It is a special product but easy to use and more climate-friendly than air-con. An Indonesian architecture lecturer tells the programme Money Mind how she hopes to expand the reach of this heat-reducing roof coating.
BANDUNG, Indonesia: In Asia, a region that could see more heatwaves like the one last month, there is a low-cost, sustainable way to make temperatures more bearable for people in cities.
This was after the project won a US$125,000 grant as one of 10 finalists in the 2019 challenge, with other finalists from countries such as Bangladesh, the Philippines and South Africa. Other cities the project has reached include Jambi, Palembang, Semarang and Pontianak. “We try to spread this product to the hot cities,” said Beta, who is based in Bandung in West Java.
In other places like schools, the temperature drop could be smaller. The difference could be due to building type, materials and design, said Beta and another member of Cool Roofs Indonesia, Ravi Srinivasan of the University of Florida. At the office of Aaksen Responsible Aarchitecture, managing partner Azzahra Dartaman said the coating reduced the indoor temperature from around 32 deg C to 25 to 27 deg C.While Aaksen did not calculate the drop in its electricity bill, she said there are also savings from running the fans less often: during “midday” hours only, instead of “almost all the time” previously.Cool Roofs Indonesia’s water-based product is simple to apply, said Beta.
Beta recalled asking Milenium Solutions if it wanted an industry partner in Indonesia to make the primer and coating but was told the firm preferred collaborating with a university for the research potential. A set of 20 kg of primer and 20 kg of coating costs 2.73 million rupiah , which can cover 120 to 160 sq m in area, depending on the absorbency of the roof material.
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