Green Roofs for Healthy Cities (GRHC) has announced the results of its 2011 Annual Industry Survey of Corporate Members, which found that the green roof industry grew by 28.5 per cent over the course of 2010, up significantly from 16 per cent growth recorded in 2009.

In the top five Canadian metropolitan regions list, Toronto led the way, with more than 400,000 square feet installed, followed by Vancouver, at nearly 225,000 square feet.

The survey is conducted by an independent, third party consultant.