Ceramic tile receives classifications from the Porcelain Enamel Institute. These classifications, commonly know as P.E.I. Wearing Ratings are:
* PEI Class 1 Rating (No foot traffic) - Recommended for wall use in residential and commercial applications only.
* PEI Class 2 Rating (Light traffic) - Recommended for both wall use and bathroom floor applications only.
* PEI Class 3 Rating (Light to moderate traffic) - Recommended for countertops, walls and floors where normal foot traffic is expected.
* PEI Class 4 Rating (Moderate to heavy traffic) - Recommended for all residential applications as well as medium commercial and light institutional.
* PEI Class 5 Rating (Heavy to extra heavy traffic) - Recommended for all residential as well as heavy commercial and institutional applications.



