Tiling on a painted plasterboard. HELP - Tile Advice

[Stavs tiles]

Hi guys,

Hope you can help on this.

On a painted plasterboard can you tile directly on this?

I was thinking of scribingthe wall with a Stanleyknife every 2 inches so the adhesive has something to grip on, then rough sanding it and then cleaning it and using BAL Acrylic primer?

Or can I just tile over the paint providing the paint is not flaking off?

Any tips would be great. Just want a good strong bond. I will be using BAL rapid set adhesive.

Cheers
Stav

 

[Rich Midge]

What's it been painted with? I definitely wouldn't scribe it, you'll irreparably weaken the structure of the boards. Try sanding it back. Could you over board it or cut it out and replace?

 

[Stavs tiles]

Hi Rich, it's white emulsion paint.

Don't really want to board it again. It's a new build flat only 3 years old, so was hoping if I primed it up with acrylic it would give the adhesive something to grip to?

Attached are some pics of bathroom, the white small Ines will be removed.

Thanks

 

[Unused Account 1]

Just prime it and tile ,what size tiles you using

 

[WetSaw]

If those tiles have been put on properly you'll probably be replacing the plasterboard anyway.
What tiles are you putting up and are you tiling the whole wall?

 

[Stavs tiles]

Thanks guys, hoping the small tiles will come off ok, if not will have to reboard. I'm using 600x300 ceramic Matt tiles. Using BAL rapid set adhesive.

My main worry is just want the tiles to be bonded secure on the current wall :0

 

[Stavs tiles]

PDC sorry, tiling all the wall flirt to ceiling.

 

[Rich Midge]

I'd sand, clean then prime. Prime first with a quite a dilute mix so it absorbs right through the paint say a 5:1 mix then when that's dry go over again with a 3:1.

 

[Stavs tiles]

Thank you so much Rich, really appreciate your help

Will be using the BAL prime APD this is Acrylic based.

 

[One Day]

I'd suggest you call BAL technical tomorrow morning. They'll tell you!

 

[Rich Midge]

Not been a Bal user for years so can't feel I can comment on their primer. If you do call Bal technical tomorrow I can't imagine they'd advise anything other than replace or overboard, which is realistically what a pro would/should do. As mentioned earlier, see how you get on taking the existing tiles off. Chances are they're pulling the board with them.

 

[Stavs tiles]

Just thinking guys and sorry to open this up. What would the scenario be with a painted wall not plasterboard.

Image getting the paint off and scraping/sanding down is just the better option with this as well....

 

[Rich Midge]

Yep, basically you need rid of paint, especially emulsion.

 

[LM]

BAL technical told me in the past to apply a piece of high quality sellotape to the wall and rub on firmly, leave it for ten minutes and then remove it, if the tape pulls the paint off then you can't tile on it, if not then it should be fine providing you don't exceed the weight limits for plasterboard.

 

[Rich Midge]

Didn't think the tape test applied to emulsion paint though Lee? Thought it was only to be used on gloss and the like. My understanding was that emulsion could start to break down when wetted so shouldn't really be tiled on.