If the wall is really large i use a square to keep the corners lined up.
How to lay tile diagonally wall.
Dry fit a row of tiles along each diagonal line.
Start in a 90 degree corner.
Instead you need to find the 45 degree angles on the wall.
Diagonal tile installations draw the eye out to the sides of the installation visually widening and enlarging the space.
If you are laying the diagonal tiles over the entire backsplas simply drawing a chalk line from one corner to the opposite will not work.
Lay out tiles in a dry run to make sure they fit.
If it seems complicated try this.
This is a fold.
While a diagonal pattern might seem logical if you are using big tiles for an expansive space such as a large kitchen or great room floor many people worry that diagonal tiles can look too busy in a smaller bathroom and if you are a diyer planning to install the tiles yourself you might worry that.
Homeowners often shy away from diagonal tile layouts also called bias layouts in a bathroom.
Lay half of first tile with cut side facing 90 degree corner and tips almost touching walls at a 45 degree angle.
The best way is to arrange your wall tile in a pyramid shape.
Because tile laid on a diagonal has half tiles or pieces of cut tile along each edge of the installation a lot more tile is required to complete the job.
When i tile diagonally on a wall i always use a straightedge in the middle of the wall.
There are only two ways to handle an inside corner with diagonal tiles.
For the tiles near the center line up the two sides of the tiles with the diagonal lines and the opposing corners of the tile with the straight.