Green wall

A green wall is a wall partially or completely covered by vegetation and also includes an artificial growing medium instead of soil and an irrigation system with drainage.

Depending on the size of the wall and the solar orientation, different plants would be recommended to achieve a perennial green effect.

The benefit for the property where this wall is installed is energy efficiency fundamentally due to the evapotranspiration-transpiration of the plants.

Additionally, the value of the property will increase and it will create many indirect effects on people’s well-being, including the absorption of polluting materials and CO2.

The most apparent benefit is the improvement of well-being given the visual satisfaction and the reduction of pollutants in the air we breathe.


Integrating a green wall of live plants into your home can have many benefits

Thermal insulationc

  • Countless studies show that when a green wall is installed on a wall that receives many hours of sun, the temperature of the wall is palliated due to the creation of a layer of air, the shade the plants cast, and their evapotranspiration

Acoustic isolation

  • Like a green roof, a green wall muffles noises from the outside

Heat island effect:

  • A greener city, a city that breathes, is a city with moderate temperatures. Vegetation creates a climate of freshness around it that wouldn’t be there on a harder surface

Reduction of CO2 emission:

  • CO2 emissions would wane because:
    • Plants absorb it
    • The heat island effect would be palliated
    • Other CO2 emitting forms of insulation would be discontinued.

Urban biodiversity:

  • Increases urban biodiversity by maintaining the green corridors that range from Collserola to the Mediterranean Sea
  • Increases the m2 of green / inhabitant ratio

Pollutant particle absorption:

  • Absorption of polluting particles such as NOx and PM10

Economic aspects:

  • Appreciation of the farm

Frequently asked questions about Green wall

Will green walls cause water leaks and moisture?

The green walls have a series of vertical layers. The first layer is a waterproof sheet to prevent moisture.

How are green walls installed?

A green wall or vertical garden begins with a rigid waterproof layer, followed by a geotextile from which the pockets are formed. Inside the pockets grown plants are planted, they will be fed semi-hydroponically through irrigation pipes that supply water and minerals accumulated in a tank. A naturalized wall consists of climbing plants that grow horizontally in planters or directly on the ground and climb metal cables or attach to the wall.

What kind of green walls can be installed?

One way to naturalize a wall and get the most out of it is to make a wall with climbing plants that grow from a planter. The cost and maintenance of this solution is low but you have to wait to get results. On the other hand, if you want a vertical garden from the start, a solution that is more impactful and at a higher price is to establish a vertical growth medium with hydroponics (contribution of minerals through water). The plants will be green and large as long as the system is kept in good condition.

What is the approximate cost of a green wall?

A naturalized wall can have a cost starting from 80 € / linear meter while a vertical garden starts from 350 € / m2 including irrigation.

What is the maintenance of the green walls like?

Naturalized green walls require almost no maintenance. Vertical gardens need a specialized bi-monthly maintenance.

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