“environmentalists define ‘green roofs’ as those that nurture growing plants. However, Rebecca Fairley Raney reports on home.howstuffworks.com that growing plants on a roof does not, by itself, make the roof cool; rather, an environmentally-friendly roof is one that has excellent cooling properties.
Technically speaking, the term “green roof” applies to a roof upon which living plants have been planted and nurtured.
Oddly enough, though, this style of green roof isn’t a cool roof. And to be really eco-friendly, you want your roof to be cool. So here’s another way to look at it. Some of the great producers of the greenhouse effect are the roofs over our heads. The sun hits the roof, and the roof reflects light back into the atmosphere. The intensity and angle of that reflected light create the so-called “heat island” effect in cities and can erode the atmosphere. Further, if the roofing material doesn’t have insulating properties, it can create a secondary environmental issue by r