Ceramic And Porcelain Tiles Are Not The Same Purchase

Tiles are sold together and described together, but ceramic and porcelain are different products. The distinction is density, and almost everything else follows from it.

The difference is made in the kiln

Both begin as clay, but porcelain uses a finer body fired at a higher temperature for longer. The result is a tile with very little open pore structure.

Standard ceramic remains more porous. It absorbs a measurable amount of water, which is acceptable in many locations and disqualifying in others.

Water absorption is the property that classification systems actually test for, and it is the honest way to tell the two apart when the labelling is vague.

Porosity decides where a tile can live

A porous tile in a location that freezes will hold water, and water expands as it turns to ice. The tile spalls, usually at the edges, and there is no repair.

Externally, and on any threshold that gets wet and cold, a dense tile is the only sensible choice. Indoors in dry rooms, porosity matters much less.

Wet rooms sit in between. The tile itself is rarely the weak point there; the joints and the substrate behind them usually are.

Wear behaves differently in the two bodies

Most ceramic tiles are a coloured body under a glaze, so a chip or a deep scratch exposes a different colour underneath and shows clearly.

Full-body porcelain carries its colour through the whole thickness, so damage is far less visible. Glazed porcelain does not, and is often mistaken for the full-body kind.

For floors in heavy use this distinction is worth more than the surface pattern, because it determines how the floor looks after several years rather than on the day it is laid.

Density makes porcelain harder to work

The same hardness that resists wear resists cutting. Porcelain needs better blades, slower cuts and more patience, and it chips at the edge if rushed.

Drilling it for a fixing is a specialist operation rather than a casual one, which matters if anything will later be mounted on a tiled wall.

Labour costs reflect this, so the difference between the two materials is not only the price per square metre.

Weight and substrate are the last constraint

Dense tiles are heavy, and large formats concentrate that weight over a small number of fixings and adhesive beds.

Timber floors and stud walls have limits on what they can carry without deflecting, and a floor that flexes will crack the joints long before it cracks the tile.