Green Roof Impact Heat Islands

Green roofs combat the urban heat island effect through three fundamental functions.

Green roof impact heat islands.

Using green roofs in cities or other built environments with limited vegetation can moderate the heat island effect particularly during the day. Green roofs and the urban heat island effect green roofs like other green spaces in cities can have a positive effect on the uhie. This evapotranspiration cools the air around the building. A green roof or rooftop garden is a vegetative layer grown on a rooftop.

Heat island effect in cities is mainly because of non natural heat absorbing materials use in buildings and other manmade structures. Plants and soils evaporate moisture. Natural greenery in the cities was replaced by concrete yards. Researchers attributed this to the increasing issue of urban heat islands which in turn increased the severity of heat waves in city areas.

Smart surfaces have also been shown to make infrastructure cooler and more resilient. The first is evapotranspiration which is the process of using heat in the air to evaporate water in plants and soil. Trees green roofs and vegetation can help reduce urban heat island effects by shading building surfaces deflecting radiation from the sun and releasing moisture into the atmosphere. Green roofs provide shade remove heat from the air and reduce temperatures of the roof surface and surrounding air.