The construction sector is under increasing pressure to reduce CO2 emissions, limit material consumption, and accelerate the transition towards circular and modular construction methods. While significant progress has been made in optimising logistics for new construction, far less attention has been paid to the reverse side of the value chain: what happens to materials when ‘donor’ buildings are renovated, transformed, or deconstructed - and how these materials can be reused in other ‘target’ projects.

Many building components still have substantial technical and environmental value, but are downcycled or discarded. The main barriers are not only technical, but also logistical, economic, and organisational: uncertainty about availability, quality, timing, transport, storage, costs, and liability makes reuse difficult to integrate into design and planning decisions. At the same time, digital developments such as BIM, product passports, digital twins, and data-driven logistics ...