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.

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.