Before the construction phase, the responsible planners and consultants drew up a bill of quantities and arranged for a sample of scratch plaster. Since polystyrene insulation systems were ruled out at the client's request, two possible insulation variants were formulated in the tender: Variant 1 included mineral wool plus real scratch plaster with maxit ip 52, variant 2 envisaged a thick plaster insulation system with maxit ip 78 therm, mineral finishing plaster and subsequent paint coat. The insulation material, maxit MW-P 035 mineral wool in a thickness of 20 cm, was bonded with maxit multi 285 and additionally fixed with screw anchors. In the next step, the system base plaster maxit ip 78 therm was applied. While the maxit new-build ETICS was originally planned with the insulation variant 1 from the tender - until the insulation boards were bonded - the 10 - 15 mm thick base plaster had to be planned for a longer service life than initially envisaged. Only when the base plaster had cracked could the reinforcement of maxit multi 285 be started. Finally, the system was completed with the mineral plaster maxit ip 220 star with a grain size of 2 mm and the final coat of maxit solar paint.