Cool roofs to save energy: Govt
The Delhi government will initiate a pilot project for cool-roofing under which the roof tops will be painted in light colour to save energy. Chief minister Sheila Dikshit on Wednesday said that the cool-roofing project would be carried out on some of the big buildings in the city.
The city government on Wednesday said that cool roofs conserve energy and enhance thermal comfort because the interior of building is subject to less thermal flux.
“Research has shown that cool roofs also help increase the life expectancy of roofing systems because extreme cycles of heating and cooling wear out material as they expand and contract with the temperature. Cool roofs, on the other hand, keep the roof at more constant temperature and therefore tend to last longer,” the chief minister’s office said in the statement.
Ms Dikshit said that the cool roofing project would be taken up on big buildings such as Delhi Secretariat, hospitals and schools among others.
“The RWAs will be involved to enhance the acceptability of cool roofs,” she added.
The government plans to take up a particular colony under a pilot project.
A presentation on cool roofs for cool Delhi was given in presence of the chief minister and senior officials on Wednesday.
There are three methods of cool roofing. High-albedo paint, glazed tiles and lime coating could be applied on visible patches on roof surface. Lime coating would be much cheaper but it would require repetition after every six months, whereas laying of glazed tiles would be costlier but would last long. High-albedo paint will cost reasonably and will have life of around two years.
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