Roof Guard Chemical Roof Cool Treatment Services For cool roofs, most of them reflects sunlight. But energy is also released into the atmosphere as infrared energy. The energy absorbed and converted into heat is transferred by convection with the air just above the surface. And the remaining heat is fed into the building. Most industry experts agree that reflectance in hot weather has a greater impact than emissivity on roof energy efficiency. The most basic explanation for the functioning of cool roofs is the high reflection coefficient in visible and near infrared (nir) and high heat emission. So that only low radiation can be transmitted to the building.
A roof that reflects or emits a large proportion of total solar radiation instead of transmitting. It keeps the building under the radiator, which leads to a reduction in cooling costs. Under optimal solar conditions for an insulated surface and minimal wind. The temperature of a black surface with a sun reflection coefficient of 0.05 is about 122 ° F higher than the temperature of the ambient air.
While a white surface with a reflection coefficient of 0.8 is only about 50 ° F higher than ambient conditions. Studies have shown that the attenuation of sunlight reflection coefficient was more pronounced on roofs with lighter colors, with the largest reduction in reflectance on white roofs. Tests and studies are key to determining the real effect of exposure to cold roofing. Although the best way to predict how a material will respond to external conditions over a given period of time is to actually place and maintain the material outside, this is not always a practical method. Fortunately. Roof Guard Chemical Provide Services: Karachi, Pakistan.