Tile Trim Sizes Explained – Aluminium Tile Trims (UK)
Choosing the right aluminium tile trim is critical for a clean, professional finish. UK tiles come in several common thicknesses, and matching the trim correctly prevents gaps, overhang, and installation issues. This guide explains the most common tile sizes, how to measure your tiles, and which aluminium trims work best.
Why Tile Trim Size Matters
- Prevents overhang or visible gaps
- Ensures corners (internal/external) fit neatly
- Protects tiles from chipping or damage
For more detailed instructions, see our Installing Aluminium Tile Trims Step-by-Step guide.
Most Common Tile Thicknesses in the UK
In the UK, the most frequently used tile thicknesses are 8mm, 10mm, and 12mm. Each thickness requires a trim that matches or slightly exceeds the tile edge for a perfect finish.
| Tile Thickness | Recommended Aluminium Trim | Notes / Use Case |
|---|---|---|
| 8mm | 8mm aluminium trim | Small wall tiles, bathrooms |
| 10mm | 10mm aluminium trim | Standard wall & floor tiles |
| 12mm | 12mm aluminium trim | Large format tiles, porcelain |
| 15mm | 15mm aluminium trim | Less common, commercial applications |
How to Choose the Right Trim for Your Tile
- Measure the thickest part of the tile
- Consider grout lines
- Match profile type (square, rounded, L-shaped)
Check our related use-case pages:Wet Rooms,
Tips for Measuring Tiles Before Buying Trims
- Use a digital caliper or ruler
- Measure multiple tiles for consistency
- Note corners (internal/external)
Common Mistakes to Avoid
- Trim too small → overhang/poor finish
- Trim too large → visible gap
- Ignoring corner type
- Forgetting material/finish suitability (bathroom vs wet room)