white colored roof s 20 degrees celsius cooler than dark colored roof. see experiment below using an infrared camera.
spot 1 (white color) = 42.9 deg c
spot 3 (black color) = 64.8 deg c
painting ur roof w/ a high albedo (light colored & reflective) coating can help lower the air-conditioning expenses since dark colored roof absorbs the sun’s heat. in tropical countries like the phils., dark colored roofs should be avoided since we don’t want to heat our house coz we don’t have winter snow anyway.
dark colored roofs also contribute to ‘urban heat island effect’…..
so paint ur roof white for a cooler world…..
- Painting The Roof White (andrewsullivan.thedailybeast.com)
- Roof Color and Its Effect on the Environment (brighthub.com)
- Global model confirms: Cool roofs can offset carbon dioxide emissions and mitigate global warming (eurekalert.org)
- White Roofs Can Save 15% on Energy Costs (environmentalleader.com)