While you can install tile directly on concrete problems erupt when the concrete cracks or shifts.
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.
An epoxy based paint requires an epoxy adhesive to bond to it.
First a surface more textured and solid must be applied over the painted concrete.
For application over an uneven concrete surface a lightweight waterproof construction board.
You can get this from construction or hardware stores.
You should either strip or bead blast the concrete and thoroughly clean it.
You can leave the paint on drywall provided there are not several coats and the tile epoxy will adhere with no problem.
Before beginning a tile installation over a concrete wall perform an inspection to look.
Vacuum up all loose dust debris and paint residue.
Water should readily absorb in the concrete as an indication that it is suitable for bonding the tile to it.
Ventilate and dehumidify the area before during and after the installation because basement walls are usually susceptible to moisture.
Rent a circular concrete sander from an equipment rental store.
How to install tile on a painted concrete floor step 1.
This surface is called a scratch coat.
A scratch coat will give the mortar something to hold on to instead of the layer of paint over concrete.
Mortar cannot be installed directly over painted concrete itself.
Go back over any spots that have remaining paint with your.
Can i put tiles over painted concrete walls.
Using the sander will generate a lot of dust.
If you choose to try to bond the tile to the paint then you need determine what type of paint it is.
Painted concrete can be made porous with sandblasting or other hard abrasive actions.
If the paint comes loose so does the tile.