Understanding the Proper Application of Self-Levelling Compound
Typically, self-levelling compound is poured in a thin, uniform layer of approximately 5mm to create a smooth surface suitable for the final floor covering. However, it’s important to note that in practical scenarios, you can pour up to 90% of all self-levelling compounds at depths reaching 12mm, especially when dealing with highly uneven subfloors. The primary function of self-levelling compound is not necessarily to achieve absolute perfection but to eliminate major bumps and dips, providing a level base for subsequent flooring materials.
Applying Self-Levelling Compound Effectively
If your project requires pouring the compound deeper than 12mm over a large area, consider dividing the process into two stages: an initial pour to build up the level, followed by a second finishing pour. This approach not only simplifies the process but also offers a valuable opportunity for practice, especially for beginners. Always consult the manufacturer’s data sheet specific to your chosen product to ensure proper application guidelines are followed.
Enhancing Depth Capabilities with Aggregate Additives
For deeper pours, up to 30mm in a single application, you can enhance the mixture by adding coarse aggregate (gravel). This method requires purchasing suitable gravel from your local builders’ merchant and blending it into the compound according to the manufacturer’s instructions. Such modifications are particularly useful when working on ground floors where large quantities of compound are necessary, and professional assistance might be advisable for optimal results.
Recommended Self-Levelling Compound for Deep Applications
I recommend using the Ultraplan Renovation Levelling Compound, which is water-mixable, cost-effective, and capable of being applied up to 40mm in one go. This fibre-reinforced product ensures greater thickness without cracking, making it ideal for uneven substrates requiring substantial leveling.
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As of 10/01/2024 05:03 pm GMT, this product remains a reliable choice for deep floor leveling tasks.
Estimating the Quantity of Self-Levelling Compound Needed
If you’re unsure about how much compound to prepare, I’ve created a detailed guide that helps you calculate the required amount based on your floor area and the coverage rate. Simply adjust the parameters to match your project specifications for an accurate estimate.
Maximum Depth for Self-Levelling Compounds
The typical maximum depth for self-levelling compounds ranges between 30mm and 40mm, depending on the manufacturer’s specifications. For applications exceeding this thickness, it’s advisable to consult a professional or consider alternative solutions such as a concrete floor screed. Refer to the data sheets from reputable manufacturers like:
- Arditex NA
- Setcrete
- Mapei Ultraplan Renovation Screed 3240
What Is Self-Levelling Compound?
Self-levelling compound, also known as floor screed or levelling mix, is a cement-based blend designed to create a flat, smooth surface on uneven subfloors such as concrete slabs or wooden floors. It is applied in a thin layer before laying the final floor covering, ensuring a stable base.
Why Opt for Self-Levelling Compound?
This product is essential when transforming bumpy, uneven floors into perfectly smooth surfaces. Rigid flooring materials like tiles or hardwood require a level base; otherwise, issues such as cracking, cracking, or movement may occur. Conversely, flexible coverings like carpets can tolerate minor imperfections, making self-levelling an indispensable step in many renovation projects.
Common Questions About Self-Levelling Compound
- Can it be used outdoors? Yes, some formulations are suitable for exterior use, but always verify the product specifications.
- Is it applicable on asphalt? Generally not recommended; consult the manufacturer for specific products.
- Can it be layered? Yes, in certain cases, multiple layers can be applied, following proper curing times.
- What paint is compatible? Use suitable primers and paints designed for cement-based surfaces.
- Should concrete be sealed beforehand? Sealing may be necessary to prevent moisture issues; check product guidelines.
- Is out-of-date compound usable? It’s best to avoid expired products to ensure performance.
- Is a spiked roller needed? Yes, to remove air bubbles and ensure proper bonding.
- Can it be applied over chipboard? Typically not recommended; use appropriate subfloor preparations.
- How long to dry? Curing times vary; refer to the manufacturer’s instructions.
- Can it be used over bitumen? Usually not advisable; check compatibility.
- Does it emit odours? Some formulations may have a smell during curing; ensure proper ventilation.
- Are VOCs present? Modern products aim to minimize VOC content; verify safety data sheets.
- Does it contain ammonia? Typically not; review product details for specific compositions.