2026-0562 Waterproofing of the water basins at Duisburg-Duissern Botanical Garden

Summary

The tender covers partial demolition and refurbishment of two water basins at the Duisburg-Duissern Botanical Garden, waterproofing of the basins, and restoration of the surrounding paved areas. The works include demolishing 13 planting basins, removing existing waterproofing over 15 m², cleaning and pumping out 200 m² of basins, installing 280 m² of protective fleece and EPDM pond liner at least 2.00 mm thick, installing 100 m of PE fastening rail, and carrying out paving and masonry works. The works must be completed within 8 weeks after award and the final invoice submitted by the end of calendar week 47. The submission deadline is 23 September 2026 at 10:00, and the binding period ends on 6 October 2026. Price is the only award criterion. The works take place in a heritage-protected botanical garden with restricted access, requiring consideration of visitors, existing trees, underground utilities and possible archaeological finds.