Help! - TilersForums.com

[julie bw]

If he has done the above spot fixing...yes he would be to blame and why use pva.

I think he has spot fixed and will know when they come off next week. As for the pva why shouldnt he have used it and what should he have done. Thanks

 

[White Room]

What he should have done was use an appropriate sealer usually the same make as the adhesive manufacturer which absorbs into the plaster.
Pva tends to sit on the plaster surface and can soften even when it has dried when moisture from the adhesive soaks in to the surface.

 

[julie bw]

What he should have done was use an appropriate sealer usually the same make as the adhesive manufacturer which absorbs into the plaster.
Pva tends to sit on the plaster surface and can soften even when it has dried when moisture from the adhesive soaks in to the surface.

Ok.thanks so much for your advice.will mention this next week to him.he's already said that he wants another £200 to re tile the wall
I wouldn't mind but I didn't employ him in the first place it was the plumber who did!

 

[One Day]

In a nutshell - exactly what Whitebeam said.
There are many and varied (although quite dull) reasons why PVA shouldn't be used in tiling.
Unfortunately we hear time and again "I've always done it that way" or "that's how I was taught".
All wrong though.

 

[julie bw]

Thanks do much for your advice.greatly appreciated x

 

[White Room]

Pictures when can please.......

 

[julie bw]

Pictures when can please.......

Will do. Thanks

 

[Dave]

I think he has spot fixed and will know when they come off next week. As for the pva why shouldnt he have used it and what should he have done. Thanks

When using a cement based adhesive onto a gypsum background , you have to use an appropriate acrylic primer etc as this helps prevent a reaction between the adhesive and the gypsum backing

Using PVA simply seals the surface and :

A.. Does not prevent ettringnite formation
B.. It as mentioned above forms a skin which when wet , say by the adhesive bedding , becomes live and breaks the bond of the adhesive from the backing.

Spot fixing isn't correct application but not a deffo reason for tiles to debond , my money is on the PVA priming.

 

[J Sid]

Plumber tiling......that explains everything.
Be asking the tiler to do all your electrical work next

 

[julie bw]

Pictures when can please.......

Hi. One tile was taken off today.it was smashed so didn't have pic of it but here is the wall behind.it has been spot fixed if u can see on pic.also ll ok at the gap between the wall and other tiles.isnt this wrong? In one part you can push the measure 25 inches under the tiles before it hits any adhesive! The pics show the marks on the plaster off adhesive, the gaps between wall and tiles to the left, right and above the tile.what do you advise.should the whole wall be taken off and redone. There was also a radiator on the wall and the plumber has said it was because of that. A a a aah!