Regardless of the desired aesthetic effect, climate and microclimate have a major impact on plant selection. An extensive green roof during dormancy in East Lansing, Mich. Although this is a natural occurrence, some may find it unacceptable.įigure 2. For example, many native prairie grasses and perennials will normally dry and brown in the summer. Before selecting species on the basis of the design intent, expectations of aesthetics should be addressed because many species have dormant periods when the green roof may not appear so green. Design factors that may influence plant selection include accessibility to and use of the roof, stormwater management objectives, xeriscaping objectives and thermal insulation objectives. River Rouge assembly plant Considerations for Plant Selectionįactors in selecting plant material are design intent, aesthetic appeal, environmental conditions, media composition and depth, installation methods and maintenance. A 10.4-acre extensive green roof in Dearborn, Mich. Because of the challenges of selecting plants for shallow media, this publication focuses on extensive green roofs.įigure 1. By contrast, extensive green roofs use shallower media depths (less than 6 inches) and require minimal maintenance. Intensive green roofs are similar to landscaping found at ground level, and require media depths greater than 6 inches and have intense maintenance needs. Green roofs are categorized as intensive or extensive systems. Green roofs also help provide an aesthetically pleasing environment to work and live in. They provide numerous ecological and economic benefits, including stormwater management, energy conservation, mitigation of the urban heat island effect, increased longevity of roofing membranes, and mitigation of noise and air pollution. Green roofs, or vegetated roofs, are an alternative roofing technology in which plant material is established on the rooftop. We've got to keep it up and pass it on! Additionally, we continually strive for increased efficiency in many other areas such as providing energy-efficient skylights and offering insulation options.Selecting Plant for Extensive Green Roofs in the United States What is a Green Roof? These are just some of the ways Pro Roofing NW is leading the green movement within the roofing industry. We also have shifted our focus to emails for our pre-appointment information packets and use soft copies to distribute information. We have invested in info-structure to create an almost paperless information management system. We use soft copies of our information rather than printing out endless sheets of paper for file cabinets.
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