You’ve likely seen plants growing on top of a commercial building or as an alternative to conventional roofing somewhere in your own community. A green roof — or vegetated roof, garden roof, living roof, or eco-roof — is a multi-layered system of plants, lightweight growing media, and other geotechnical components that are installed over a man-made, waterproof membrane.
Green roofs not only transform rooftops into beautiful green spaces, but they’re also the most popular form of Green Stormwater Infrastructure (GSI). Dollar for dollar, there’s no other form of GSI that provides the same triple bottom line — environmental, social, and economic — benefits in both the public and private sectors.
Green roofs are the first stop on the stormwater treatment train. Starting at the point where the raindrop first hits, a green roof is designed to manage stormwater by retaining a large portion of annual rainfall. It provides both volume and flow rate control during rain events, and the amount of stormwater that’s released downstream is greatly reduced and slowed down, also helping to minimize erosion issues.
Green roofs offer the opportunity for energy savings and in some cases, these savings can be significant. By increasing the evaporative cooling surface area, the urban heat island effect is minimized. The evapotranspiration that occurs on a green roof causes overall cooling, which can reduce the energy demands of certain buildings.
Green roofs come in all shapes and sizes. Depending on your project’s unique situation and needs, we’ll recommend which green roof technology is the best option.
A blue roof is designed to mimic a natural hydrologic system. It’s engineered and designed to manage stormwater, over an appropriate waterproofing, and under very specific performance standards and parameters.
Pedestal pavers are installed over a specially-designed pedestal support system. These assemblies help create a flat walking surface on a sloping rooftop. The pavers are made from high-density concrete, non-rotting wood, or porcelain tile. The pedestals can be fixed or adjusted to heights as high as 36 inches. Using pedestals raises the pavers off the existing roof surface — sloped or not — to create a flat, yet elevated walking surface. This technology is perfect for providing ADA compliant thresholds on commercial or residential rooftop patios.