Abstract: The invention relates to a method for laying floor coverings on sub-floors using a fast-setting thin screed, in which case one mixes a primer of the expanding cement-type K with 2, 3, 4, 5-tetrahydroxyadipic acid and either admixes latexed, ground hard fibers in combination with glass and/or polymerisate fibers as well as furthermore aminoacid-polycondensation fibers and polyurethane foam, adds to the entire substance a dispersion of a butadiene/styrene-copolymerisate containing carboxyl groups, dilutes the mixture with water, applies it to the sub-floor and allows it to dry and then one applies an aqueous synthetic resin dispersion with a water content of not more than 15% and lays the floor covering thereon or the primer material mixed with the 2, 3, 4, 5-tetrahydroxyadipic acid is diluted with water, the mixture is applied to the sub-floor and a mechanical, adhesive-free bond is brought about between the floor covering and sub-floor by providing a mixture, projecting from the sub-floor, or a) latexed, grou