PEI is a term homeowners may see while comparing glazed floor tiles. It relates to resistance to surface wear under a particular classification system. It is useful information, but it is not a complete answer to whether a tile is right for a bathroom.
PEI is about wear, not every kind of safety
Wear resistance does not tell you everything about slip behaviour when a surface is wet. It also does not describe drainage, falls, cleaning, surface texture or whether a product is intended for a particular shower application.
Those questions need their own product information.
Location changes the requirement
A lightly used guest bathroom, a family bathroom, a rental property and a commercial washroom may experience different traffic and cleaning routines. A tile chosen for a wall or low-traffic area should not automatically be moved to a heavily used floor because the colour matches.
The application should be agreed with the supplier and manufacturer’s guidance.
Finish still changes how the room lives
A durable surface can be impractical if it is difficult to clean or visually shows every mark under strong bathroom lighting. The tile’s look, texture, joint, maintenance and intended use should be assessed together.
Good specification is about matching the product to the room it will live in.
Ask the complete question
When selecting a bathroom floor tile, ask about wear classification, wet-use suitability, slip information, finish, maintenance, format and the installation system. PEI may be one part of that conversation, but it should not be used as shorthand for overall performance.
Read why R10 is not the only shower-floor question, or see our KZN bathroom tile selection guide.