Green Façade: A sustainable approach to saving our cities

In today’s World, forests are being shortened and the built environment is being lengthened affecting the environmental balance. There is no doubt on why it is important to keep nature alive while creating safe spaces for the people.
We are limited to green space on the ground in Urban cities but are in abundance of vertical space. So, why not use that and take advantage. And that’s where the concept of green façade can bring a change. Imagine your building wrapped up in greenery, only the thought of it is so wonderful.

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Benefits of Vertical Greening-

The concept of Green facade increases the aesthetics of the cityscape while fixing the climatic crisis. The vertical greening causes evaporation and helps in maintaining the city’s climate.
The advantage of green building façade is that it takes up very little space in the densely populated and built areas providing many vertical screens of greens.

How does the Green façade affect the building’s temperature and help in energy saving?

Very little in nature remains untouched by man in today’s world. Our environment is becoming unhealthier to live in and also increasing the amount of energy required to heat and cool the buildings.
With the planning of vertical greening, the exterior walls are not in direct contact with the environment. It protects the walls from direct solar radiation, saves the façade from heating up, and thus emits less heat at night. The plants cause evaporation that enhances the surrounding’s cooling effect.

The green façade not only protects the building from the sun in the summer and keeps it cool but also protects the building from wind and heat loss.
The advantage of green building façade is not only limited to aesthetics but beneficial to the city life and also lowers the operating cost of the building in long run.

Photo by Adrian Jozefowicz from Pexels

Facade green acts as air filter-

Vertical greening serves as a dust filter and helps in improving air quality. Studies have proved that green façade absorbs pollution and reduce the air pollution index by 30%. Vertical greening can be far more effective than parks and terrace gardens in filtering the dust.

Types of green façade-

Façade green in simple words can be described as vertical integration of plants on the buildings. There are mainly two ways of incorporating the façade greening in your structures. It may be rooted in the ground or planted in a container at as many levels as required.
They are divided into two categories based on their growing methods-

  1. Plants rooted in soil-
    In this typology, the plants are rooted into the natural ground and they climb up against the wall. These plants require a lot of time to grow and don’t require watering.
  2. Plants planted in planters or containers-
    In this typology, the plants are planted in boxes and can be planned at any level of the building. This system demands watering the plants as they are not directly in contact with the natural ground.

They are divided into another two categories based on their system that works for both the growing methods-

  1. Trellis Panel system (Indirect system)-
    In this system, supporter panels are used to hold the vines of the plants. These support systems are generally made from steel and aluminum. The plants don’t directly grow on the walls. These supporters are attached to the walls and plants grow with the help of supporters. This works for both the systems, plants rooted in the soil as well as grown in the planter box.
    This system adds to the framework cost and installation time but the advantage is that it creates an air pocket between the plant and the wall.
  2. Self-growing system (Direct System)-
    In this system, no supporter is required, and the plants climb automatically and directly on the wall. There are some particular plants like Parthenocissus tricuspidate, Ficus Pumila, Parthenocissus quinquefolia, etc. that can be used for this system as they require no support to grow. They may decay inappropriate walls but is inexpensive compared to the trellis system.
Photo by Tim Mossholder from Pexels

The green spaces in urban cities are decreasing day-by-day but with green façade, we can still be surrounded by greenery from all sides and that tells a lot about the importance of green building facade.

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