To install screed over an area of 7000 m2, the size of a soccer field, represented a major challenge for Rainer Prinz and his team from Max Hofmann. After all, this screed should be able to withstand extreme stresses over many years. The time factor also played a key role. Because of the tight construction phase calculated for only 15 months, the screed had to settle quickly and be ready for foot traffic and installation. Other trade jobs should not be blocked longer than necessary. The date of completion, the first school day after the 2012 summer vacation, was immovable. Because of the underfloor heating, integrated in the entire building, the demand on the screed was higher than usual. Because of the temperature differences to be expected, the screed had to exhibit especially low deformation and low tension properties.