H-BAU Technik load-bearing impact sound insulation elements decouple landings and flights from staircase walls or stair flights from landings or floor slabs. They separate the staircase from the walls and so decouple adjacent living and working areas from the impact noise of footfall. The sound insulation elements reliably prevent sound bridges and, depending on the element, fulfil the requirements for increased sound insulation according to DIN 4109.