Extensive Green Roof - An extensive green roof system is characterized of its vegetation, ranging from sedums to small grasses, herbs and flowering herbaceous plants, which need little maintenance and no permanent irrigation system.The growing medium depth for an extensive green roof system is typically 6 inches or less. The existing roof may not be capable of supporting an additional load. Most buildings utilize a minimum 20-year roof design life. These organizations presently are drafting a standard for investigating resistance to root penetration on green roofs. Maximize the benefits of green roof technologies, which can help . Green Roofs in Sustainable Landscape Design, Steven Cantor, 2008, W.W.Norton [ISBN: 978-0-393-73168-2] A green roof is a green space that is created by adding various layers of plants and a growing medium to the top portion of a traditional roofing system. The International Codesprovide guidelines for assign-ing these loads appropriately. Extensive Green Roofs . It is vital that the protection of the building’s fabric and in particular its waterproofing is considered in the green roof design. Specific system selection recommendations are given later below. The next step - Planning the green roof to meet the needs of the vegetation. It is built on a heritage-listed brick building in Burnley. To ensure structural safety, it’s necessary to have a structural analysis verify that the roof and its support system are capable of supporting the added load without modification. The basic anatomy of a green roof consists of vegetation, growing medium, filter membrane, drainage layer, waterproof/root repellant layer, roofing membrane support for plantings above, thermal insulation, vapor control layer, and structural roof support. Source: FLL Guidelines . Note that it is not like a traditional roof garden, in which planting is done in free-standing containers as well as planters that are placed on an easy-to-access roof … C. If the roofing project is a ‘stand-alone’ project, review the State Construction Office Manual for documentation and bidding requirements. Roofing. Some load-bearing capacities used in design of Melbourne green roofs and walls. State Construction Office “Roofing Design Guidelines and Policies.” This and other guidelines are available on the State Construction Office website. reduce a building’s heat signature and lower its visual profile Leadership in Energy and Environmental Design (LEED) As with CPTED, some of the Leadership in Energy and Environmental Design (LEED) concepts complement security concerns and others conflict Green Roofs: Ecological Design and Construction by Earth Pledge, foreword by William McDonough. different green roof systems and should be specified by the system provider. of Green Roofs The FLL „Green Roof Guidelines - Guidelines for the Planning, Construction and Maintenance of Green Roofs“ were developed from the „Principles for Green Roofing“ published in 1982 and have been revised several times since 1990. The University of Melbourne’s demonstration green roof is designed for use by visitors and staff. Schiffer Publishing, Ltd., Atglen, Pennsylvania, 2007. They are recognized as a bench-mark set of guidelines for green roofs in Germany. If the green roof is designed for use by tenants or the general public, then questions of access and of exiting are taken to another level altogether, from mere convenience to strict standards of safety and security as regulated by Building Regs. Green Roofs or Rooftop Solar Panels add additional load to a roof and its support system. Design Life. Implications of sustainable roof design; It is critical that the selected system sufficiently satisfy all of the criteria. Roof system design life should be a starting point in the selection of roof systems. All three types of roofs require specific layers of roofing materials not found on regular roofs. The dead load associated with the green roofs must be added to appropriate live loads such as snow, wind and human foot traffic to evaluate the feasibility of a green roof design. 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