Wall tiles vs floor tiles — what is the difference

They look similar but they are engineered differently

The fundamental difference

Floor tiles carry weight — people, furniture, dropped objects. Wall tiles only support their own weight. This drives every other difference between them.

Thickness and strength

Floor tiles are 8-12 mm thick with breaking strengths around 2000N. Wall tiles are 6-8 mm at 600N. Drop a bottle on a wall tile and it chips. On a floor tile, it bounces.

Slip resistance

Floor tiles have textured surfaces rated R9-R13 (shoes) or A-C (barefoot). Bathroom floors should be at least R10 or Class B. Wall tiles are often high-gloss — beautiful vertically, dangerous underfoot.

Can you swap them?

Floor tiles on walls: Yes. They are stronger and more water-resistant. The only downsides are weight (may need stronger adhesive) and cost.

Wall tiles on floors: Never. They crack under traffic, slip when wet, and wear quickly. If labelled "wall only," respect it.

Porcelain vs ceramic

Porcelain is fired hotter (1200-1400°C vs 1000-1100°C), making it denser and harder. Most floor tiles are porcelain. Most wall tiles are ceramic. Both work on walls; only porcelain should go on floors.