As you can imagine, the addition of a green roof to an otherwise unused area on a building, is beneficial for the surrounding environment. Initial loss of “green” space and its inherent natural processes like photosynthesis are restored; now just a few stories higher. But green roofs also have other benefits that you might not be aware of.
During heavy rainfalls, runoff from surfaces such as pavements and rooftops can cause serious problems such as sewer over?ow and water pollution. Green roofs slow down the water ?ow by retaining up to 75% of the rainwater, thus alleviating the pressure on storm-water infrastructures.
Reducing Energy Consumption
Green roofs are great insulators. They can reduce peak energy demand by lowering a building’s cooling costs in the summer months and heating costs in the winter months.
Reducing the Urban Heat Island Effect
More green roofs and fewer dark colored roofs equal a cooler city. Dark roofs retain heat while plants naturally cool their surrounding environments through evapotranspiration cycles. In cities where the ambient temperature can be up to 10 degrees hotter than the surrounding areas, green roofs can help bring the overall temperature down.
Waterproofing Membrane Protection
A green roof protects the waterproofing membrane from damaging UV rays, freeze-thaw cycling and repeated foot traffic, extending its lifespan. Some green roofs in Europe have lasted more than 40 years without being replaced.
Improved Air Quality
Green roofs filter air by absorbing and converting carbon dioxide to oxygen.
Soil and plants are an effective sound insulator.
Green roofs are visually stimulating and can make great areas for recreation and pleasure.
Increased Property Value
Installing a green roof can increase property value by providing a valuable building asset.