Self Levelling Compound

Key Features of Self-Levelling Compounds

1. Ease of Application: The compound is typically a mix of powder and liquid that, when combined, forms a slurry. Once applied, the mixture flows and spreads across the surface, filling in low spots and levelling out the floor.

2. Fast Drying: Most self-levelling compounds dry relatively quickly, often within a few hours, allowing the next layer of flooring or treatment to be applied soon after.

3. Smooth Finish: These compounds are designed to leave a smooth, even surface, which is crucial for ensuring the longevity and performance of subsequent flooring layers.

4. Thickness Range: They can be applied in varying thicknesses, typically between 1/16 inch to several inches, depending on the product. Some compounds are designed for light smoothing, while others can fill in deeper voids or gaps.

Types of Self-Levelling Compounds

1. Cement-Based: These are the most common type and are made from a blend of Portland cement, aggregates, and other additives. They are often used for both residential and commercial applications, particularly on concrete or plywood subfloors.

2. Gypsum-Based: These are smoother and more lightweight than cement-based options but may not be suitable for high-moisture areas. They’re often used in interior spaces, particularly in commercial settings.

3. Polymer-Modified: These compounds are enhanced with polymer resins for improved bonding and flexibility. They are especially useful for surfaces that require higher strength or moisture resistance.

4. Rapid-Set: Some self-levelling compounds are formulated for faster setting times. These are ideal for applications that need to be completed quickly, such as in commercial or high-traffic areas.

Applications of Self-Levelling Compounds

• Subfloor Repair: Filling in cracks, gaps, or uneven areas in concrete, wood, or tile subfloors before installing new flooring.

• Smoothing Concrete Floors: Making a rough or uneven concrete floor smooth enough for further treatment or flooring installation.

• Moisture Barrier: Some self-levelling compounds are moisture-resistant and can serve as a moisture barrier for floors in damp environments (e.g., basements).

Application Process

1. Preparation: Clean the floor thoroughly to remove dust, dirt, grease, or other contaminants. Any existing floor coverings may need to be removed.

2. Priming: A bonding primer may be required, especially for porous surfaces or areas that are difficult to adhere to. The primer helps improve adhesion between the compound and the subfloor.

3. Mixing: Self-levelling compounds come in a powder form that needs to be mixed with water (or sometimes a liquid additive) to create a smooth, pourable consistency. Follow the manufacturer’s instructions carefully for proper mixing.

4. Pouring: Once mixed, the compound is poured onto the floor and allowed to spread out naturally. You may need to use a trowel or a smoothing tool to guide it into place, but it should self-level as it spreads.

5. Drying and Curing: Allow the compound to dry and cure as per the manufacturer’s recommendations. This process can range from a few hours to several days, depending on the type of compound and thickness applied.

Advantages of Self-Levelling Compounds

• Time-Saving: They eliminate the need for extensive manual levelling or smoothing.

• Durability: When applied correctly, they provide a solid, long-lasting base for other floor coverings.

• Flexibility: Can be used on a wide range of surfaces, including concrete, wood, and existing tile floors.

Disadvantages

• Surface Preparation: Proper preparation and priming of the floor are crucial for good adhesion.

• Thickness Limits: Self-levelling compounds are not meant to be used for large or deep repairs (usually over 1-2 inches thick).

• Cost: Some self-levelling compounds, particularly the high-performance or fast-setting varieties, can be more expensive than traditional underlayment materials.

If you’re planning a floor levelling project, it’s important to choose the right type of self-levelling compound based on your subfloor material, thickness needs, and the specific flooring you’re installing.