GEOLOGY

Detailed explanation-1: -White roofing products stay coolest in the sun, reflecting about 60 – 90% of sunlight. However, since about half of sunlight arrives as invisible “near infrared” radiation, we can boost the solar reflectance of dark materials by using special pigments (colorants) that preferentially reflect this invisible light.

Detailed explanation-2: -White is the best color for energy efficiency because of the albedo effect. With a white roof, or a roof with a color that has similarly lighter hues, the sun’s rays are reflected instead of absorbed.

Detailed explanation-3: -Grey or grey-blue and black are good. The most ideal roof color for black solar panels is a lighter color, because they’re far enough from black to be complimentary. The bluer solar panels, while less professional-looking overall, are easier to match to your roof; blue looks okay on any background.

Detailed explanation-4: -Well, generally speaking lighter colours are better at reflecting the sun’s radiation away from the surface, with white being the colour that absorbs the least heat.

Detailed explanation-5: -Green roofs provide shade, remove heat from the air, and reduce temperatures of the roof surface and surrounding air. Using green roofs in cities or other built environments with limited vegetation can moderate the heat island effect, particularly during the day.