Can You Remove Self-Levelling Compound Once It Has Fully Cured?
While it may seem challenging, it is entirely feasible to remove self-levelling compound after it has set, provided you are prepared to put in the necessary effort. With sufficient diligence and the right tools, removal is possible. Therefore, the straightforward answer is Yes.
In this comprehensive guide, I will share essential insights to help you decide whether removal is appropriate for your project. I assume you are here because you’ve poured self-levelling compound and are dissatisfied with the final outcome. The best initial step is to identify high spots or ridges and grind them down. Afterward, a thin re-pour can produce a smooth and level surface. Since self-levelling compounds adhere strongly to substrates, they can be quite difficult to remove entirely. They bond so effectively to concrete that attempting to scrape or chip them off often results in pulling up portions of the substrate itself.
The primary reasons for removing self-levelling compound include situations where you need to lower the floor level or when the compound has not adhered properly. Removing it requires specialized equipment, such as an SDS drill fitted with a chisel attachment, and involves significant effort to chip away all remnants. This process entails collecting and disposing of the old compound carefully.
In most cases, the recommended approach is to grind down any uneven areas and re-pour the compound, which is far less labor-intensive and produces less dust. Complete removal is rarely necessary unless specific issues demand it. If the existing layer adheres well and floor height is not a concern, simply reapplying over the old layer is a practical solution. This method avoids the mess and hassle of mechanical removal and ensures a seamless finish.
Reasons for Considering Removal of Self-Levelling Compound
Typically, we aim to preserve the self-levelling compound because of its excellent adhesion properties. However, there are certain circumstances that justify removal:
- Poor Application Quality: If the initial application was uneven, resulting in ridges or bumps, removal followed by a fresh pour can achieve a more level surface.
- Adhesion Failure: When the compound has failed to stick to the substrate properly, it compromises the integrity of the surface. Removing and reapplying can rectify this issue.
- Floor Height Concerns: If raising the floor height is problematic, removal allows for better control over the final level, although it may involve more effort.
- Surface Finish Discrepancies: If the surface finish does not meet expectations, removal and replacement with a different material may be necessary.
- Remodelling Projects: During renovations, removing existing self-levelling layers can facilitate the installation of new flooring or structural changes.
- Levelling Defects: Uneven application or sinking areas can be corrected by removal and reapplication to restore a consistent, level surface.
Removing Wet Self-Levelling Compound
This section addresses the removal process when the compound is still wet. Acting swiftly is crucial because the compound begins setting shortly after application.
Removing Fresh Self-Levelling Compound
When the compound is still in a semi-liquid state, removal is comparatively easier. Use a sturdy scraper or trowel to lift as much of the wet material as possible, working quickly to prevent it from hardening. Carefully scrape the surface, transferring excess compound into a bucket, and wipe the scraper clean regularly to maintain efficiency.
After removing the excess, thoroughly clean the surface with a damp cloth or mop to eliminate dust and debris, ensuring a clean base for any subsequent application. This process is less messy than dealing with dried material but still requires prompt action and safety precautions, such as gloves and eye protection.
If the wet compound begins to dry, removal becomes more challenging. In such cases, mechanical chiselling with a hammer and chisel or an SDS drill equipped with a chisel attachment becomes necessary. For large areas, renting professional equipment might be advisable to expedite the process.
Removing Dried Self-Levelling Compound
Once fully cured, the removal process is significantly more complex and requires specialized tools. The main methods involve mechanical breaking and grinding techniques.
Steps for Removing Cured Self-Levelling Compound
- Gather Your Equipment: Prepare a hammer, cold chisel, or an SDS drill with a chisel attachment. Safety gear such as gloves, a dust mask, and protective clothing are highly recommended.
- Chipping Away: Carefully use the SDS drill or hand tools to chip away the surface layer, working slowly to prevent damage to underlying structures. Patience is essential.
- Grinding the Surface: For residual bits, employ a diamond disk attached to an angle grinder connected to a dust extraction system. This step ensures a smoother surface and removes stubborn fragments.
- Thorough Cleaning: Vacuum the entire area to remove all dust and debris. Inspect the floor to determine if additional grinding or chipping is necessary. Repeat steps as needed for complete removal.
Note that removing dried self-levelling compound generates a considerable amount of dust, so proper safety measures, including adequate ventilation and protective gear, are vital. The process demands experience and appropriate equipment, but with patience and care, it can be executed successfully by anyone determined to restore their floor.