Which tile to choose depends mostly upon where you plan to install it and, of course, whether or not is has the look you want for that specific application.For the former I will explain several things to take into consideration. The latter is entirely up to you (unless you’re the husband, in which case it’s up to your wife). So before you choose your tile you need to consider a couple of things.
Where are you installing the tile?
If it will be installed on a wall in a non-wet area, you do not need to worry about much except whether or not you like the way it looks. A non-wet area is defined as an area that is not regularly exposed to a significant amount of water. Wainscots, backsplashes, and fireplaces are examples on non-wet areas.
If it will be installed in a wet area, such as a shower, you need to take into consideration the absorption rate of the tile to an extent. Although it is not that dire to consider this, the lower the percentage of absorption, the better it will be for your application.
You can install travertine in a shower but porcelain will be easier to take care of. An application such as a steam shower or exterior patio would suggest a lower absorption rate. A good rule of thumb is the higher the chance of exposure to moisture and temperature, the lower the absorption rate you want.
If the tile will be installed on a floor you will also want to consider what is called the Static Coefficient of Friction. That’s just a big phrase to describe how slippery a tile is.
This number will (usually) be below one. Just consider this number to be between 1 and 10. For instance, consider a SCOF (Static Coefficient of Friction) or COF of 0.5 to be a 5. This is the number which most standards consider “slip resistant”.The higher the number, the less slippery it will be.
Tile will have two COF numbers – one for wet and one for dry. You may want to consider both numbers for an application such as a bathroom or shower floor or a patio. Consider a 1 (0.1) to be akin to ice and a 10 (1.0) to be sandpaper.
Other factors to take into consideration include the size of the tile as well as the size of the grout lines (to a smaller degree). If you have 2 inch by 2 inch tile with fairly large grout lines, such as a shower floor mosaic, it will have more friction than 18 X 18 inch tiles with 1/16 grout lines. The grout lines add friction because they are uneven and break up the flat, continuous surface of the tile.