Increased Water Retention

Green roofs retain between 50 and 90% of rainwater. Pipes, drains, water butts etc. can all be incorporated into the green roof and can help to reduce drainage costs. The risks of flooding are reduced and some of the burden is taken from the sewerage system.

Reduced Renovation Costs

When placed under a green roof, waterproofing is better protected from UV-rays, hail and the hot and cold. Oscillations in temperature are reduced and the life expectancy of the roof waterproofing is vastly increased.

Reduced Energy Costs

Thermal-insulating green roof systems, like the DUO-Dach with Floratherm® system with officially recognised thermal insulating values (k values), can be added onto the building’s insulation. The homeowner can reduce their costs by approx. 21/square metre of heating oil per year.

Green Roofs as a Substitute for Lost Areas of Landscape

Having a green roof means that the piece of land in question can be better utilised: the green roof can be taken into account as a substitute for sacrificed landscaped areas. This is often prescribed in the development plan.

Additional Space

Rooftops can be put to a number of different uses – from a pure “nature reserve” to a relaxing garden to a rooftop cafe or playground/sports pitch. And all this can be achieved without having to purchase new and expensive land.