Floor Tiles Lifting On Anhydrite Screed

[wayne]

Been working alongside a plumbing and bathroom company on a job and the owner told me he'd had a failure on anhydride screed. He said they sanded the floor primed it with suitable primer and tiled it with benfer solo flex gypsum adhesive. The screed had been down over 6 months. The tiles have all popped off the floor and they blamed the tiler so for not putting an expansion joint in. I think it needed one putting in as its a large area but when they lifted the tiles all the screed was wet. Any options on this would be appreciated cheers. I thought if you didn't put expansion joints in the tiles tented up

 

[Ian]

Is there ufh? And was it commissioned prior to tiling?

 

[wayne]

Yes had ufh and all fully commissioned before tiling commenced. Just weird how they are blaming expansion joints when it's all wet under tiles.

 

[Dave]

How big an area is it and is it a kitchen ?

 

[On one]

UFH sprung a leak?

 

[Ian]

Sounds like the floor wasn't dry (strange after 6 months), I wonder if there's been a leak somewhere, gypsum adhesive doesn't like getting wet. Was the adhesive solid on the tile or a bit stodgy?

 

[Spud]

Is there a DPM under the screed and insulation and when was the moisture testing done ?

 

[wayne]

It's a big floor around 90sqm. £100000 kitchen sat on top of the tiles.glad it's not my job. The adhesive was solid from the info I was told

 

[John Benton]

LS17 Wayne?

 

[AD Ceramics]

Been working alongside a plumbing and bathroom company on a job and the owner told me he'd had a failure on anhydride screed. He said they sanded the floor primed it with suitable primer and tiled it with benfer solo flex gypsum adhesive. The screed had been down over 6 months. The tiles have all popped off the floor and they blamed the tiler so for not putting an expansion joint in. I think it needed one putting in as its a large area but when they lifted the tiles all the screed was wet. Any options on this would be appreciated cheers. I thought if you didn't put expansion joints in the tiles tented up

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.