What tile adhesive is used for large format tiles?

[DHTiling]

Not really...

Is the plaster polished,,? does the primer skin..

 

[stevep1]

the neat one definately did. like peeling sun burn. not the other coats though.

 

[White Room]

If the mist coat was'nt sticking to the walls as my previous post the plaster maybe over polished, even a mist coat won't soak into over troweled walls

 

[stevep1]

trouble is we electric sanded one wall to rough it up incase it was over polished. then tested on that every day along with the others.

 

[DHTiling]

Steve..

When priming try a 4:1 coat... priming to neat can cause it too skin.. watered down coats work better

 

[White Room]

Has the plaster been contaminated with something, did any of the primer seperate when applied to the walls.

Did you upset the plasterers by any chance ??

 

[stevep1]

we started with 1-4. only went to neat as a test when nothing else worked. and on the advice of palace tech. some people say dont make a barrier between tiles and wall and others say you have to because of the plaster and addy reacting. never had it before pray i dont again.

 

[Aston]

how long did you leave the 4 to 1 ratio ? before the next coat??

 

[stevep1]

dont think it seperated. they seemed like decent chaps (for plasterers). i know the house owner went through a spell of sacking plasterers. i dont suspect sabotage though.

 

[DHTiling]

The reaction is ettringnite and it can take 2 coats etc to fully protect and as i said before if you apply neat it can skin.

I am finding it difficult to give a reason now steve as all that i use works for me ..

Your failures haves lost me.. lets see if another set of pro eyes can recommend something..