Water Retention

Depending on their design, green roofs retain between 50 and 90% of rainwater. A large proportion of this water evaporates, whilst the rest gradually drains away. 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.

Improving the Microclimate

Green roofs humidify the air and provide some cool air. This is particularly effective on rooftops that lie adjacent to residential or office spaces, but also makes a valuable contribution to improving the microclimate in our urban centres. Furthermore, air conditioning systems have a much greater affect due to the reduced heating.

Binding Dust and Toxic Particles

The large foliar surface of green roofs and the deceleration of the air flow that they help to create means that landscaped roofs filter between 10 and 20% of the dust from the air. Nitrates and other substances contained in the air and rainwater are also retained and utilised.

Improved Noise Protection

Green roofs reduce sound reflexion by up to 3 dB and improve the sound proofing of a roof by up to 8 dB. These benefits are particularly useful for buildings which lie under flight paths or which contain very strong sources of noise (e.g. nightclubs, etc.).

A Larger Living Space

Landscaped roofs can go a considerable way to help compensate for green spaces, which are lost during building works. In particular, extensive species-rich landscaping can provide diverse opportunities for offering a balance.

Utilising Valuable Recycling Materials

Rubber, polyethylene and expanded polystyrene rigid foam are used in the production of drainage elements. The mono clay material Zincolit and humus are the basis for the production of ZinCo rooftop garden system soils. The most important criterion is the quality of the product, which is tested by recognised institutes and research bodies.