Roofs…The Undiscovered Country
April 20th, 2009
As I read more and more about clean energy production and learn more about the detrimental effects of urbanization, the more annoyed I get at all the blank roofs across the US. Just think about how much we could be doing if every roof actually had a purpose?
If there were solar panels, or solar air heaters or solar water heaters or green spaces on roofs across our country, we could be producing clean power, increasing individual independence and improving our air quality, water quality and environment. That’s why I was really intrigued when I saw this article on TreeHugger.con about Toronto’s green roof movement.
Have you heard of the Green Roof Movement?
The Green Roof Movement related to the transformation of roofs from wastelands to green spaces. The concept is to replace some of the green space taken up by urbanization and to offer several benefits to people, the environment and even to civil engineering challenges at the same time.
There are two basic types of green roofs – intensive and extensive. Intensive green roofs incorporate larger plants, shrubs and trees and are typically considered roof gardens. They require a great deal of maintenance and forethought because of the necessary depth of earth and the root structure management. They are usually on flat roofs as well. Extensive roof gardens employ grasses, drought tolerant species, herbs and other lighter weight plant materials. Extensive green roofs require less plantable earth, can be employed on a wider variety of roofs and tend to require far less maintenance.
The benefits of green roofs are more understood and supported in Europe, for example Germany has employed green roofs on about 10% of their buildings. Most people think a green roof will actually cause damage to their property but in truth there are several benefits to the building, to people and to our water infrastructure.
In fact, when employed properly, green roof technology can actually reduce heating bills and energy consumption, improve air quality by reintroducing green space and improve storm water management. Essentially, green roofs can absorb rainwater and put it to use, rather than merely creating heavy run-off that can cause flooding, erosion and inadvertently flush raw sewage into water supplies.
These are only a few of the benefits but because so little is known and there is so little known about green roof technologies, America is certainly slow to adapt.
I can’t wait to start implementing green technology on my roof – and you can bet that if I even built a new home, these technologies would be heavily considered in the construction.
To learn more about green roofs - check out the The Green Roof Research Program at MSU






