First a surface more textured and solid must be applied over the painted concrete.
Tile over painted concrete walls.
Before beginning a tile installation over a concrete wall perform an inspection to look.
Using the sander will generate a lot of dust.
Painted concrete can be made porous with sandblasting or other hard abrasive actions.
If the walls you want to tile are concrete walls with paint on them remove the paint before you install tile so the tile adhesive has something to grab onto and hold the tile in the correct place.
You can get this from construction or hardware stores.
You can leave the paint on drywall provided there are not several coats and the tile epoxy will adhere with no problem.
This surface is called a scratch coat.
Mortar cannot be installed directly over painted concrete itself.
Rent a circular concrete sander from an equipment rental store.
A latex based thin set adhesive should be used over the latex based paint.
For tiling over tiles in bathroom walls you ll need to set up sheets of waterproof membrane in between the concrete wall and tiles.
While you can install tile directly on concrete problems erupt when the concrete cracks or shifts.
Vacuum up all loose dust debris and paint residue.
Can i put tiles over painted concrete walls.
For application over an uneven concrete surface a lightweight waterproof construction board.
If you choose to try to bond the tile to the paint then you need determine what type of paint it is.
You should either strip or bead blast the concrete and thoroughly clean it.
If the paint comes loose so does the tile.
Tile cannot be attached directly to painted concrete as the thin set will not adhere well to the paint.
Inspect the concrete surface.
A scratch coat will give the mortar something to hold on to instead of the layer of paint over concrete.
An epoxy based paint requires an epoxy adhesive to bond to it.
Ventilate and dehumidify the area before during and after the installation because basement walls are usually susceptible to moisture.