Tiles sound hollow under underfloor heating

[Alan Field]

Hi Guys,

I need help!! Basically I employed a cowboy and now there is a problem I can't contact him!

I had my floor tiled (over 200sqm) prior to turning the under floor heating on. Now the heating has been on and off for over a month the tiles sound hollow when I walk over them! I feel they will crack in time and I haven't moved in yet so need a quick solution!! Will i need to take all the tiles up? It's not all of them just 3/4.

Thanks in advance.

 

[Dumbo]

Mapei adhesives do something called epojet . I am told this can be injected under tiles to stick them down and fill the voids . You should call Mapei technical and speak to them about it .

 

[J Sid]

what was the screed?
what are the tiles?
was an uncoupling membrane used?
how was the heating commissioned?

 

[Simons70]

IMO there is no way to sort out properly unless rip out and start again,maybe with some experienced tiler who know what need to do.
Every time when I feel your pain I think at attitude like this;

''I did receive your quote however it was higher than others I have received unfortunately. thank you for your time''
Check references,check previous job,check all you can before you hire someone,especially in big jobs!

 

[Alan Field]

what was the screed?
what are the tiles?
was an uncoupling membrane used?
how was the heating commissioned?

The screed was a liquid thermio screed. And the tiles were ceramic. Not sure on the membrane? What does it look like?
Heating was turned up 5 degrees at a time and turned down the same

 

[J Sid]

possible bad prep to screed before tiling.
do you know what prep was done and what adhesive was used?
sadly, as has been said, probably all up

 

[Simons70]

The screed was a liquid thermio screed. And the tiles were ceramic. Not sure on the membrane? What does it look like?
Heating was turned up 5 degrees at a time and turned down the same

Ceramic!Sure is suitable for floors ,especially heating floors?

 

[Dougs Third Go]

The screed was a liquid thermio screed. And the tiles were ceramic. Not sure on the membrane? What does it look like?
Heating was turned up 5 degrees at a time and turned down the same

liquid thermio screed? is that an anhydrite screed?

 

[J Sid]

liquid thermio screed? is that an anhydrite screed?

I believe so, hence my question re prep

 

[Alan Field]

than

Mapei adhesives do something called epojet . I am told this can be injected under tiles to stick them down and fill the voids . You should call Mapei technical and speak to them about it .

thank you