Levelling timber floors correctly ensures a stable and even base for tiling. Uneven surfaces can cause tiles to crack, shift, or fail over time. Proper preparation helps create a secure foundation, preventing movement and ensuring long-term durability.
Before levelling a timber floor, secure the surface using the methods outlined in preparing timber backgrounds. Once the floor is stable, check for any uneven areas that need adjustment. Addressing these issues before tiling improves adhesion and prevents structural problems later.
Filling Gaps and Repairing Damaged Timber
Any gaps between timber sheets or floorboards should be filled to create a uniform surface. Replace worn or damaged boards before applying any levelling compound. A well-prepared floor ensures that the levelling process produces a smooth and reliable result.
Using Levelling Compound and Tile Backer Boards
For levelling timber floors, a levelling compound provides an effective solution. Levelling compounds generally range from a feather edge up to 12mm thick, depending on the floor’s condition. Ensure the compound cures thoroughly before moving to the next step.
Once cured, install a 10mm tilebacker board over the surface to enhance stability. Secure the boards with screws, ensuring each fixing goes through the levelling compound and into the timber. When using tile backer boards, always use compatible washers with the screws to prevent tearing and create a firm hold. Keep screw fixings no more than 300mm apart, paying extra attention to bracing corners and edges.
Never apply levelling compound directly onto timber without covering it with an overlay of tile backer board, as this can lead to adhesion failure and movement issues.
Levelling Timber Floors with a Detachment Membrane
For a different approach, a detachment membrane provides a flexible and effective solution. Once the timber floor is secured, attach a detachment membrane using a vinyl floor tile adhesive or recommended alternative. Apply the adhesive with a 2x6mm vinyl notch trowel, ensuring complete coverage.
Seal the detachment membrane joins by applying a jointing tape with a flexible adhesive. Unlike tile backer boards, detachment membranes do not require levelling compound directly on the timber floor. Instead, apply levelling compound directly onto the detachment membrane to create a level surface.
Smoothing the Surface Before Tiling
Most detachment membranes requires backfilling before tiles can be installed. Depending on the material used, the following amounts should be factored into quantity calculations:
- Adhesive: Approximately 2 kilos per square metre
- Levelling compound: Approximately 2.6 kilos per square metre
Final Considerations for Levelling Timber Floors
Choosing the right levelling method depends on the floor’s condition and the materials being installed. Whether using tile backer boards or a detachment membrane, ensuring a solid and level base is essential for a successful tiling project.
For expert advice on levelling timber floors and selecting the best method for your project, contact us today.
