Preparing a subfloor for new flooring is a critical step in any renovation or construction project. Self-levelling compound is a popular choice for creating a smooth, even surface, but how long does it take to dry before you can lay tiles, timber, or vinyl? In this guide, we’ll break down everything you need to know about self-levelling compound drying times, factors that affect curing, and expert tips to ensure a flawless finish. Whether you’re a DIY enthusiast or a professional, this article will help you plan your flooring installation with confidence. Follow us on X at @ElymentGroup or visit elyment.com.au for more flooring solutions. What Is Self-Levelling Compound? Self-levelling compound is a cement-based mixture that flows and spreads to create a flat, smooth surface on uneven subfloors. It’s ideal for preparing concrete, timber, or tiled subfloors for flooring materials like tiles, laminate, vinyl, or hardwood. The compound uses gravity to level itself, making it easier to achieve a professional finish without extensive manual work. How Long Does Self-Levelling Compound Take to Dry? Drying times for self-levelling compound vary based on the product, thickness, and environmental conditions. Here’s a general breakdown: Standard Cement-Based Compounds: Typically take 24–48 hours to dry enough for foot traffic and 3–7 days before laying non-waterproof flooring. Fast-Setting Compounds: Dry in 4–6 hours for walking and 12–16 hours for flooring installation, ideal for quick renovations. Gypsum-Based Compounds: May take up to 72 hours to dry, depending on thickness and humidity. Thin Layers (1–5 mm): Dry in 4–8 hours for standard compounds. Medium Layers (5–10 mm): Require about 24 hours. Thick Layers (>10 mm): Can take 48 hours or more to fully cure. Always check the manufacturer’s instructions for specific drying times, as products like Mapei’s Ultraplan or Cemimax DL55 may have unique curing profiles. Factors Affecting Drying Time Several factors influence how quickly self-levelling compound dries. Understanding these can help you plan your project effectively: Thickness of Application: Thicker layers take longer to cure. Most compounds are applied at 3–6 mm, but some, like Cemimax DL55, can be poured up to 75 mm in one application. Ambient Temperature: Ideal drying occurs between 18–25°C. Cold temperatures slow curing, while excessive heat can cause cracking. Humidity Levels: High humidity delays drying by slowing moisture evaporation. Aim for relative humidity below 75%. Ventilation: Good airflow, such as open windows or fans, speeds up drying but avoid strong drafts that may cause uneven curing. Subfloor Material: Porous subfloors like concrete may absorb moisture from the compound, affecting drying time. Priming is essential to prevent this. Expert Tips for Faster and Better Drying To achieve optimal results and avoid common pitfalls, follow these expert tips: Prepare the Subfloor: Clean, sweep, and vacuum the subfloor to remove dust, debris, and contaminants. Use a primer to enhance adhesion and prevent moisture issues. Test for Moisture: Use a moisture meter to ensure the subfloor has less than 5.5% moisture content before applying the compound. Mix Correctly: Follow the manufacturer’s water-to-powder ratio. Overwatering can extend drying time and weaken the compound. Work Quickly: Self-levelling compound sets fast (10–20 minutes), so pour and spread it promptly using a trowel or spiked roller. Protect the Surface: Avoid foot traffic and drafts during the initial 2–6 hours of curing to prevent cracking or uneven drying. Adhere to Australian Standards: Ensure the subfloor meets Australian tolerances (e.g., 10 mm maximum deviation within a room) for a successful installation. For more detailed guidance, check out our flooring preparation guides. Common Mistakes to Avoid Even small errors can lead to costly delays or flooring failures. Here are pitfalls to watch out for: Skipping Primer: Without primer, the compound may not adhere properly, leading to cracking or debonding. Applying Over Uneven Floors: If the subfloor has deviations greater than 5 mm, consider alternative levelling methods. Installing Flooring Too Soon: Laying flooring before the compound is fully cured can trap moisture, causing mould or adhesive failure. Ignoring Manufacturer Instructions: Each product has specific mixing and curing requirements—follow them to the letter. Key Takeaways Self-levelling compound drying times range from 4–72 hours, depending on the type, thickness, and environmental conditions. Fast-setting compounds allow flooring installation in as little as 12–16 hours, while standard compounds may need 3–7 days. Proper subfloor preparation, priming, and controlled drying conditions are crucial for success. Always follow manufacturer guidelines and Australian standards for best results. Hire a professional for complex projects to ensure compliance and a flawless finish. Next Steps for Your Flooring Project Ready to start your flooring project? Whether you’re levelling a subfloor or installing new flooring, proper planning and execution are key. For expert advice or professional services, contact the team at Elyment Group. Visit elyment.com.au or follow us on X at @ElymentGroup for the latest flooring tips and solutions. Inspired by insights from FloorVenue’s Ultimate Guide to Self-Levelling Compound. 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