Travertine floor

[woodie]

Hi all, care to give me any ideas? i've got a few of my own but we'll see. I laid a rather large travertine floor about six or seven months ago, when i laid it the floor looked and felt dry i gave it a scratch or two with my chisel and the scratches didn't darken so i primed the the floor with Bal prime APD left it all to dry out for the night and started tiling the next day, job took me about 4 1/2 days and it looked perfect after i'd finished, three or four months later i get a call saying that the tiles started popping i went and had a look and it started where the ufh was coming through from the utility room and following the course of the ufh kitchen areais fine (no ufh) as is the utility room any ideas?:incazzato:

 

[DHTiling]

What substrate is it and what adhesive did you use.?

 

[woodie]

it's that anhydrate(or whatever it's called) and i used white single part flexible:8:

 

[DHTiling]

Did you remove the laitance from the surface and how long had it been down..?

Also how did you go about priming it..?

 

[woodie]

removed the what? i primed it with a paintbrush:8:

 

[woodie]

:8:and it had been down for at least six weeks

 

[DHTiling]

Have you had no experiance with anhydrite screeds before...?.

As they are laid and dry , within a couple days or so a laitance is left on the surface and this has to be removed...mainly by sanding it off...then you use a 4:1 coat of acrylic primer and then increase the strength after each coat dries till you coat with 1:1 acrylic primer/water.

But the moisture in the screed MUST be low enough first before any prepping of the screed..0.5% if a recall correct...1mm per day for the first 50mm and 2mm per day for any thicker before you can tile direct..

Sorry to say this woodie...but you have stuffed up by the sounds of it.

 

[Ajax123]

Hi all, care to give me any ideas? i've got a few of my own but we'll see. I laid a rather large travertine floor about six or seven months ago, when i laid it the floor looked and felt dry i gave it a scratch or two with my chisel and the scratches didn't darken so i primed the the floor with Bal prime APD left it all to dry out for the night and started tiling the next day, job took me about 4 1/2 days and it looked perfect after i'd finished, three or four months later i get a call saying that the tiles started popping i went and had a look and it started where the ufh was coming through from the utility room and following the course of the ufh kitchen areais fine (no ufh) as is the utility room any ideas?:incazzato:

Oh hells bells ...Lots of stuff going on here... My first instinct is too much moisture in the screed but that may not be it so let's go from the start. Do you know who the screed supplier (e.g. Lafarge, Tarmac, Cemex etc.) and what area of the country is the job in. How deep is the screed, was the underfloor heating up and running before you tiled (assuming it is a screed embedded system.

 

[brian c]

😳😳😳

 

[woodie]

no the heating wasn't even conected up before i laid it and the builder told me 'this stuff dries very quickly and he wanted me to lay the floor two weeks after he put the stuff down, this is in south wales but i don't know the supplier. i don't know about this laitance malarky but the floor had been walked all over for at least a month before i started layin it and it had more than one coat increasing the valume of primer ,the owner had this checked out apparently and they said the floor was still damp, 'not in my opinion:8: