Liquid screeds have so many benefits over sand and cement, but there is one slight drawback and that is that as they dry, they produce a layer of laitance on the surface. This needs to be removed before the final floor surface is installed. At UK Screeds we achieve this by sanding the floor surface approximately 7 – 10 days after the screed has been laid. This provides the perfect surface for the final flooring.Liquid screeds have so many benefits over sand and cement, but there is one slight drawback and that is that as they dry, they produce a layer of laitance on the surface. This needs to be removed before the final floor surface is installed. At UK Screeds we achieve this by sanding the floor surface approximately 7 – 10 days after the screed has been laid. This provides the perfect surface for the final flooring.