Compatibility with health and the environment, material definition, recyclability, indoor air quality and diversity are a few of the parameters of increasing relevance in future planning and construction. But because building life cycles generally exceed those of ‘regular’ consumer goods many times over, the disposal and recyclability of used building materials receive much less consideration. Moreover, the service life of individual components within a building is very different. As a result, the issues surrounding building sustainability are very complex and go far beyond simply seeking to achieve energy efficiency. Eco-efficiency must therefore be an integral part of the planning strategy when designing a building. Eco-efficiency stands for goals such as greater impact, more living space, greater biodiversity, more fresh air, more beauty, intelligent rooms and greater enjoyment.