With a notched trowel apply the adhesive at the bottom of the cinder block wall.
Tile over painted concrete block wall.
Place strips of blue painter s tape over the tile face sticking each end to the wall to prevent the tiles from sliding.
Tile cannot be attached directly to painted concrete as the thin set will not adhere well to the paint.
Before beginning a tile installation over a concrete wall perform an inspection to look.
Inspect the concrete surface.
Mortar cannot be installed directly over painted concrete itself.
Nail 3 4 expanded metal lath to the blocks with 1 1 2 to 2 inch concrete nails.
Continue placing the first course of tiles in the same manner using spacers.
Painted concrete can be made porous with sandblasting or other hard abrasive actions.
First a surface more textured and solid must be applied over the painted concrete.
Clean the surface of any dirt or debris with a ph neutral cleanser and a sponge or scrub brush.
For application over an uneven concrete surface a lightweight waterproof construction board.
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.
Can i put tiles over painted concrete walls.
While you can install tile directly on concrete problems erupt when the concrete cracks or shifts.
If your wall is freestanding with a top tile the center of the top area with the same tile that you chose for the sides of the wall but use bullnose tiles all around the top edges.
A scratch coat will give the mortar something to hold on to instead of the layer of paint over concrete.
This surface is called a scratch coat.
Hammer the nails through.
Mark the wall in the middle with a chalk line to create a guide for the tiles.
How to install ceramic tile over painted block walls for a shower step 1.