Better sleep, improved health, happier people: 'cool roofs' can help millions avoid deadly heat. A project to measure how reflective paint reduces indoor temperatures is delivering tangible benefits across Africa. Houses with painted roofs are on average 3-4C cooler during the hottest hours.

Better sleep, improved health, happier people: 'cool roofs' can help millions avoid deadly heat. A project to measure how reflective paint reduces indoor temperatures is delivering tangible benefits across Africa. Houses with painted roofs are on average 3-4C cooler during the hottest hours.