Self-leveling Concrete Over Adhesive

However, the use of self-leveling concrete over adhesive has become a topic of debate in the construction industry. While some experts argue that self-leveling concrete can be successfully applied over adhesive, others contend that the adhesive may compromise the integrity of the self-leveling concrete and result in uneven floors.

This essay will explore the advantages and disadvantages of using self-leveling concrete over adhesive, and examine the best practices for applying this material in construction projects. By analyzing these factors, we can gain a deeper understanding of how to achieve optimal results when using self-leveling concrete over adhesive in building and renovation projects.

Advantages and disadvantages of removing adhesive

The method of removing adhesive before applying a self-leveling compound offers a number of advantages and disadvantages that should be considered before choosing this method.

One of the main advantages of removing the adhesive is that it creates a better bond between the substrate and the self-leveling compound. When the adhesive is removed, the substrate is exposed, allowing the self-leveling compound to bond directly to the substrate. This can lead to a stronger and more stable flooring installation.

Another advantage of removing adhesive is that it allows for a thicker application of self-leveling compound. When the adhesive is left in place, the self-leveling compound is limited in the thickness it can be applied.

This is because the self-leveling compound needs to be able to bond to the substrate, and if the adhesive is too thick, the self-leveling compound may not be able to create a strong bond. By removing the adhesive, the self-leveling compound can be applied in a thicker layer, allowing for a more level surface.

Removing the adhesive also eliminates the risk of it failing in the future. If the adhesive is left in place, it may deteriorate over time, leading to problems with the flooring installation. By removing the adhesive, this risk is eliminated, providing a more stable and durable base for the flooring.

Disadvantages of removing adhesive

Time-consuming:

Removing adhesive can be a time-consuming process, especially if the adhesive is stubborn or difficult to remove. This can result in delays in the installation process.

Messy:

Removing adhesive can also be a messy process, as it can create a lot of dust and debris. This can make it difficult to keep the work area clean and can create a hazard for workers.

Costly: 

Removing adhesive can also be a costly process, especially if specialized equipment or materials are required. This can increase the overall cost of the installation process.

Additionally, there is the potential for damage to the substrate during the removal process. Careful attention should be paid to the condition of the substrate before, during, and after the adhesive removal process.

Alternative method: Removing adhesive before applying self-leveling compound

Steps for removing adhesive

The following steps provide a general overview of the process for removing adhesive before applying self-leveling compound. It is important to note that the specific steps and materials required may vary depending on the type of adhesive and substrate.

Test the adhesive for asbestos and lead

Before beginning the adhesive removal process, it is important to test the adhesive for asbestos and lead. These materials can be hazardous to health, and special precautions may be required for their removal. Testing can be done by a qualified professional.

Gather necessary tools and materials

The tools and materials required for adhesive removal may include:

• Protective gear (gloves, goggles, respirator)
• Adhesive remover
• Scraper
• Sandpaper or abrasive pad
• Bucket
• Sponge or rag
• Water
• Prepare the work area

The work area should be prepared by covering surrounding surfaces and furniture with plastic sheeting or drop cloths. Ventilation should be adequate, and any electrical outlets or switches should be turned off.

Apply adhesive remover

The adhesive remover should be applied according to the manufacturer’s instructions. It is important to use a remover that is appropriate for the type of adhesive being removed and the substrate being treated. The adhesive remover may need to be applied in several coats, and it may take several hours for the adhesive to soften.

Scrape off the adhesive

Once the adhesive has softened, it can be scraped off using a scraper. It is important to work carefully and slowly, being careful not to damage the substrate. The adhesive should be scraped off as much as possible.

Clean the surface

After the adhesive has been removed, the surface should be cleaned using water and a sponge or rag. Any remaining adhesive should be removed, and the surface should be allowed to dry completely.

Inspect the surface for damage

The surface should be inspected for any damage that may have occurred during the adhesive removal process. Any damage should be repaired before proceeding to the next step.

Preparing the surface for self-leveling compound after removing adhesive

After the adhesive has been removed, the surface should be properly prepared before applying the self-leveling compound. The following steps should be taken to ensure that the surface is clean and ready for the self-leveling compound:

Clean the surface

The surface should be thoroughly cleaned using a vacuum or broom to remove any debris. Any remaining adhesive residue should be removed using a scraper or sandpaper. A damp cloth can be used to wipe the surface clean, and any excess moisture should be removed using a dry cloth.

Repair any damage

Any damage to the surface should be repaired before applying the self-leveling compound. This may include filling in cracks or holes with an appropriate filler or patching compound. The repaired area should be allowed to dry completely before proceeding.

Prime the surface

The surface should be primed with a suitable primer before applying the self-leveling compound. The primer helps to improve adhesion and can also help to seal the surface. The type of primer used will depend on the substrate and self-leveling compound being used.

Level the surface

Before applying the self-leveling compound, any high spots or uneven areas should be leveled. This can be done using a self-leveling underlayment or a patching compound. The underlayment or patching compound should be allowed to dry completely before proceeding.

Apply the self-leveling compound

The self-leveling compound can now be applied to the prepared surface. The self-leveling compound should be mixed according to the manufacturer’s instructions and applied using a notched trowel or gauge rake. The compound should be spread evenly over the surface, and any excess should be removed.

Allow the compound to dry

The self-leveling compound should be allowed to dry completely before any flooring is installed. The drying time will depend on the manufacturer’s instructions and the thickness of the applied compound.

By following these steps, the surface will be properly prepared for the self-leveling compound. This will ensure that the self-leveling compound adheres properly to the substrate and provides a smooth and level surface for the installation of flooring.

Things to check before applying a self-leveling compound over an adhesive

When applying a self-leveling compound over an adhesive, it is important to determine the suitability of the adhesive for the self-leveling compound. Not all adhesives are suitable for use with self-leveling compounds, and using an incompatible adhesive can result in a failed installation.

Determining the suitability of the adhesive

The adhesive should be checked to ensure that it is compatible with the self-leveling compound. The manufacturer of the self-leveling compound should be consulted to determine which adhesives are suitable for use with their product. In general, water-based adhesives are more compatible with self-leveling compounds than solvent-based adhesives.

Advantages of using a self-leveling compound over an adhesive

Using a self-leveling compound over an adhesive offers several advantages:

Provides a smooth and level surface: 

Self-leveling compounds are designed to create a smooth, level surface, which can help hide imperfections in the substrate.

Resolves unevenness and imperfections:

Self-leveling compounds can be used to fill in low spots and level out uneven areas, which can help create a more stable surface for the installation of flooring.

Creates a stable and durable base for flooring installation: 

Self-leveling compounds can help to create a more stable and durable base for the installation of flooring, which can increase the longevity of the flooring.

Increases longevity of the flooring: 

By providing a stable and level base, self-leveling compounds can help to prevent the development of cracks or other damage in the flooring, which can help to increase its longevity.