Optigrün green roofs: Innovations for sustainable building at BAU 2025
Optigrün is a leading provider of system solutions for green roofs and green buildings in Europe. The company develops innovative green roof systems that contribute to improving the urban climate and promoting biodiversity. With a comprehensive service, Optigrün supports architects, planners and building owners in the implementation of sustainable construction projects. The company places particular emphasis on intelligent rainwater management and the integration of photovoltaics into green roofs.
Optigrün solar green roof: green roofs, rainwater management and photovoltaics
The Optigrün solar green roof system combines the advantages of green roofs, solar energy and rainwater management in a future-oriented solution. On flat roof surfaces, including zero-degree roofs, the system ensures efficient storage of up to 72 liters of water per square meter. This water is distributed horizontally via capillary columns and a special absorbent fleece so that the green roof is also optimally supplied under solar modules. In addition to greening, the stored water is used for evaporation and provides a natural cooling effect that increases the efficiency of the solar modules, especially in summer temperatures.
Improved energy efficiency and protection of the roof waterproofing
An innovative advantage of the solar green roof system is the reduction of temperature peaks. Evaporation actively cools the solar module, which significantly increases its output at high outside temperatures. At the same time, the green roof significantly extends the service life of the roof waterproofing as it protects it from the effects of the weather. In contrast to conventional roofs, this eliminates the time-consuming process of removing and reinstalling solar modules for a roof renovation.
Rainwater management through retention systems
The Optigrün system integrates sophisticated rainwater management. With the help of retention throttles, which are installed in the roof drains, the stored water is discharged in a throttled manner. These throttles are easily accessible and can be maintained via inspection chambers to ensure long-term functionality. In addition, the system enables cascading drainage, which makes efficient use of the temporary storage space and is tailored to the respective roof surface using precise calculations.
Easy maintenance and sustainability
The solar green roof system relies on durable and sustainable materials. Aluminum or plastic inspection chambers ensure easy maintenance, while special covers and spacers effectively trap dirt and keep the system clean. With this combination of innovative rainwater management, improved energy efficiency and an extended service life of the roof waterproofing, Optigrün offers a solution that is not only ecologically sensible but also economically sustainable.
