While thinset is commonly used as a subfloor leveling agent, it is generally not recommended as a sufficient surface for installing laminate flooring. Thinset is primarily designed to bond tiles, not laminate planks. It is not suitable for the unique installation requirements of laminate flooring, where the planks need to interlock and move freely.
Issues with Installing Laminate Flooring Over Thinset
If laminate flooring is installed directly over thinset, several issues can arise:
- Lack of Stability: Thinset bonds tiles to the substrate, creating a rigid and immovable surface. This rigidity conflicts with the floating installation method of laminate flooring, which requires flexibility. Without this flexibility, the laminate planks may not be able to expand and contract properly, leading to buckling or warping.
- Uneven Surface: Thinset is not intended to create a perfectly flat surface. It is mainly used to level out minor irregularities in the subfloor to ensure the tiles lay flat. However, when installing laminate flooring, a truly flat surface is crucial to prevent gaps or unevenness between the planks. Using thinset as a subfloor may result in an uneven surface, compromising the installation and aesthetics of the laminate.
- Unsuitable Material: Thinset is a mixture of cement, which can be abrasive and rough in texture. This can degrade the durability and longevity of the laminate floor, potentially causing scratches or damage to the surface over time.
Alternative Solutions
If your subfloor requires leveling or repair before installing laminate flooring, it is recommended to use suitable methods and materials instead of thinset. Some alternative solutions include:
- Self-Leveling Underlayment: Self-leveling compounds are specifically designed to level out uneven subfloors and provide a smooth surface. They are easy to apply and quick to dry, ensuring a proper base for laminate flooring installation.
- Plywood Subfloor: If there are significant irregularities or damage to the existing subfloor, adding a layer of plywood can provide a stable and flat surface. Make sure to properly secure the plywood to the subfloor using screws or nails, following the manufacturer’s guidelines.
- Subfloor Replacement: In extreme cases where the subfloor is severely damaged or uneven, it may be necessary to replace the entire subfloor. This ensures a stable and suitable surface for laminate flooring installation.
Installing laminate flooring over thinset is generally not recommended. Thinset is designed for tile installation, not laminate flooring, and can lead to stability and surface issues. It is essential to properly prepare the subfloor using suitable methods and materials to ensure a successful and long-lasting laminate flooring installation. Always consult with a professional or follow the manufacturer’s guidelines for the best results.