We use a 3D Laser Screed for paving large areas where the surface of the concrete must be set to an exact height. The laser screed is controlled by a computer system and guided by a laser placed at a survey point. This determines the height to set the concrete at each point. The project shown below is a parking lot/truck maneuvering area which was designed with a slope to allow for water drainage. For the best results, you have to use a laser screed.