Mexicans create green roofs that cool more than 15º
Domotej’s green roofs are light and cheap.
May 24, 2021
3 min read
This story originally appeared on Unknown Mexico
Green roofs , also called green roofs or roof gardens environmentally friendly systems in which it is possible to plant certain types of vegetation on top of a plate (from grass to a tree).
And while their placement has many advantages, such as controlling the temperature, traditional green roofs are usually expensive and burdensome, therefore require specific conditions and are not accessible to families with limited resources.
However, this can change thanks to Mexican ingenuity. And it is that, after a long investigation that took about 12 years, a group of specialists from the Autonomous University of Chiapas (UNACH) managed to create Domotej , a green roof that can cool down to 17º.
According to a scientific article about it Domotej :
“This system involves the improvement of its thermal performance and is suitable for use in a tropical climate … In addition, it can offer some advantages over traditional systems because it requires less economic investment and because a progressive construction method can be performed by the user. are used “, Evaluation of the structural behavior of the prefabricated component for the Domotej roof.
In addition, normal roofs weigh up to 200 kilos per square meter, Domotej’s weighs 50 kilos per square meter (which is a big advantage). In addition, it is estimated that the costs of these green roofs are 13% lower than those of the usual ones.
For more information on this project you can check the profile of Alternative roofs from Chiapas.
How do they work?
Due to the strategic presence of vegetation, the green roofs of Domotej ensure that the direct thermal gain generated by solar radiation is eliminated. On the other hand, the albedo (percentage of radiation that the surfaces reflect in relation to the radiation that falls on it) is also reduced.
Likewise, the photosynthesis process in plants helps significantly to reduce the effect of “heat islands” and to purify the surrounding air. It is worth noting that it is advisable to place endemic species so as to facilitate the maintenance of the garden.
Advantages of green roofs
- They reduce environmental pollution and provide oxygen.
- They protect against solar radiation.
- They help regulate the temperature and increase the humidity in the environment.
- They act as thermal insulators, enabling them to save energy.
- They reduce maintenance costs on the roof (waterproofing is no longer necessary).
- They slow down the waterfall in the rainy season and thus help prevent flooding.