Tile offers a plethora of design options in a home. It is great for indoor or outdoor use, comes in a variety of sizes, colors, shapes, and applications, is easy to clean and maintain, and is extremely durable. While tile is versatile, there are specific uses that work best with different types of tile. This information is easy for any consumer to understand if you are able to read the coding printed on tile packages. The four most important things to know about tile when purchasing are; slip resistance, grade, water absorption, and wear rating.
Slip resistance is important for tile being installed anywhere, but it is most important in wet areas such as entry areas, pool decks, kitchens, and bathrooms. Slip resistance is measured by the tile’s Coefficient of Friction (C.O.F.) or a tile’s resistance to slip. A tile with a lower C.O.F. number means that the tile has less friction or traction and could be susceptible to slippage. A tile with a higher C.O.F. means that the tile has a higher slip resistance and would be a good choice for a wet area. A C.O.F. higher than .50 is typically suggested for residential applications.
Grade is measured in a range from 1 to 3 with one being the highest. Grade 2 is typically less expensive but is still appropriate for flooring. Grade 3 tiles are not suitable for flooring but should be used in wall application.
Water absorption (W.A. rating) allows you to choose tiles that would be best suited for wet areas. These rating categories include:
- Non-vitreous: absorbs over 7% of its weight in water and is best for dry areas.
- Semi-vitreous: absorbs between 3% and 7% of its weight in water and is also best for indoor use and dry areas.
- Vitreous: absorbs between 0.5% and 3% of its weight in water and is appropriate for high-moisture areas.
- Impervious: absorbs less than 0.5% of its weight in water when exposed.
Wear rating is also called the PEI (Porcelain and Enamel Institute). PEI is only given for glazed tiles (you will not see a PEI rating on unglazed tiles) and it determines the tile’s ability to withstand use with the least amount of abrasion; basically, it’s sustainability. The rating chart information is shown below:
PEI Rating…
I & II: are decorative tiles for wall use only.
III: can handle wear and can be used in most residential applications.
IV: suitable for all residential uses and some light commercial applications.
V: most resistant and suitable for high traffic areas such as commercial projects.
Now you’re informed! Even though picking a tile based on appearance can be a process, keep in mind that there’s more to tile than its color and texture. Use these ratings to get the right tile for the right space that will last.