The structural screed uses a wide range of materials to complete projects. It is important to understand what each material does and how it can be used to achieve a high-quality finish. One such example is the use of screed. Screed is often applied to floors and is an integral part of the concrete flooring process. It is also known as a floor sub-base and can be laid to various specifications to accommodate different types of flooring.
The most common type of screed is a levelling screed, it is commonly found on new builds but can also be installed to existing buildings. It is designed to overcome issues such as the structural slab having a surface that is too rough or uneven to apply the final floor finish to directly. Typically it is laid to a thickness of 25mm, although the recommendation in BS 8204 Part 1 is 40mm.
Structural Screed: Ensuring Stability and Support in Construction
In addition to providing a level surface for the final floor finish, it can be incorporated into underfloor heating systems to ensure the heat is distributed evenly throughout the floor space. It is also a popular option in commercial locations as it can be laid to a thickness that can accommodate the vast majority of flooring options available.
The key to a good screed is in the preparation, to get the best results the concrete surface must be prepared correctly, this can be achieved by shooting or grinding the surface of the concrete (also known as bonding). The surface needs to be roughened to enable the screed to grab onto the base and form a strong bond. Once the surface has been prepared it is then necessary to wait for the screed to dry, this can take some time depending on the environmental conditions.