Screed is a mixture of cement and sand, resembling a thick paste. It has a very high viscosity and can be used to level uneven surfaces on the foundation of your home before you lay down your luxury vinyl tiles. Screeding is important because it creates a solid foundation that will support your house's weight evenly across its surface, preventing any parts from sagging. The process also removes air pockets which could cause cracks in the finished exterior layer of your flooring material.