The appropriate size of tiling trowel to use depends on the size of the tiles you are installing.
Recommended Trowel Sizes by Tile Format
Here's a general guide to help you choose the right trowel size, based on the reference information:
| Tile Format | Trowel Size |
|---|---|
| Mosaics/ Small Format (10x10cm or smaller) | 3-4.5mm |
| Small/Medium Format Wall Tiles (10x10-30x30cm) | 6mm |
| Large Format Tiles (20x20-30x30cm) | 8mm |
Considerations When Choosing a Trowel
- Tile Size: As shown in the table, smaller tiles require smaller notches on the trowel for proper thinset mortar coverage, while larger tiles need larger notches.
- Type of Tile: Some tiles, such as natural stone, may require a different trowel size.
- Desired Mortar Coverage: The trowel's notch size helps control the amount of mortar applied. Aim for adequate coverage, typically 80-90% for dry areas, and 95-100% for wet areas (such as shower floors).
- Substrate: The type of surface you are tiling on may also influence trowel selection. Uneven surfaces may require a larger notch trowel to compensate for any variations.
- Mortar Type: Some mortars may have specific trowel requirements listed on their packaging. Always check the manufacturer’s recommendation.
Example Scenario
- If you are installing 15x15cm wall tiles, a 6mm notched trowel would be suitable.
- For a mosaic project using 2x2cm tiles, you should opt for a 3-4.5mm notched trowel.
- If you are installing 30x30cm tiles, an 8mm trowel is recommended.
Practical Advice
- It is generally best to start with the recommended trowel size and adjust as needed.
- Check the tile periodically after setting it by lifting a tile and observe the back, looking for sufficient coverage.
- Always err on the side of more coverage rather than less.
