Tiles coming up, cracks, and hollow points Page: 2

[acaciaguy]

You need to know exactly what the screed is to get the information from the forum that may help your case.
The tiles should have been solid bed fixed.

I agree. Laitance etc my be a factor depend on screed. Many variables. More info the better

 

[DazedConfused]

You need to know exactly what the screed is to get the information from the forum that may help your case.
The tiles should have been solid bed fixed.

I will try and get this information from them but at the moment they're not forthcoming with anything that might imply they're at fault.

With respect to the solid adhesive, I think I understand what a solid bed is (i.e. you shouldn't see the trowel ridges as in the pictures) but what is solid bed fixed?

 

[acaciaguy]

Solid bed is near if not 100% coverage of adhesive between tile and substrate. It needs to be of a sufficient depth depending on tile and state of substrate. In your case you would want a 20mm x 10. Round notched trowel with a back skin to the time to ensure 100%

 

[DazedConfused]

Yes, look at what John typed regarding the screed type. I agree that the fixing method was wrong but the adhesive used and prep of the floor might also be wrong. I would try to get some details from your contractor.

I'll try and find out what screed was used tomorrow.

In what was was the fixing method wrong?

The adhesive used was 4trade Floor & Wall Tile Adhesive - Fast Set.

Is there anyway to determine if primer was used to prep the floor before tiling?

 

[One Day]

Looks like a typical "rubbish" installation by idiots. i.e. lack of coverage, failure to back butter, no priming etc etc.
I would add though, that picture number 2 appears to show a crust stuck to the ribs under the tiles.
Could this be a layer of laitence which is debonded from the main screed? You can get laitence on any screed, not just anhydrite.

 

[On one]

Judging by how easily the tile adhesive is coming up off the floor,there was no or little priming

 

[DazedConfused]

Solid bed is near if not 100% coverage of adhesive between tile and substrate. It needs to be of a sufficient depth depending on tile and state of substrate. In your case you would want a 20mm x 10. Round notched trowel with a back skin to the time to ensure 100%

Given the tiles they took up had less than 50% coverage, if the rest of the tiles have similarly insufficient coverage would this be considered a defect to be rectified even on the tiles that show not visible signs of impairment?

Would I be wrong to presume the probability of the tiles having future issues due to insufficient adhesive coverage is much higher than it should be?

 

[White Room]

4/trade is Travis, not the finest in my opinion .

 

[acaciaguy]

If you have issues with some. You may have issues with all. I would pick 5 tiles at random across the area and take the them up. If. They are as others then the whole lot of the same. Sorry

 

[One Day]

The adhesive is made by Bostik and sold by Travis Perkins.
Although it claims to be flexible, perhaps it isn't flexible enough?

This other adhesive claims C2FT
4TRADE Flexible Non-slip Fast Set Floor & Wall Tile Adhesive White 20kg | Travis Perkins - https://www.travisperkins.co.uk/4TRADE-Flexible-Non-slip-Fast-Set-Floor+Wall-Tile-Adhesive-White-20kg/p/106850
whereas yours doesn't - and that would concern me greatly.
Unfortunately, there is no other data I can find...
Even if the adhesive is wrong, the installation method is so rubbish, it would likely have failed anyway.