A better roof paint to help cool houses
Times 28th Sept 2018 , In lists of history’s most significant inventions air conditioning is
regularly cited: a technology that lets us live and work in some of the most inhospitable places on the planet.
regularly cited: a technology that lets us live and work in some of the most inhospitable places on the planet.
But what if we had missed a rather simpler solution: paint. Researchers have designed a paint that reflects 96 per cent of the sun’s heat, meaning it leaves a building’s walls 6C cooler than the surrounding air. They said that the paint, which they described in the journal Science, could greatly reduce the need for air conditioning.
In hot countries cooling buildings accounts for a significant proportion of electricity consumption – 17 per cent in the US alone. This means that it is a significant contributor to global warming. Although in several Mediterranean countries there is a tradition of painting buildings white, conventional white paint reflects about 80 per cent of visible light, and is bad at reflecting that in the ultraviolet and near-infrared parts of the spectrum.
The new paint was made after physicists at Columbia University in New York noticed an unusual effect in a polymer. When this polymer turned from liquid to a thin solid film, they found that under certain conditions it went from colourless to white. It had formed a spongey consistency, from which the whiteness was derived – in the same way that colourless water turns white when it forms snow.
https://www.thetimes.co.uk/article/0c12b87c-c29b-11e8-b39e-4a881a3e11ca
https://www.thetimes.co.uk/article/0c12b87c-c29b-11e8-b39e-4a881a3e11ca
Antinuclear 
Air Conditioning is more of a curse than a boon to us. Due to the usage of air conditioners, the Earths ozone layer is being eradicated. Roof coatings paints, as mentioned earlier by you play a significant role in reducing the overall internal temperature. Scientifically it is proven that roof coating paints reduce the heat by upto 60% after application. The best part about them is they are not as expensive as air conditioners. One application lasts for a year. So in a nutshell, go green and minimize the usage of air conditioners; to protect our environment and prevent global warming.
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