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. 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. 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. The tiles become white when it s hot allowing them to reflect away most of the sun s heat. A flat roof in the midday sun receives about 1 000 watts of sunlight per square metre. You can usually make a new or existing roof cool by selecting the appropriate surface.

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. Paint is an affordable flexible option for changing the look of a shingle roof that s in good condition but could use some aesthetic improvement. 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. When it s cold they turn black and absorb heat just when it s needed.