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Understanding Screed: A Comprehensive Guide to Floor Levelling in Ground Works

Screed is a vital component in ground works, used to level and smooth concrete or flooring surfaces before final finishing. In this guide, we’ll delve into what screed is, how to screed a floor, the different types of screed and the step-by-step process of laying screed.

What is Screed?

Screed is a thin layer of material, typically made of cement, sand, and water, applied to concrete or flooring surfaces to create a smooth, level finish. It acts as a base for tiles, carpet, or other floor coverings and helps to improve the overall appearance and durability of the floor.

How to Screed a Floor: Step-by-Step Guide

  1. Surface Preparation: Before applying screed, ensure that the concrete or flooring surface is clean, dry, and free from dust, debris, and contaminants. Use a broom or vacuum cleaner to remove any loose particles and ensure a smooth base for the screed.
  2. Mixing the Screed: Prepare the screed mixture according to the manufacturer’s instructions, ensuring the correct ratio of cement, sand, and water. Use a concrete mixer or mixing paddle to blend the ingredients thoroughly until you achieve a smooth, lump-free consistency.
  3. Applying the Screed: Pour the screed mixture onto the prepared surface in small sections, starting from one end and working your way towards the opposite end. Use a screeding board or straight edge to spread the screed evenly across the surface, maintaining a consistent thickness.
  4. Smoothing and Levelling: Once the screed is applied, use a screeding tool or trowel to smooth and level the surface, removing any excess material and filling in any low spots or depressions. Work quickly and methodically to ensure a uniform finish across the entire area.
  5. Finishing and Curing: After screeding, allow the surface to cure and harden according to the manufacturer’s recommendations. Avoid walking or placing heavy loads on the screed during the curing process to prevent damage or uneven settling.

Different Types of Screed:

  1. Traditional Screed: Traditional screed, also known as sand and cement screed, is a mixture of cement, sand, and water applied directly to the substrate. It is commonly used for domestic and commercial flooring applications and provides a durable and cost-effective solution.
  2. Self-Leveling Screed: Self-leveling screed is a pre-mixed, cement-based product that flows easily and levels itself when poured onto the substrate. It is ideal for uneven or irregular surfaces and provides a smooth, level finish with minimal effort.
  3. Polymer Modified Screed: Polymer modified screed contains additives that improve adhesion, flexibility, and durability. It is suitable for areas subject to heavy traffic, temperature fluctuations, or moisture exposure, providing enhanced performance and longevity.

Conclusion: Screed plays a crucial role in ground works, providing a smooth, level surface for concrete and flooring applications. By understanding the principles of screeding and the different types of screed available, construction professionals can achieve optimal results in their projects.

If you’re planning a ground works project and need expert assistance with screeding, contact Viv Construct Group today. Our experienced team specializes in floor levelling and can provide customized solutions to meet your specific needs. Let us help you achieve a smooth, level finish for your next project.