By James Careless
Once upon a time, plants growing on a roof were seen as a sign of decay. But today, vegetation living on top of buildings is a sign of the ongoing “green roof revolution.”
In this scenario, rooftops are being covered with waterproof membranes and reinforced to support the soil and drainage necessary to raise plants on an ongoing basis. The choice of vegetation can be as simple as prairie grass or as complex as a mix of flowers, grasses and even small lightweight shrubs.