A screed is a flat, thin layer of material, often made of cement or concrete, that is applied to a surface to create a smooth and level finish. It is commonly used in flooring applications to prepare a surface for tiles, carpets, or other types of flooring. Screeds can also help to improve the durability and insulation of the floor. There are different types of screeds, including traditional sand and cement screeds and more modern options like self-leveling screeds. The choice of screed depends on the specific requirements of the project, such as the desired finish and the type of flooring being installed.