Comparison sheet of VDF Vs. Laser leveled floor using ScreedSaver boom extension machine. The following points will elaborate advantages of Laser leveled floors over VDF (Vacuum de- watered floor). • The levels achieved with Laser screedSaver technology are far more higher than any other system to create wide panel floor construction. In fact it is impossible to cast panel wider than 4-6 Mtr. using VDF system, whereas there is no restriction of panel width with laser technology. • Laser ScreedSaver technology allows concrete to be screeded without running equipment over the green / fresh concrete, thus it remains out of concrete unlike other other laser machines and VDF system. (can be seen in image below). • The withdrawal of water produces settlement of the concrete, possibly up to 3%. This can be topped up with the application of a dry shake but with little bleed water at the surface there is a risk of subsequent de-lamination which is not the case with Laser screedSaver technology. • In general practice the VDF process produces voids in the concrete and it has been found that with the same water / cement ratio, ordinary concrete has been found to have a somewhat higher strength than VDF concrete, thus it suggests the use Laser ScreedSaver as much beneficial in comparison. • VDF concrete stiffens very quickly and although this is fine in climates where VDF was first developed (Sweden) it leaves the window of workability very short in hotter climates. Workability of the concrete paste is critical when constructing a high tolerance floor for Very Narrow Aisle (VNA) warehouses or high performance flat factory floors. Laser screedSaver technology on the other hand uses low slump concrete as it uses hydraulic power to screed and can work easily in slumps as low 90MM -100MM with W/C ratio of .45% • Some of the finer materials are removed with the VDF process and fine sands and cement contents of greater than 350 Kg / m3 should be avoided. However no such conditions are faced with Laser screedSaver technology.