill all gaps to try and save a full lift up (which would involve moving out the house and family has already had enough of the renovations over running). Can self levelling compound or othe adhesives be mixed thin and put down there? Any ideas welcome... 

 

Thanks

[Mr Punter]

Have you been in touch with the tilers, or was this DIY?

 

I have not used fix-a-floor but there should not be problems with the tiles over such a large area.  If it were me I would do a small area and monitor before taking on the whole floor.

[torre]

I'd be getting in touch with your tilers before doing any remedial work. 
 

14 hours ago, Mr Punter said:

there should not be problems with the tiles over such a large area

If you're having problems already it's hard to believe they won't get worse, put the onus on them to fix any issues

[RedSpottedSev]

Thank you,

Our builder did the floor, they arent a specialist flooring/tiling team. I spoke with them and they also said they were going to fix it with fix-a-floor.

I am worried about the long terms as I think the movement is being caused by dead space around the edges. 

 

I was curious to know if anyone had used anything except fix-a-floor.

 

If my builder's doesn't have any good suggestions or fobs me off, I think I want to use a 2 part self levelling screed like Ardex NA through a mortar gun and a thin nozzle to get between the tiles. Is this a really bad idea?