American Hydrotech, Inc.,
303 E. Ohio Street, Chicago, IL 60611
Phone: 800-877-6125 Fax: 312-661-0731

Stormwater Management...

There are many good reasons, ecological, technical and economic, for installing a Garden Roof®. One of these reasons is stormwater management. Stormwater management can be simply defined as the control of the run-off or detention of rain water that falls on any given roof surface. Controlling this run-off can be beneficial to storm drain/sewer systems by reducing the amount and the rate of rainfall run-off that enters these systems.

The combination of the soil and Hydrotech's Garden Roof components can retain between 50% - 90% of a typical rain that falls on the roof surface. This retained water is then available for use by the vegetation instead of being added to the storm drains. In addition, the run-off that does occur is obviously slowed by having to percolate through the Garden Roof system. This slowing of the run-off also aids the storm drain network by reducing the intensity of the wave that travels through the network.

If you'd like to find out approximately how much water your Garden Roof will retain, please contact Hydrotech for a Stormwater Retention Calculation specific to your project.