If your paint tests positive call a professional.
Tiling over a painted wall.
Choose the right materials for the location.
I tiled on emulsion thinking i would get away with it.
The board must be fastened and prepared to support a tile installation as the surface finish.
With the exception of glossy paint any type of painted wall including textured paint can be tiled as long as the wall itself.
Answered 19th jan 2017.
Score a line and then using a wall paper scraper see if you can lift the paint from the wall before tiling.
Score the wall with a stanley knife all over the area to be tiled the more heavily the better.
Can you install tile on a painted wall.
Your good to go just make sure the tiling and grouting is done to a very high standard if water is able to pass to the wall you will end up with damp problems.
Choosing the right tile.
I would suggest marking just below where the tiles are to finish.
Things you will need orbital sander 80 120 grit sandpaper safety glasses dust mask rags tape measure pencil 48 inch spirit level mastic or thin set mortar grooved trowel tile spacers tile cutting tool grout grout spreader sponge grout haze remover optional distilled white vinegar optional.
However tiling over tile can add quite a bit of thickness so make sure your wall can handle the weight.
Only on the boarder tile mind.
Previously painted textured drywall prep.
Or prime and paint the entire wall room before starting with your tile project.
Let the wall dry thoroughly.
Weight of the installation.
You may tile over existing tile painted or unpainted drywall plaster and textured walls.
Walls can take on a new look when old paint is covered by new tile.
Additional considerations for a vertical tile installation on gypsum board include.
You should not tile over wallpaper glossy surfaces lead paint or plywood.
Start by removing any molding switch plates outlet covers and other hardware attached to the area being tiled.
If you re not sure if you have lead paint test kits are available.
For instance if you are tiling over a painted.
Remove any remaining dust oil or grease with tsp tri sodium phosphate or an ammonia based cleanser.
Flatness of the substrate.
Scrape away any loose or peeling paint or wallpaper.
The moisture in the cement makes the emulsion go soft and it can loose its grip on the wall.