Volume 3 - Program & Project Ideas (PDF - 4.5 - Natural Life Network
Volume 3 - Program & Project Ideas (PDF - 4.5 - Natural Life Network
Volume 3 - Program & Project Ideas (PDF - 4.5 - Natural Life Network
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
<strong>Natural</strong> Resources Canada – Community Energy Systems<br />
• During the spring and summer, the average daily demand for space<br />
conditioning (heating, cooling) was reduced by over 75 per cent for the green<br />
roof.<br />
• The green roof reduced water runoff rate and volume. During rainfalls of<br />
10mm in 12 hours, when the roof top garden became saturated with water, it<br />
retained 45 per cent of the rainwater, and reduced the runoff rate by 75 per<br />
cent.<br />
• Roof top gardens can preserve the roof and prolong its use by reducing heat<br />
aging and thermal stress. Typically the life of a roof is 15 to 20 years, while a<br />
green roof is expected to last 25-40 years.<br />
Source: The National Research Council. 2003. Evaluating Rooftop and Vertical Gardens as an<br />
Adaptation Strategy for Urban Areas (NRCC-46737). For environmental reasons, only electronic<br />
versions are available. http://irc.nrc-cnrc.gc.ca/fulltext/nrcc46737/<br />
- Case study: Toronto, ON<br />
The Toronto Green Roof Infrastructure Demonstration <strong>Project</strong> has two demonstration<br />
sites: the publicly accessible City Hall Podium Roof and the roof of the Eastview<br />
Community Centre. There are eight garden plots on the City Hall roof; each test a<br />
different style of construction and maintenance of roof top gardens. The Eastview<br />
Neighbourhood Community Centre Green Roof Research site was launched September<br />
2002. The Institute for Research in Construction, a branch of the Ottawa-based National<br />
Research Council, is measuring the impact of the projects, particularly on the heat island<br />
effect.<br />
Source: Green Roofs for Healthy Cities. Undated. Green Roof Demonstration <strong>Project</strong>.<br />
http://www.cardinalgroup.ca/grhcc/main.htm. For a virtual tour of the project see<br />
http://peck.ca/grhcc/. This case study will be highlighted in a document to be issued by the<br />
National Research Council. For information, contact Karen Liu, Tel: (613) 993-4585, fax: (613)<br />
954-5984. E-mail: karen.liu@nrc-cnrc.gc.ca<br />
Draft 4/11/2005 88
Change language