Notched Tile Trowels: Square-Notch vs. V-Notch
Understanding Notched Tile Trowels
Notched tile trowels are essential tools for applying thinset mortar to surfaces when installing tiles. Their unique feature, notches, plays a crucial role in ensuring proper mortar application and tile adhesion.
Types of Notched Tile Trowels
There are two main types of notched tile trowels:
- Square-Notch Trowels: These have square or rectangular notches that create flat mortar rows with spaces in between. They dispense more mortar and are used for floor tiles and tiles over 2 inches square.
- V-Notch Trowels: These have a continuous zig-zag pattern with points. They dispense less mortar and are used for smaller tiles (under 2 inches square), wall tiles, and ceiling tiles.
Choosing the Right Notch Size
The notch size of the trowel should be chosen based on the tile size and installation location. Larger tiles and floor tiles require larger notch sizes. Your tile supplier can provide guidance on the appropriate size for your project.
How to Use Notched Trowels
1. Prepare the Substrate:
- Apply thinset mortar to the substrate up to the containment line using a margin trowel or the notched trowel itself.
- Use the flat edge of the notched trowel to key in the thinset, spreading it evenly across the surface.
2. Set Tile Trowel on Edge:
- Hold the handle of the trowel and rest the notched edge on the substrate at a 45-degree angle.
3. Draw Trowel:
- Draw the trowel towards you or sideways in long, straight lines.
- Avoid leaving excess mortar clumps and smooth out any high spots.
Tips for Using Notched Trowels
- Hold the trowel at an angle, never flat.
- Pull the trowel towards you, not away.
- Keep the trowel clean and dry between uses to prevent rusting.
- If the trowel is hard to move, adjust the thinset consistency or add water if it’s too dry.
- Wear waterproof gloves for better grip.
Preventing Air Pockets and Ensuring Proper Mortar Coverage
Proper mortar coverage is crucial for tile adhesion. When the trowel is used correctly, it creates spaces between the mortar lines, allowing air to escape as the tile is pressed into place. This prevents air pockets that can affect the tile’s flatness and adherence.
To ensure proper mortar coverage, aim for at least 80% coverage for tiles in dry locations and 95% coverage for tiles in wet locations. Additionally, all corners of each tile must have mortar coverage.
Maintenance and Care of Trowels
Regular maintenance is essential for keeping your notched trowels in good condition:
- Rinse the trowel thoroughly with water after each use.
- Wipe it dry with a clean cloth to prevent rusting.
- Store the trowel in a dry place.
- If the trowel becomes rusty, use a wire brush to remove the rust and apply a thin coat of oil to protect it.
By following these guidelines, you can effectively use notched tile trowels to ensure proper tile installation and achieve optimal results.