On the concrete surface, which has a small bias, you need put the tiles with a special solution. Where necessary, we make a cutout on the tile, using the special cutter.
Solution should be put on the concrete surface and on the tiles.
Further put the tiles on the concrete surface, and easy to press it from the top side.
Distance between tiles will consider special plus sign.
After placing all the tiles in this way, you need to remove the plus sign, and fill the remaining spaces with a special solution fugue. For its filling, using a special rubber spatula. After filling and hardening of the fugue, clean the surface ceramic with using a damp cloth.
that's all the work for laying tiles on the floor