Floor Tiles Lifting On Anhydrite Screed

[wayne]

Not sure where it was John. The plumber was telling me about it on a job we're both on. I think he got all the gear from Sts. Plumbing company are from Wakefield

 

[John Benton]

Not your job then Wayne?

 

[wayne]

No mate not mine thank god.

 

[Dave]

If the kitchen is in working order , any chance of a washing machine etc leak.?

These gypsum adhesives dont like getting wet ..

 

[wayne]

I will ask him Monday. I just thought it was funny that they are blaming it on no expansion joints when the floor was damp under the tiles

 

[Ajax123]

Soloflex is not gypsum based. If its wet under the tiles it probably wasn't dry in the first place. It maybe that water has got in afterwards but in my experience this is much less likely.

 

[Ajax123]

I've done one that has failed had reps out from Kerakoll, Mapei and the company that installed the floor. In my opinion nobody has a clue the product seems to be unstable, I ended up going with Kerrakol Eco h40 I think(memory lacking) it was mineral based floor a abraided and vacuumed as recommended. Six months later failed or should I say failing. Fortunately the contractor took responsibility for it because I refused to do it because it wasn't fully dry in my opinion.
Done another one recently but gone for Mapei adhesives as per there recommendations installed on ditra then if it does fail the floor should hopefully stay in position. Gyvlon, anhydrite what ever you want to call it "walk away" nothing but trouble.

Blimey...its been a while since I heàrd that phràse

 

[AD Ceramics]

Blimey...its been a while since I heàrd that phràse

Which phrase it that pal.... 90m2 floor.... Is there an expansion joint in the flow screed/gyvlon-anhydrite? Then there is no point in the the tiles, even more so if a de-coupling mat... That's my opinion. Controversial maybe

 

[Ajax123]

It was the walk away nothing but trouble comment.... I've not heard that for ages. It's not trouble unless you don't know how to deal with it. Reference your joints comment I always say that just because the screeder hasn't done his bit properly why would the tiler want to cut corners. If the standards say a joint is needed then put it in. At least that way if it does go wrong you are able to say it ain't your issue.
I think realistically though if an anhydrite screed has no movement joint there should still be one in the tile face as the tiles and adhesive are likely to move much more than the screed. Ditra certainly helps but its not always needed.

 

[AD Ceramics]

It was the walk away nothing but trouble comment.... I've not heard that for ages. It's not trouble unless you don't know how to deal with it. Reference your joints comment I always say that just because the screeder hasn't done his bit properly why would the tiler want to cut corners. If the standards say a joint is needed then put it in. At least that way if it does go wrong you are able to say it ain't your issue.
I think realistically though if an anhydrite screed has no movement joint there should still be one in the tile face as the tiles and adhesive are likely to move much more than the screed. Ditra certainly helps but its not always needed.

I understand what you are saying, I know how to deal with it, or I thought I did. I don't cut corners, the new builds I do the floors in say a kichen for example may range from 60-90ish m2 do you think the developer/client wants to see and expansion joint through there 200k-300k kitchen.
And if the screeder hasn't done his job properly where do you determine the floor will crack? If I am carrying tiles through in to other areas I put expansion joint in a doorway that's a typical place for failure.
I know tilers, developers, builders that have followed the correct procedure for anhydrite screeds and they have failed, and I know ones that have disregarded the procedure and they're stuck solid and not had issues, why is it so unpredictable? Your a screed advisor.....your thoughts please.