Wall prep for tiling advice - Tile Advice

[Tony Griffin]

Can any of you advice me on the best action to take to prepare the wall for tiling? Removing the old tiles pulled away a lot of the old render, leaving the bare powdery surface covering the brickwork. Thank you

 

[WetSaw]

What tiles are going back up? How much space have you got to play with?

 

[Tony Griffin]

600 x 300 ceramic tiles going back up.

 

[On one]

Have you taken all of the loose finish plaster off
How much of the undercoat plaster is visible %

 

[Wayne Brown]

Remove all the loose plaster seal all the walls with a mix of 3 parts water to 1 part unibond once dry apply a neat coat of unibond, this will leave a slight tack to the surface when dried then the whole room will need reskimming , this will need time to dry maybe a week before sealing with a quality acrylic tile primer 2 coats follow the manufacturers instructions good prep will give you a great finished job. Cheers kop

 

[mma]

.

 

[Unused Account 1]

Easier to just plasterboard ifyou have the room

 

[Waluigi]

Shame it’s not a nice S&C render underneath.

First thing I’d do to that wall is get a straight edge on it to see what I have. Also check to see how Plumb it is.

The majority of the time these days, I take it back to brick/block and dot and dab plasterboard on. Get things perfect at the early stages and the finished product will be far better. 600 x 300 is still a large tile so the wall needs to be flat.

I’m not saying this is necessarily the best course of action. You might be able to get away with a skim. Suction will be ridiculous o that though so PVAing needs to be thorough.

 

[Tony Griffin]

Have you taken all of the loose finish plaster off
How much of the undercoat plaster is visible %

Most of it yes, had only shortly before removed tiles so still need to scrape some more off. This is where the bath was and the skim coat over the render was quite crumbly and practically fell off leaving the finish you see in the pic.

 

[Tony Griffin]

Remove all the loose plaster seal all the walls with a mix of 3 parts water to 1 part unibond once dry apply a neat coat of unibond, this will leave a slight tack to the surface when dried then the whole room will need reskimming , this will need time to dry maybe a week before sealing with a quality acrylic tile primer 2 coats follow the manufacturers instructions good prep will give you a great finished job. Cheers kop

Thanks for the advice Wrighty. Is reskimming the walls the only way? Is this is the best option then so be it. Can l not just skim the areas that sit back of the render that is left behind? There must be a 3mm difference.

 

[Tony Griffin]

Easier to just plasterboard ifyou have the room

I was considering that, but it is a space issue yes. I may just do that wall as other walls have stayed sound after tiles have been taken off. Would you take it back to the brickwork and dot and dab straight onto that or would it need sealing first?

 

[Spare Tool]

I've not come come across a perfectly skimmed room yet.. Imo best way would be to either overboard as it is and mechanically fix through to brick, or knock the lot off and dot and dab plasterboard and take that opportunity to get everything flat and plumb..
You will no doubt be pushing your weight limits very close to or more than likely over recommended skim weight limits anyway.

 

[widler]

I've not come come across a perfectly skimmed room yet.. Imo best way would be to either overboard as it is and mechanically fix through to brick, or knock the lot off and dot and dab plasterboard and take that opportunity to get everything flat and plumb..
You will no doubt be pushing your weight limits very close to or more than likely over recommended skim weight limits anyway.

You have not come across a perfectly skimmed room yet me and you are going to be having words

 

[Andy Rhodes]

If its only 3 mm & your walls are true give it a good coat of acrylic primers undiluted preferably then skim over with powered adhesive & use a 8 or 10 mm notched trowel to fix tiles with

 

[Time's Ran Out]

I’ve always found a few coats diluted doesn’t skin.