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PEI Rating

PEI Rating on Glazed Tile

 

The Porcelain Enamel Institute ( PEI ) came up with a testing system to rate the strength of the glaze that is applied to the tile against scratching and wearing. The ( PEI ) Rating system uses numbers (1 being the least scratch and wear resistant, thru 5 being the most scratch and wear resistant) to rate the strength of the glaze on the tile Once the Tile is produced, most tile manufacturers will send the finished tile to the Porcelain Enamel Institute ( PEI ) to test the strength of the glaze, or they will test the glaze strength themselves if they have the proper equipment in the factory. The test is performed on a special machine by placing a carbide wheel to the surface of the tile with weights on the top of the wheel to keep even pressure. The carbide wheel is then turned in a circular motion over the tile, and depending on how many revolutions it takes to penetrate the glaze of the tile is the number rating it receives. For example, for a tile to receive the highest rating, which is a PEI RATING of 5, the glaze will have to withstand over 10,000 revolutions on the machine! The following PEI RATING GUIDE will help you choose the right tile for your particular project.


PEI Rating Guide

PEI 1

 

Very Light Traffic

 

These Tiles can be used on all Indoor Wall applications, Interior Light use Countertops such as Bathroom, etc., and Very Light Traffic Residential Bathroom Floors. These Tiles are not recommended for any area that will have any constant or heavy foot traffic.


PEI 2

 


Light Traffic

 

These Tiles can be used on all Interior Wall Applications, All Interior Countertop applications, and Light Traffic Residential Interior Floors. This Tile should not be used in areas such as kitchens, entry ways, stairs, or areas with heavy traffic.


PEI 3

 


Moderate Traffic

 

These Tiles can be used on all Interior Wall Applications, All Interior Countertop applications, and all Residential Interior Floors. This Tile should not be used for Commercial Use.


PEI 4

 


Moderate to Heavy Traffic

 

These Tiles can be used on all Interior Wall Applications, All Interior Countertop applications, all Residential Interior Floors, and all Light Commercial applications, such as Restaurants, Lobbies, etc. This Tile should not be used for Heavy Commercial Use.


PEI 5

 


Heavy Traffic

 

These Tiles can be used on all Interior Wall Applications, All Interior Countertop applications, all Residential Interior Floors, and all Heavy Commercial applications, such as Airports, Shopping Malls, Supermarkets, etc. This Tile is an excellent choice for Industrial applications where extreme durability is required.

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