Floor tiles lifted on calcium based self level floor

[Ajax123]

Pics look like combination of moisture and poor prep. Lots of laitance and dust on the back if that tile which suggests inadequate sanding or vacuuming. Looking at it I think you would have struggled even with a compatible adhesive. With cement it looks like it was doomed.

 

[Ajax123]

I don't understand how they can **** up a liquid screed as badly as they do, got one on myself in April, the one Andy Local sanded for me and its 50mm out from one side of the room to the other

Thats a heck of an achievement...

 

[hmtiling]

if I could choose one substrate only to tile on it would be the alpha hemi hydrite ones I get here. Every tiler should have testing equipment but especially for gypsum screeds.
Anyway, mine's good to go

 

[Ttt1601]

Just because it's been professionally sanded, doesn't mean it's been done properly, most of the Anny screeds I go to, they say, the company came back sanded it so it is fine to tile, when in fact it's not, sand them too early and more latence will settle, and the guys screeding don't care about the prep a quick go over with light machine and they think it's fine, when in fact again it's not, same with proper dying times, they tell customers it will dry in X amount of time, when we all know it's only dry when a proper hygrometer or other test is done and gives sufficient reaults. Knowledge on these screeds is key

 

[widler]

Apparently tilemaster make analfix to order now, as it’s not widely used and being sodded off, as it causes more problems for contractors than the initial layout .
Most of the ones I’ve done are ok, the one I’m on at the moment is the worst floor I’ve ever tiled

 

[widler]

Just because it's been professionally sanded, doesn't mean it's been done properly, most of the Anny screeds I go to, they say, the company came back sanded it so it is fine to tile, when in fact it's not, sand them too early and more latence will settle, and the guys screeding don't care about the prep a quick go over with light machine and they think it's fine, when in fact again it's not, same with proper dying times, they tell customers it will dry in X amount of time, when we all know it's only dry when a proper hygrometer or other test is done and gives sufficient reaults. Knowledge on these screeds is key

They have to be sanded in the 1st few days or he latency gets too hard ?

 

[One Day]

@widler "analfix"? Really?!

 

[Dumbo]

Something I need after a curry

 

[widler]

@widler "analfix"? Really?!

Without a doubt its anal and you fix it

 

[Flintstone]

You can sand these screeds at any time, yes they are softer in the early days but still sandable after many months.

 

[widler]

You can sand these screeds at any time, yes they are softer in the early days but still sandable after many months.

Aye I know mate, but doesn’t it help with the drying process as well ?

 

[Dumbo]

Aye I know mate, but doesn’t it help with the drying process as well ?

According to our industry expert @Ajax123 , no it doesn't.

 

[Flintstone]

No, I think that's an old wives tale.

 

[widler]

Its a funny old world we live in, rules change dsy to day

 

[Blunt Tool]

I’m old school, I pee on them and time how long it takes to dry then refer to the water table graph, as per saturation point!

 

[J Sid]

I believe you

 

[Just Rizzle]

got anhydride floor to tile in 2 weeks going to use bal bone mat loose lay bal doing free test

 

[Just Rizzle]

I agree with @Localtiler . I read years ago 80% of all new floors in France were lafarge gyvlon

yes and weber in france do a specialist adhesive to stick to there floors it is an anhydrate adhesive.

 

[Ajax123]

yes and weber in france do a specialist adhesive to stick to there floors it is an anhydrate adhesive.

yes they do. They did it over here for a while but the market did not ask for it enough to warrant keeping it. Shame really.

 

[Ajax123]

I agree with @Localtiler . I read years ago 80% of all new floors in France were lafarge gyvlon

probably a bit optimistic. Probably closer to 50%. Around 25% of new floors in the UK are anhydrite. that number is increasing year on year. 5 years ago we reckoned it was about 15% and 10 years ago only about 5%. long may the growth continue. It pays my bills...

 

[LM]

probably a bit optimistic. Probably closer to 50%. Around 25% of new floors in the UK are anhydrite. that number is increasing year on year. 5 years ago we reckoned it was about 15% and 10 years ago only about 5%. long may the growth continue. It pays my bills...

Alan what’s your opinion on cemfloor screeds? Again a new one to me but I tiled on one recently and it was a joy.
Cemfloor Liquid Screed Northern Ireland - perfect for underfloor heating - CES Quarry Products Belfast, Saintfield, Moneyreagh - https://www.cesquarryproducts.com/cesliquidfloorscreed.php

 

[Ajax123]

There are a few cement based liquid screeds in the market at present. They are my competitors and whilst they have found a place in the market there are some pretty bold and dishonest claims made about them unfortunately. I suspect the would be unable to back up many of the claims they make. I have heard varying tales just as I have with anhydrite but when all is said and done I would not make a claim that could not be supported...

 

[Italy]

Alan what’s your opinion on cemfloor screeds? Again a new one to me but I tiled on one recently and it was a joy.
Cemfloor Liquid Screed Northern Ireland - perfect for underfloor heating - CES Quarry Products Belfast, Saintfield, Moneyreagh - https://www.cesquarryproducts.com/cesliquidfloorscreed.php

here only this type of liquid screed is used, otherwise sand and cement.

 

[Flintstone]

I think I made a thread about cemfloor last year Lee and there claims about you can tile if after a week and no need to send it, load of nonsense. The one I tiled didn't crack and it was perfectly flat.

 

[LM]

I think I made a thread about cemfloor last year Lee and there claims about you can tile if after a week and no need to send it, load of nonsense. The one I tiled didn't crack and it was perfectly flat.

I read the claims of tiling after 4/5 days but the rep for this supplier said 25 days. I left this one for 5 weeks, sanded it and gave it 3 coats of primer, It was up there with one of the flattest floors I’ve ever tiled.