tiling on painted walls

[Leatherface]

PVA - !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Sorry to appear rude, but what the hell difference is that suppsosed to make ?

PVA will acheive nothing on an emulsion painted wall. The paint may still peel off, all that you are doing is putting another thin layer of crap onto more crap.

Sand the wall down or pay the price

Q - why do most tiling courses get you to tile onto an emulsion painted wall ?
A - Cos they are so easy to remove.

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[Dan]

Emulsion will break back down when it gets wet. Wet it with a wet paper towel and see the colour on the towel afterwards. Thus meaning that if you tile it, you'll sort of bond to it, and if you score even, you'll get some grab, but really the paint is sticking the tile to the wall and it's not designed to. Eventually they'll fall off.

If it's any type of paint that isn't water soluble, say gloss, oil based or solvent based, then scoring should do the trick, check it isn't peeling etc etc etc

 

[pippasipanoun]

Hi All,

I have been reading all your useful info here and wanted to ask for some futher advice...

I live in Thailand where the people who call themselves tilers are not trained and generally are pulled off the fields to be a tiler for the day!!! I have 4 guest villas that the floors and bathrooms have already been tiled and, considering the above, they haven't done a bad job.

However, the builders who built our house emulsion painted the kitchen and bathroom walls instead of tiling them (cheaper and easier for them!) but we now want to tile them. The bathroom walls get mouldy quickly so this is unhygenic (especially as we have a toddler) and also makes it difficult to prepare for tiling. Also, the tilers here just slap the tiles on using concrete. They do grout but don't use any other tiling products. Can you offer me any further advice on preparation of the bathroom walls and whether using concrete on top of emulsion painted walls to secure the tiles is a recipe for disaster? I think I may know the answer already but wanted to ask the pros!!!

Thanking you in advance.

Kind regards, Pippa

 

[Leatherface]

yes
use an electric sander and coarse sandpaper. Sand the walls to remove as much paint as possible to give a good key for the adhesive