Green wall typology

  • 1. Soil-bound green walls: Climbing plants

  • 2. Living Wall Systems

  • 3. Modular elements


For the city and citizens

  • Decreasing the Urban Heat Island effect

    Decreasing the Urban Heat Island effect

    Green walls are recognized to have a positive effect on reducing the Urban Heat Island Effect. They have the ability to bind CO2 and to produce oxygen. The evaporation performance of the vegetation and the substrate increases the humidity and improves the urban microclimate. In summertime the heating of the building surfaces is reduced due to the shading by the plants. Green facades achieve a noticeable cooling effect and act as "near-natural air-conditioning systems".

  • Water retention

    Water retention

    As a consequence of climate change, intense rainfall events become more frequent. Green walls can reduce the surface runoff volumes. They can help to reduce flash floods and therefore relieve the sewage network. The additional capacity for water retention can help to cope with intense rainfall events in the future.

  • Air quality

    Air quality

    Green walls contribute to the absorption of fine dust and air purification in urban areas. Airborne particles and pollutants are filtered from the atmosphere by the substrates and vegetation of green walls. Depending on the plant species and size of the leaves, the plants can hold large quantities of fine particles. Green walls have the ability of self-cleaning through leaf fall in autumn and thus represent the prototype of a "clean facade".

  • Biodiversity


    Green walls can provide important refuges for wildlife in urban areas. They offer a protected habitat for various insect and bird species. In urban areas it is necessary to provide a link between the different habitats by a dense network of small living spaces (so-called "step stones"). Green roof structures can for example be connected to the habitats on the ground by means of green walls.

For building and its users

  • Thermal Performance

    Thermal Performance

    Green walls act as an additional part of the thermal insulation. They can buffer temperature-related peaks in summertime. Green walls have been shown to significantly reduce the need for air conditioning in summer and can provide a degree of insulation in winter. Depending on the type of building, the costs for cooling in summer and heating in winter can be considerably lowered.

  • Protection of Building Stock

    Protection of Building Stock

    A well-designed green wall is a natural protective shield against negative impacts and contributes to the prolongation of life of building stock. Climbing plants act like a green curtain, the leaves form a shed structure and protect the surface. The drainage effect of the roots helps to retain the foundations dry. Green walls have a temperature-balancing effect. They function as a thermal insulation. In addition, they provide protection against UV radiation, pollutants, dirt, and thereby inhibit the fatigue of materials. Green walls can be an effective, low-cost and low-maintenance facade protection against graffiti as well.

  • Sound Insulation

    Sound Insulation

    The combination of plants, substrate and trapped layers of air within green wall systems can act as a sound insulation barrier. Sound waves are absorbed, reflected or deflected. The growing medium tends to block lower sound frequencies whilst the plants block higher frequencies.

  • Upgrading of Building Stock

    Upgrading of Building Stock

    Green walls not only enhance the building, they can also submit a higher sales value of the building. Apartments with green facades are considered to be very popular and demanded on the real estate market.