White materials are known to reflect more light as compared to dark colours. This applies to buildings and infrastructure also. The outside walls and roofs of a building or house soak the heat from the sun during the day. However, if they are made of materials that are painted in lighter or white colors, it can help reduce high solar absorption.
Using white roofs or painting the walls white can help in keeping the temperature inside the building cooler. During the warmer part of the year, this can keep the temperature inside the building cooler. The summer season in the city can be extremely hot, a few degrees hotter than in the countryside areas. Research shows that systematically replacing dark surfaces with white ones can help lower the temperatures by 2 degrees Celsius or more.
Roofs are the most exposed parts of the building or house. They have no protection … Read the rest
