Exploring the Flexibility of Self-Levelling Compounds
Self-levelling compounds inherently possess a certain degree of flexibility, which largely depends on the specific type you select for your project. There are three primary categories of self-levelling compounds, each with distinct characteristics concerning flexibility and suitability for various applications:
- Latex-based self-levelling compounds – Known for their high flexibility, making them ideal for dynamic or moving substrates.
- Water-mixed self-levelling compounds – Generally less flexible, suitable for stable, solid substrates without significant movement.
- Fibre-reinforced, water-mixed self-levelling compounds – Offer increased flexibility due to added fibres, suitable for surfaces that require a bit more give.
When choosing a self-levelling compound, it’s crucial to consider the specific demands of your project. The key question to ask yourself is: how much flexibility does your application require?
Advantages of Latex-based Self-Levelling Compounds
If you plan to apply self-levelling compounds on upper floors or suspended timber subfloors, opting for a latex-based self-levelling compound is highly recommended. These compounds are designed to accommodate slight movements in the substrate, which are common in timber structures. Timber floors, especially those on the first floor or above, tend to have minimal but inevitable flexing due to their natural properties. Using a highly flexible, latex-infused product helps prevent cracks and ensures a durable, long-lasting finish.
In addition, applying a suitable underlayment or plyboarding over timber floors can further reduce movement and improve stability. For practical guidance, refer to our comprehensive guide: “How to Ply over Floorboards”.
For example, one popular latex-based self-levelling compound is the Easy Spread Ultra Level 2. It comes pre-mixed, ready to pour, and costs approximately £19.50. This product is complemented by a tub of latex, which when combined, enhances flexibility and ease of application. Buy it now on Amazon. We earn a commission if you make a purchase through this link, supporting our ongoing projects at the Bloke Cave.
Many users find that latex-mixed self-levelling compounds are easier to spread evenly across a room, resulting in a professional-looking finish—even for those new to such applications.
Water-mixed Self-Levelling Compounds: Suitability and Limitations
For larger, ground-floor areas, water-mixed self-levelling compounds can be an effective choice. These products are generally less flexible compared to their latex counterparts but are perfectly suitable for stable, non-moving substrates like concrete slabs. They provide a solid, level surface suitable for a variety of finishes.
However, for applications where some substrate movement is anticipated, I recommend sticking with latex-based compounds, as their inherent flexibility reduces the risk of cracking over time. Additionally, latex self-levelling compounds tend to find their natural level more smoothly and require less manual intervention, making them ideal for DIY projects or less experienced users.
In summary, selecting the right self-levelling compound depends on the specific conditions of your subfloor. Consider flexibility requirements, substrate stability, and application size to ensure optimal results.