Roofing Choices Can Help Keep Cities Cool
Three types of roofing can help to cool urban heat islands, according to a study by Environmental Protection Agency (EPA) researchers and collaborators recently published in the Proceedings of the National Academy of Sciences.
Urban heat islands are created in metropolitan areas when high ambient temperatures combine with heat coming off numerous nearby roofs, pavement, and other elements. The study focused on three types of roofing that could
The authors found that any of these roofing options can cool urban heat islands, thereby reducing the impacts of global
While all three have positive environmental implications, green roofs have less heat-mitigating power than cool roofs, but cool roofs may mean that additional heating is needed during the winter in some areas. Hybrid roofs offer some potential to address both issues in this tradeoff but are in a much earlier stage of development.
Chris Weaver, Deputy Executive Director of USGCRP (on detail from EPA) and a coauthor of the study, adds: “The built environment is going to be such a big part of societal responses to climate change, both in terms of
To read the full EPA blog post, please click here.