Tiles cracking, is it the adhesive or something else?

[John Benton]

If there is a tanking membrane then surely the substrate cannot have water ingress, possibly movement but without knowing what the background is it's difficult to say

 

[White Room]

That's why I asked about substrate, if it was dry lined onto block/brick walls and any holes etc to be blocked to stop any air flow behind the wall that can cause condensation on the tile surface if cold air is allowed to travel behind the board.

 

[AliGage]

If there is a tanking membrane then surely the substrate cannot have water ingress, possibly movement but without knowing what the background is it's difficult to say

Making the presumption that the plumber fitted the membrane well and correct.

What's the betting the membrane doesn't wrap the corner?
These tiles have broken back to front, nit front to back. Cracks in the grout in the corner all suggest swelling in the substrate.
If the membrane hasnt been wrapped around the corner or over lapped and water gets behind it through the corner not only will the substrate swell but water will also collect.

 

[John Benton]

Well water will be getting through there that is a fact, no silicon seal visible. If there is no tape or not wrapped around then chances are it could be the substrate damaged

 

[Rizzle from the Portizzle]

very simple to check the glaze get a dish fill with 3 to 4 mm of water put tile in face down glaze only in water no contact with biscuit see if lines start to apear in the back of the biscuit if the glaze is weak it will soak into the sponge like biscuit in no time

 

[jobdone]

I have seen cracking like this on a couple of occasions and it has been where the bed depth has been thick. These cracks have appeared after 3 -4 months of the installation. Having said this delamination of the substrate had occurred due to the tiles being laid on to painted walls.
Also had a couple of months ago when laying metros the glaze coming away from the biscuit.

 

[Rizzle from the Portizzle]

a lot of metros are coming in from india make of that what you will

 

[John Benton]

a lot of metros are coming in from india make of that what you will

Goodness Gracious Me Ray what are you implying

 

[Dave]

a lot of metros are coming in from india make of that what you will

Just tiled a splash back in johnsons 200x100 beveled , English tiles I hear you say ?.

Nah!!! , says made in India on the back lol lol.

 

[Dan]

BCT aren't even British now lol