Screeding is a method of construction a level and accurate base layer that tiles, bricks or any other, finished surface can be directly placed upon. A screed base is usually established approximately 5-10mm high, and the surface finished is then compacted down to the required level, by use of tamping tool. The state to which the screed base will compact over time and during construction will vary from mix to mix, due to the nature of different materials contained in the mix. Water content and aggregate size as well as the size of the machine used to compact the screed will effect the final result.