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