While thinset is primarily designed for bonding tiles, it can also be used to level wood floors in certain situations. However, there are important considerations to keep in mind before proceeding with this method.
1. Subfloor Stability:
The first consideration is the stability of the subfloor. Thinset is not a magic solution for fixing major subfloor issues. If your wood subfloor is significantly uneven, rotted, or damaged, simply applying thinset on top will not solve the problem. In such cases, it’s important to address the underlying issues with the subfloor before attempting any leveling techniques.
2. Smoothing Out Minor Imperfections:
If your wood subfloor is in good condition overall but has minor imperfections, thinset can be used to level and smooth the surface. Thinset can fill small gaps, shallow depressions, or slight irregularities, creating a more even surface for the finished flooring. However, it is worth mentioning that thinset should not be relied upon to level a severely uneven wood floor.
3. Loose Floorboards:
Before applying thinset, it’s crucial to ensure that all floorboards are securely fastened to the subfloor. Loose or squeaky floorboards should be fixed beforehand to prevent further movement that could disrupt the leveling process. Nails or screws can be used to secure the floorboards, providing a stable foundation for the thinset application.
4. Choosing the Right Thinset:
When using thinset on wood floors, it’s imperative to select the appropriate type of thinset mortar. Regular thinset may not bond effectively with wood surfaces due to their porous nature. Instead, opt for a modified thinset that is specifically formulated for wood subfloors. These modified thinsets contain polymers that improve adhesion to wood and help prevent cracking or shrinkage during the curing process.
Application Process:
Here is a step-by-step guide for using thinset to level a wood floor:
- Preparation: Clean the wood floor thoroughly, removing any dust, debris, or loose materials.
- Priming: Apply a coat of primer specifically designed for wood surfaces. This will enhance the bonding between the wood and the thinset.
- Thinset Mixing: Follow the manufacturer’s instructions to mix the thinset mortar with water until it reaches a workable consistency.
- Application: Using a trowel, spread a thin, even layer of the thinset over the wood floor. Work in small sections to ensure proper coverage.
- Leveling: Use a straight-edged board or a long, flat leveling tool to smooth out the thinset, aiming for a level surface. This step is crucial to achieve an even floor. Additional thinset can be added in areas that require more leveling.
- Drying Time: Allow the thinset to cure according to the manufacturer’s instructions before proceeding with the next steps of your flooring installation.
Thinset mortar can be used to level wood floors under certain circumstances. While it is not a universal solution for major subfloor issues, thinset can effectively smooth out minor imperfections in a wood floor. By following the proper preparation and application process, selecting the appropriate modified thinset, and ensuring the stability of the subfloor, you can successfully level a wood floor using thinset, providing a solid foundation for your finished flooring materials.