GreenGrid is the perfect solution for municipal requirements to incorporate Best Management Practice (BMP) and Low Impact Development (LID) into your development. The use of GreenGrid as a BMP allows the developer to reduce the impact the building will have on the total impervious surface of the site.  This reduction leads to smaller collection pipes, channels, and detention facilities.

A reduction in impervious surface is not the only advantage that GreenGrid offers when considering its stormwater management advantages over conventional roofing.  The modular system, with the presence of vegetation for evapo-transpiration and porous media with available storage, offers a volumetric reduction in total stormwater leaving the roof drains, resulting in lower volumes and flows entering the collection system.

GreenGrid provides for a “rougher” runoff surface than conventional roofing. This “rougher” surface increases the total time it takes for peak flows to develop from the roof, thereby attenuating the peak flow through the total development. This reduction in the peak flow allows the developer to install smaller pipes and conveyance channels.

Stormwater performance data is available for all configurations of the GreenGrid system in all depths and all regional media blends. This information provides stormwater capacity in inches of rain per square foot as well as gallons of water per square foot. Custom configurations using additional media types can also be prepared to meet specific project requirements. Please also visit the Green Roof Research page for actual in-field system performance in multiple locations.