Screed describes a top layer of material (traditionally sand and cement), applied on site on top of the structural concrete or insulation, on top of which other finishing materials can be applied,  eg, tiles vinyl linoleum.Liquid or flowing screed is another alternative which as the name suggests is in liquid form and uses anhydrite cement instead of ordinary portland cement.The advantages of flowing screed are the speed of which it can be applied,example sand and cement 100m to 150m a day flowing screed 500m to 1000m per day.