Roof sealing works and other specialised construction works

Summary

The tender concerns roof sealing works for Grundschule Mengendamm in Hannover. The works include a compact roof with foam glass insulation and a retention roof with biodiversity greening and a terrace, as well as a flat roof with mineral wool, extensive green roof and PV substructure. The building is to be planned and executed in line with the German Sustainable Building Council (DGNB) certification system, with the aim of achieving DGNB Silver and QNG certification. The contractor must cooperate closely with all parties involved in the construction and must not jeopardise the certification requirements.