Green Roofs not only retain rainwater, but also moderate the temperature of the water and act as natural filters for any of the water that happens to run off In winter, green roofs can retain between 25-40% of the precipitation that falls on them In summer, green roofs can retain 70-90% of the precipitation that falls on them With green roofs, water is stored by the substrate and then taken up by the plants from where it is returned to the atmosphere through transpiration and evaporation Prolonging the service life of heating, ventilation, and HVAC systems through decreased use Using recycled materials in the growing medium Prolonging the life of waterproofing membranes, reducing associated waste

Green roofs can contribute to landfill diversion by: Urban greening has long been promoted as an easy and effective strategy for beautifying the built environment and increasing investment opportunity GRHC members are an excellence source of green roof expertise, and a resource manual is available from GRHC's Green Infrastructure Store. Hence, all technical performance details provided will vary by region, climate, building, design, and green wall type. Please note: while there are similarities among green roofs, each installation is unique. Green roofs offer many public, private, and design-based benefits.

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