Here are 5 basic steps to help you do the job successfully.
Tile over painted concrete block wall.
Removing the paint is a long and tedious process but by creating an intermediate surface between the painted blocks and the tiles you can solve the adherence issue without the need for paint removal.
If you properly paint a concrete block wall it will last for years with little upkeep.
Place strips of blue painter s tape over the tile face sticking each end to the wall to prevent the tiles from sliding or falling off as the mastic sets.
Answer answer it is possible to bond porcelain tile to a painted surface but it isn t recommended because the overall tile attachment is limited to the strength of the bond of the paint to the concrete.
Tile cannot be attached directly to painted concrete as the thin set will not adhere well to the paint.
It s easy to paint concrete concrete surfaces are common in households especially on exterior walls and surfaces surrounding the home.
Thin set alone will not help the cement board stick to the concrete slab.
Painted concrete can be sandblasted sanded or ground down to bring up a nice porous surface.
Installing tile over concrete walls is possible but presents some unique challenges.
The cinder block wall needs to be thoroughly scrubbed of dust from grout and chunks of loose brick so that the new tiles will be able to adhere easily and not fall from the wall or crack or crumble over time.
The key to a long lasting and attractive tile installation is proper substrate preparation.
Step 1 clean the wall.
Attaching cement board to concrete is not an acceptable way to surface the concrete prior to tile installation.
Painted concrete can be made porous with sandblasting or other hard abrasive actions.
Tiling over painted block can be problematic due to the inability of the tile adhesive to stick directly to the painted blocks.
Most tile professionals including john bridge concur.
First a surface more textured and solid must be applied over the painted concrete.
Even though it s rough texture makes it a piece of cake to get fresh paint to adhere to untouched concrete every so often your concrete need to be touched up with a fresh coat of new paint which is a bit more challenging.
There are two basic types of finish on concrete block smooth and split face.
Tiles come in a variety of natural and man made materials and they make durable attractive surfaces for both walls and floors.
Regardless of the finish and whether the concrete has already been painted the cleaning procedure is very similar.
This surface is called a scratch coat.
Allow the mortar or mastic to sit for at.
A scratch coat will give the mortar something to hold on to instead of the layer of paint over concrete.
You should either strip or bead blast the concrete and thoroughly clean it.