With Optigrün’s retention roof, the company impressively demonstrates how future-oriented construction and ecological responsibility can go hand in hand. The jury honored the system in the categories of innovation, high quality, ease of use, functionality and ecology – an award for holistically sustainable and practical construction concepts. The retention roof impresses with its high water storage capacity, modular design and simple integration into existing building structures. It actively supports the relief of urban drainage systems, improves the microclimate and at the same time contributes to the greening of urban spaces.