Porcelain floor tiles coming loose

[Gul]

The underfloor heating was working before the tiling was carried out. It had been on, I can't remember whether the tiler had it on or off when he was tiling, off I think.

How critical is joint size, would restricted movement cause the issue?

 

[Gul]

concrete floor, big area, circa 50 m2

 

[Deleted member 9966]

I can't say for definite whether the 2mm grout line would restrict the porcelain in anyway, because I'm not a professional tiler. I'm sure plenty of our pro members will be along shortly to give their views.

as for the concrete floor, was it all one area or was it part of a bigger building project perhaps where 2 different rooms became one?

also, are the hollow sounding tiles in any particular place? round the edges of the room, in the centre, near door frames?

 

[Gul]

The whole floor was laid from scratch. The loose tiles are pretty much distributed throughout the entire floor, no descreet area.

 

[Gul]

I guess I'm going to have to get a couple up with the tiler and see exactly what has happened.

 

[Deleted member 9966]

I guess I'm going to have to get a couple up with the tiler and see exactly what has happened.

to be honest, if they only sound hollow and are not loose, then getting one or two up is the best way forward. if they had already come loose and detached from the floor, this would make your life easier.

for months after laying my kitchen floor i was paranoid that I could hear hollowness below the tiles. but after nearly 2 years, they're still stuck fast.

:welcome: to the best forum in the world by the way

 

[Gul]

Thanks for the help.

 

[paul flight]

did your tiler tell you to leave the floor heating of for up to 10 / 14 days after the tiling was completed??

 

[grumpygrouter]

Personally, I think that 2mm for tiles onto UFH is too small, especially large format tiles. The grout joint is there to take up expension in the tiled surface and you have not got much leeway with a 2mm joint. I don't think this is the issue though with repect to your query, sounds more like a fixing issue of some sort. Keraquick is fine for that type of installation so I don't think that is the problem either.

 

[david campbell]

it sounds as if the floor was dusty and the adhesive has not bonded with the floor,or they tiles were not back buttered and forced into place properly!

is the adhesive stuck to the back of the tiles or floor when they have came loose