Glazed products perform according to the hardness of their glaze. This hardness is determined by the manufacturer and rated using a PEI scale (Porcelain Enamel Institute). This PEI rating will determine the proper usage of each product.
| N/A | Natural products are not glazed and are therefore not rated. |
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PEI I |
Tiles suitable for interior wall application. |
| PEI II | Tiles suitable for residential bathrooms where softer footwear is worn. |
| PEI III | Tiles suited to general residential traffic, except kitchens, entrance halls, and other areas subjected to continuous heavy use. |
| PEI IV | Tiles suited for all residential and light to medium commercial areas. |
| PEI V+ | Tiles suitable for heavy traffic and wet areas where safety and maximum performance are a major concern such as exterior hallways, food service, salad bars, building entrances, around swimming pools or shopping centers. |
NOTE: All tiles are suitable for interior wall use.