The simulation analysis of climate impact also shows that light colored surface may reduce the magnitude of urban heat island effect. Recent monitoring experiments also show that increasing the reflectivity of roof materials can significantly reduce the building temperature. Because the roof receives different solar radiation concentration, and the roof usually does not have any shelter, so it is more simple and clear to improve the test of building solar reflection by means of manual intervention. Other studies have shown that increasing solar reflectivity can reduce surface thermal gain.

The laboratory has tested and selected the samples of roof anti-corrosion tile materials from the anti-corrosion tile manufacturer, and the surfaces of all the measured samples are uncoated standard samples. According to the standard test method, this test adopts the measurement method of hemispherical spectral reflectance. In the total reflectivity measurement, the data is the solar spectrum of 300-2500 nm, the incident angle is about 15 degrees, and the total spectral bandwidth spectrum data is integrated.

According to the reflection characteristics of infrared rays and ultraviolet rays, the infrared comprehensive reflection tester is used to measure the incident light and reflected light. Each sample was measured 5 times, and their average values were used for each data.

A total of 27 roof materials were tested. The test results provide six types of data:

① Hemispherical spectral reflectance.

② Integrated solar reflection.

③ UV reflectance.

④ Reflectivity of visible light.

⑤ Near infrared reflectance.

⑥ Long wave infrared reflectance.