A builder float is a versatile tool widely used in the construction industry. It consists of a flat rectangular or square blade made from materials like wood, metal, or plastic, attached to a handle. The primary purpose of a builder float is to spread and level mortar or concrete during various construction tasks, such as wall rendering or floor screeding. To use a builder float, you hold it firmly by the handle and apply pressure while moving it in sweeping motions across the surface of the material being worked on. This helps achieve an even distribution of mortar or concrete, ensuring a smooth and professional finish.