May 21, 2019


The studies and figures on the ecological and economic benefits of green roofs and “vibrant” walls are rising rapidly.

The green roof reduces the air conditioning needs of a building in the summer months, depending on its individual characteristics, from 50 to 90%. The temperature on the roof of a building with a green roof does not exceed 25-30 degrees Celsius, even in the summer, while the equivalent of a conventional building can reach 75 degrees. In London and Shanghai, only in the year 2008, 100,000m² of green roofs were planted. In France, every year 1,000,000 m² are planted annually, while in Germany 11,000,000! The numbers clearly show the enormous investments made now in green growth and the seriousness with which citizens face global warming.

The economic benefits of homeostasis

  • Reduce heat loss in the winter months
  • Reduced heating and cooling costs up to 50% • Reduce the roof surface temperature to 45-50o
  • Reduce maintenance of the building
  • Direct return on investment • Increase in the commercial value of the property
  • Double the roof insulation lifetime of 30 years with conventional insulation at 60 years

Planted Houses

As a planted house, or planted roof, green roof, roof and greenroof, all or part of the surface of a roof, a roof, a balcony, etc., is set up, where interventions are made for planting vegetation. The planted roof consists of many layers of specialized materials, which are basically the base of the installation, the drainage network, the substrate and the vegetation. Three types of planted roof are distinguished, the extensively the intensive and the semi-oriental.

  • Extensive: It is the most suitable application for Greek buildings compared to other types as it brings most benefits in proportion to the climatic conditions, installation and maintenance costs. The depth of the substrate is only 2-15 cm high, the ecological benefit is high, the vegetation that it supports is predominantly herbaceous and requires little care and maintenance.
  • Intensive: The intensive formula consists of creating a whole garden on the roof of a building. The result is very impressive, but its cost is quite high, as it requires a special static study (its weight is 150-800kg / m²), a deep substrate (0.15-1.5m) and a high cost maintenance. It also takes a lot of time to pay off the investment. Ex? however, its final form is a natural oasis in the urban landscape, as trees, trails, water elements and shading systems etc
  • Semitic: This formula combines elements of both types, this category is more appropriate, for the Greek data, the semi-oriental that tends towards the extensive press. A basic requirement for the installation of a green roof is mainly the static capacity of the building to contain the weight of the structure. Otherwise, it is a safe and very beneficial application for all types of buildings.

Selecting vegetation

The type of vegetation to be selected for each rooftop depends on the depth of the substrate that can withstand the building, the way the roof / roof is constructed, the environmental conditions, and the construction cost limit. Also, the desired functional and energy effect, as well as the aesthetic perception of the individual concerned. Indicatively, different types of flowers, herbs, herbs, Mediterranean soil cover and lawns can be planted. The ecological benefits of homeostasis

  • Increasing vegetation rate in the urban landscape and creating a natural environment for urban flora and fauna
  • Decrease of atmospheric temperature
  • Improvement of air quality through absorption of suspended particles • Enriching the atmosphere with oxygen through photosynthesis
  • Abolition of the “thermal islands” phenomenon • Protection against overflowing water in storms
  • Protection against electromagnetic radiation
  • Fire protection
  • Sound insulation
  • Reducing the amount of water flowing into the drainage system

Green “vibrant” walls

If the idea of ​​a green wall looks new to you, remember the Babylonian Hanging Gardens, which have remained in history as a technological breakthrough and aesthetic miracle. The idea of ​​hanging gardens was also applied by other peoples, such as the Vikings, while roofs with the pressed earth used in the traditional island buildings in the Mediterranean region serve the same logic. In modern times, the French botanist and researcher Patrick Blanc is considered to be the “inventor” of the green “living” wall. His collaborations with a large number of private and public institutions such as museums, schools, airports, public buildings, shopping centers, etc., as well as its extensive and highly aesthetic applications, make the green walls a great achievement in the field of building construction and ecological decoration. The green walls present the aforementioned advantages of the planted villas and additionally provide optical isolation, they can cost less and do not require much space, maintenance and grooming. By installing a green roof, the roof temperature is reduced to 45-50 degrees and the increase in the commercial value of the property.


There are two types of applications: green facades and “vibrant” walls. Green facades consist mainly of climbing plants, which grow directly on the building or on special constructions, an image that is often found in Greece. “Vibrant” walls are a structure made up of cell lines in which the plants are placed and suitable for indoor and outdoor use. The number of hives depends on their size and the surface they cover, while they change when they are worn or when they have reached their maximum life. Typically, cells with dimensions 1m long, 0.5m wide, 0.12m deep are used. and weighing 88kg / m², which are based on a special frame and in them are placed rows of different plants.

Did you know that … Just 1.5 square meters of planted roof produces enough oxygen to meet the annual needs of an adult in clean air?

The vegetation

Plant walls are so shaped as to maintain the balance between water and air in the substrate, which makes the conditions for plant growth ideal and allows them to grow both horizontally and vertically, thus covering the whole surface of the cells . Ex? the weight of the plants depends on their species and age, but when plants grow completely they should not exceed 12kg per m² for plants such as grass and 24kg per m² for the rest. The plant species that thrive on the plant walls are too many, but mainly they are ground cover because of their rapid spread over the surfaces. They are selected after a special study and range from grass, to low growth shrubs and wild flowering plants. As they change, either their foliage color or their flowers over time, they are a naturally changing canvas of natural aesthetics in the urban environment.

The benefits

In Greece, the economic crisis, besides our ecological consciousness in the installation of green terraces and walls, leads us to our pocket. All the individual benefits are financially attributable to the particular characteristics of the application and the building, e.g. the energy losses of the building, the percentage of the area planted, the local climatic conditions, etc. Apart from financial, the ecological benefits are just as remarkable.