First of all you have to prepare the walls in a professional manner before tiling the corners.
Tiling internal wall corners.
After tile to fill stitches how use to tile joint filler corners and surfaces finishing tile joints confuse the mass of small amounts and are working with t.
Next sand the joints as to make them level with the rest of the wall otherwise the tiles wouldn t be plumb.
Space the two tiles consistent with the rest of the tiles generally 1 8 inch which will leave a 1 4 inch space at the corner.
Step 4 applying adhesive.
Depending on the type of tile you are using check with the manufacturer s instructions for how to apply the thin set and set the tile.
If you have to install full tiles along the internal corners we recommend you to spread tile adhesive directly to the wall by using a large notched trowel.
Therefore you have to install hardibacker on the areas exposed to water and seal the joints by using thinset and paper tape.
Measure the areas to be installed with tile trim and then them measure again to be 100 sure.
Butter the back with adhesive and press it into place with the cut edge facing into the corner.
Measure and cut a tile to fit the width of the gap to be filled.
Plan the installation of your tile trim alongside the installation of your tiles.
Apply mortar to the back of the tile with the notched trowel.
There are several techniques for spreading tile adhesive on the walls if you want to get the job done like a pro.
Press the tile against the wall with the cut side facing the corner and the other edge next to the last full tile in the course.
Place all the whole tiles on both walls either side of the corner.
Use your tile cutter to score the lines and carefully tap the corner tile or use a wet saw to cut it out.
Then do a dry fit to the corner making sure you leave.