Taking a square tile and putting it on its point can transform this basic tile into a new and interesting design element: the diamond pattern.  Installing tiles on the diagonal transforms the look of square tiles. Diagonal patterns can be applied to walls, floors and back-splashes. In other words, wherever you install tile you can install tile on the diagonal.

For floors, diagonal tiles can make the footprint of the room feel larger. If you use black and white tiles or colored linoleum tiles, your pattern will be more obvious.  Stone or single colored ceramic or porcelain will have a more subtle pattern.  Using a contrasting or white grout will call more attention to the diamond patterns.

A diamond pattern used as a back-splash is a great way to bring more attention to the wall. Using a diamond pattern with simple square tiles allows you to have a more sophisticated feeling backsplash without the expense of it.

Diagonal lines can also be achieved using wood floorboards. This is an unconventional way to install wood floors. Diagonal lines would look cool in a contemporary or loft space. Double-diagonal patterned wood floors create a herringbone pattern that is more traditional. Herringbone or zigzag patterns are also a big trend for wall and upholstery patterns right now.

Diagonal lines, whether in diamond patterned tile backsplashes or chevron patterned rugs, add dynamic interest to a space. Even a zigzag patterned throw or pillow on the sofa can add this design trend to your décor.