Draw a line connecting the midpoints of both walls.
How to tile out of square walls.
Apply some of the tile adhesive to the floor in the corner of the chalk lines with your trowel.
Hang a batten board to prevent tile slippage.
A batten board helps you start your bottom most course or row of tiles.
Don t start it at the floor.
Spread thinset mortar on the bottom center of the wall.
Use tile spacers if necessary to keep the tile lines straight in the layout.
Slide your yardstick down and double check its orientation every few feet to keep the line from becoming crooked.
A batten board is nothing more than a 1 x4 or 1 x2 board screwed directly into the wall horizontally.
Take a second tile and then place it directly next to the first tile using the spacers as a guide.
Spread the mortar with the flat edge of the trowel then groove.
To ensure that the line is straight run the tip of your pencil along the edge of a yardstick or straight edge using a framing square to ensure a precise 90 degree angle.
Assess how much room will be left at the ends of the tiles near the walls.
Put tile spacers on the corners of the first tile.