Score a line and then using a wall paper scraper see if you can lift the paint from the wall before tiling.
Tile over painted wall.
Press the tiles into the mortar in the same pattern you.
For instance if you are tiling over a painted.
However this requires careful consideration and extra properties from the adhesive.
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.
Sand the old tile step 4.
You should not tile over wallpaper glossy surfaces lead paint or plywood.
Choosing the right tile.
Preparing the drywall requires that the surface be roughed up with a sanding sponge prior to applying the mastic to adhere the tiles in place.
When tiling an area that is already tiled or painted it is often necessary to invest considerable time in stripping and then repairing 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.
I would suggest marking just below where the tiles are to finish.
Paint with epoxy paint.
Previously painted textured drywall prep.
Remove any remaining dust oil or grease with tsp tri sodium phosphate or an ammonia based cleanser.
Apply primer step 5.
It is possible to tile over painted drywall as long as the drywall is sufficiently prepared beforehand.
Start by removing any molding switch plates outlet covers and other hardware attached to the area being tiled.
You may tile over existing tile painted or unpainted drywall plaster and textured walls.
Spread a small amount of mortar in an arcing fashion onto the wall where the tiles will be laid using the grooved edge of the trowel.
Can you install tile on a painted wall.
However sometimes is it much easier to tile over tile the existing layer.
Clean the old tile step 2.
If your paint tests positive call a professional.
Choose the right materials for the location.
If you re not sure if you have lead paint test kits are available.
However tiling over tile can add quite a bit of thickness so make sure your wall can handle the weight.