Initiators and Partners

The International Green Roof City Network is a joint initiative of the International Green Roof Association (IGRA), the City of Portland (Environmental Services) and the International Federation of Landscape Architects (IFLA).

International Green Roof Association IGRA

IGRA`s targets include the worldwide promotion of the ecological Green Roof idea, an international knowledge transfer in the field of Green roofs and the stimulation of international standards for good practices and reliable Green Roof technology. One of IGRA´s main areas of work is implementing Green Roof policies on an international level. For more information please visit 

City of Portland Oregon - Environmental Services

The Bureau of Environmental Services (BES) serves the Portland community by protecting public health, water quality and the environment. BES provides sewage and stormwater collection and treatment services, protects surface and ground water quality, and works for clean rivers and healthy watersheds. BES promotes green roofs primarily to manage stormwater sustainably.  For more information please visit

International Federation of Landscape Architects IFLA

The International Federation of Landscape Architects is the body representing Landscape Architects worldwide. Its purpose is to coordinate the activities of member associations when dealing with global issues, and to ensure that the profession of landscape architecture continues to prosper as it continues to effect the design and management of our environment. For more information please visit

ZinCo GmbH

ZinCo – one of the leading manufacturers worldwide – provides tried and tested solutions worldwide for all types of green roofing. Our programme extends from extensive green roofing as an ecological protective covering or in conjunction with a photovoltaic system to roof gardens and green roofing of underground car park roofs with pathways or driveways. System-integrated, fall-prevention systems that are installed without the need for roof penetration are also an integral part of our system solutions for greened roofs. For more information please visit