Background: Transition to a circular economy? Flow of resources in the building industry

According to estimates, in 2010, the German residential building stock alone comprised around 10 billion tonnes of mineral construction materials, such as brick and concrete, approximately 220 million tonnes of timber and 100 million tonnes of metals. Due to on-going construction work, this stock will increase by a further 20 % by 2025 [2]. All buildings and infrastructure facilities in...