White Roof Reflects Heat

The outside and roof of a building soak up the heat from the sun but if they are made of materials and finishes in lighter or white colors this can minimize this solar absorption.

White roof reflects heat.

Not only that but white paints also reflect heat at infrared wavelengths which a human eye cannot see and. There are many small scale initiatives in cities to make roof surfaces more reflective. The most well known type of reflective surface is the cool roof. Coatings are like very thick paints that can protect the roof surface from ultra violet uv light and chemical damage and some offer water protection and restorative features.

Reflective surfaces are a form of geoengineering. Cool roof coatings are white or special reflective pigments that reflect sunlight. Volunteers have taken white paint to nearly 7 million square feet of tar roofs in the city though that is still only about 1 percent of the potential roof area. Reflective surfaces can deliver high solar reflectance the ability to reflect the visible infrared and ultraviolet wavelengths of the sun reducing heat transfer to the surface and high thermal emittance the ability to radiate absorbed or non reflected solar energy.

How white roofs help to reflect the sun s heat april 14 2020 3 54pm edt nilesh bakshi maibritt pedersen zari te herenga waka victoria university of wellington.