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