When you are putting a new floor in your home or office, the surface underneath needs to be level before you install tiles, vinyl, laminate, or carpet. That is where floor leveling compounds come in. And in Indian construction, you really have two choices: the traditional cement sand screed that masons have been using for decades, or the newer self-leveling concrete compounds that have become popular in modern construction projects. Both get the floor level, but they work very differently and are suited for different situations.
If you are renovating an old apartment where the floor slopes noticeably, or building a new home where you want a perfectly level base for your imported Italian marble, choosing between traditional screed and self-leveling compound is an important decision. Get it right, and your flooring will look great and last long. Get it wrong, and you will have lippage between tiles, hollow sounds underfoot, and a floor that never quite feels right.
What Is Traditional Cement Screed?
Traditional cement screed is a mixture of Portland cement, coarse sand, and water mixed in a ratio of about 1:4 or 1:5. It is applied over the concrete slab in a thickness ranging from 25 mm to 50 mm or more. The screed is spread manually, leveled using screed rails and a straightedge, and then floated and trowelled to a smooth finish. The process is labour-intensive and requires significant skill from the mason. The screed needs to be cured for at least 7 days before any floor covering is installed. During this time, it shrinks slightly and may develop minor cracks, which is normal. The main advantage of traditional screed is its low cost — the materials cost roughly Rs 15 to Rs 25 per sq ft for a 25 mm thick layer. It can also handle large level differences. If your floor is significantly uneven with variations of 25 mm or more, traditional screed can build up to the required thickness economically.
What Is Self-Leveling Concrete?
Self-leveling concrete (also called self-leveling compound or SLC) is a cementitious powder mixture that contains special polymers and flow-enhancing additives. When mixed with water to a specific consistency, it forms a thin, highly flowable liquid that spreads across the floor under its own weight and settles to a perfectly level surface without the need for extensive manual leveling. You pour it on the floor, use a spiked roller to release air bubbles, and let it cure. It self-levels to a tolerance of 1 mm over 2 metres — far flatter than what most masons can achieve with traditional screed. Self-leveling concrete is applied in thicknesses ranging from 3 mm to 30 mm. It dries fast — typically ready for foot traffic in 4 to 6 hours and ready for floor covering in 24 to 48 hours. The downside is the cost. Self-leveling compound costs Rs 60 to Rs 150 per sq ft for a 10 mm thick layer, depending on the brand and specification. For a 30 mm thick layer, the cost multiplies proportionally.
When to Choose Self-Leveling Concrete
Self-leveling concrete is the clear winner for renovation projects. In older apartments and houses, the concrete slab is rarely level. The differences may be 10 mm to 20 mm across a room. With traditional screed, you would need to bring in a thick layer that reduces floor height, takes days to cure, and adds significant weight. With self-leveling compound, you pour a thin layer of 5 mm to 15 mm, it levels itself in minutes, and you can lay your new floor covering the next day. It is also ideal for underfloor heating systems. The thin layer allows heat to transfer efficiently through the floor. For large open areas like showrooms, offices, and commercial spaces where a perfectly flat floor is critical, self-leveling compound delivers consistent results that manual screeding cannot match. It is also the recommended base for vinyl flooring, laminate flooring, and engineered wood, all of which require a dead-flat surface to prevent clicking, lippage, and joint failure.
When to Choose Traditional Screed
Traditional cement screed is still the practical choice for new construction where the slab is reasonably level and you need to achieve general flatness before tiling. If your floor height allows a 25 mm to 40 mm screed layer, traditional screed is significantly cheaper. It is also preferred for large areas where the cost of self-leveling compound would be prohibitive. For a 1,000 sq ft area at 25 mm thickness, traditional screed will cost roughly Rs 15,000 to Rs 25,000 in material. Self-leveling compound for the same area and thickness would cost Rs 60,000 to Rs 1,50,000. Tiles do not require the extreme flatness that vinyl or laminate flooring needs. A good mason with traditional screed can achieve a flatness tolerance of 3 mm over 2 metres, which is perfectly adequate for ceramic and vitrified tiles. Traditional screed is also better for outdoor areas and wet areas because it is more breathable and can handle occasional moisture exposure without trapping it.
Application Method Comparison
Traditional screed is mixed on-site in a concrete mixer or by hand. It is laid in sections between screed rails, compacted, and leveled using a straightedge. The surface is then floated and trowelled. The process takes time — a 500 sq ft room takes a full day for two masons to screed. The screed must be watered and cured for 7 days before tiling. Self-leveling concrete is mixed with water using a drill mixer and poured onto the floor. It spreads naturally and is helped along with a gauge rake for thickness. A spiked roller is used to release any trapped air. A 500 sq ft area can be poured by two people in about 2 hours. It is walkable in 4 to 6 hours and ready for tiling or flooring in 24 to 48 hours. The speed advantage of self-leveling concrete is enormous for time-sensitive projects.
Thickness and Weight Considerations
Traditional screed at 25 mm thickness weighs approximately 50 kg per sq metre. For a 1,000 sq ft area, that is about 4,600 kg of additional load on the slab. Self-leveling concrete at 10 mm thickness weighs about 20 kg per sq metre. The weight difference matters in older buildings where the structural slab may not be designed for additional dead loads. For renovations, self-leveling concrete is always the safer choice because the lower weight reduces the risk of overloading the structure. The thinner profile also means you lose less ceiling height, which is important in apartments with already low ceilings.
Quality of Finish
Self-leveling concrete produces a smoother, flatter surface than traditional screed. The flow characteristics mean the surface is perfectly level in all directions. Traditional screed depends entirely on the mason's skill. A skilled mason can produce a good screed, but even the best mason cannot match the precision of a self-leveling compound. For tile installation, both are acceptable if done well. For vinyl, laminate, engineered wood, or polished concrete, self-leveling is the only reliable choice. The cost difference between the two methods narrows significantly when you factor in the labour savings, speed, and reduced risk of floor covering failure with self-leveling compound.
Conclusion
Choose traditional cement screed for new construction with even slabs, for large areas where budget is the primary concern, for outdoor applications, and when the required thickness exceeds 30 mm. Choose self-leveling concrete for renovations, for thin leveling layers under 20 mm, for vinyl and laminate flooring, for projects with tight timelines, and when perfect flatness is required. Both methods work well in their appropriate applications. The key is to match the method to your specific project requirements rather than defaulting to what your contractor is most comfortable with. If your project needs the precision and speed of self-leveling concrete, the extra cost is a worthwhile investment in the long-term quality of your floor.
At Sterling Technotrade, our Technofloor range includes self-leveling compounds for various thickness requirements. If you need help choosing the right floor leveling solution, contact our technical team for guidance.