Roof Paint Sun Absorb

The team s lab measurements show.

Roof paint sun absorb.

High solar reflectance white paint reduces direct sun energy absorption albedo hence a cool roof energy saving claim is supported. A dark roof will absorb most of this energy heating the roof and underlying building as well as the. This hidden environmental benefit is one that we must all hope we ll be able to notice. Cool roof coatings are white or special reflective pigments that reflect sunlight.

There are many types of roof systems available but the surface exposed to the sun is the one that determines if a roof is cool or not. A flat roof in the midday sun receives about 1 000 watts of sunlight per square metre. A dark roof will absorb the sun s warmth in spring and autumn when the surface isn t covered with snow. The best way to go when it comes to painting your roof neal says is to use a white urethane or silicone coating to drastically reduce the amount of heat being absorbed in fact a 2011 study published in the journal of climate reveals that painting a roof white does reduce summer air conditioning costs although on a large scale it may actually slightly increase the earth s overall temperature.

Carbon pollution reduction from cooling down roofs and walls in our city environments is a real way to reduce the urban heat island effect caused by buildings absorbing the sun s radiation then re radiating that heat after the sun goes down. 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. You can usually make a new or existing roof cool by selecting the appropriate surface. In the above chart look at how much energy makes the earths surface in the visual spectrum range.