White Focus Painted Roof

Steven chu the u s.

White focus painted roof.

Oleson found that even if every city building roof and stretch of urban pavement in the world were painted white it would only delay global warming by 11 years. Secretary of energy and a nobel prize winning scientist has said that painting roofs white or another light color would help to reduce global warming by reflecting sunlight back into space it would be like removing every vehicle from the planet for 11 years. The misunderstanding is that while white roof paint can have some initial reflective value it does not eliminate heat nor does it have any waterproofing abilities. It is commonly mentioned as a way to reduce the global warming effect or conserve energy.

The urban heat island can be a killer. But its potential value in ameliorating the most severe consequences of excess heat in cities could be life saving. In 2017 more than 3 000 city rooftops were painted using both white lime and a special reflective coating. Known simply as cool roofing this process is designed to reduce the solar radiation.

Painting roofs white has been like changing lightbulbs one of the well cited easy ways out of climate change. By reflecting more light and heat back to the atmosphere a white roof should act like.