Start 2 Build Circular
Start 2 Build Circular: Building for a Sustainable Future
The energy transition from energy-intensive to energy-efficient buildings—particularly in terms of heating and cooling—is well underway. It is encouraging to see that architects, engineering firms, and contractors are successfully applying these principles in practice, making the transition tangible and its impact real.
Today, we face a new challenge: minimising the energy required to extract, produce, transport, process, manage, and potentially demolish building materials. This is where circular construction comes into play.
The term circular construction encompasses a set of design principles and building solutions that have emerged in recent years through fundamental research. However, just like with the broader sustainability transition, the true impact of circular solutions only becomes visible when they are correctly applied in practice.
The transition to a more circular construction sector requires more than policy ambitions and theoretical principles. In everyday design and construction practice, circular choices are often under pressure due to uncertainty about performance, costs, liability, and applicability. The research project circulairebouwknopen.be started from these tensions and built a bridge between circular ambitions and the reality of the construction process. The project aimed to strengthen circular building practices by sharing applicable, well‑founded, and comparable knowledge with the professional field.
More specifically, this project systematically compared circular construction methods with high disassembly potential to known, linear alternatives. This comparison focused on environmental impact (LCA), financial aspects, and process-related properties such as detachability, each assessed over the different life phases of a specific building assembly. This resulted in hands-on output in the form of 49 analyzable and mutually comparable assemblies. In this way, the construction sector is enabled to work with circular materials and detachable connections in a well‑substantiated and consistent manner. The knowledge built up was made accessible through the website circulairebouwdetails.be, whose core functionality is a database in which the analyzed assemblies can be compared and studied across their full life cycle.
At the end of the project, it can be concluded that circulairebouwknopen.be succeeded in translating complex topics such as life cycle analysis, detachability, and cost structures into an accessible and practice-oriented knowledge environment. The combination of technical substantiation, visual support, and continuous involvement of the professional field resulted in a platform that the sector perceives as relevant and usable. By explicitly focusing on comparability and transparency, the project contributes to reducing uncertainty and risk aversion around circular construction.
Circular construction details
The project demonstrates that circular construction principles are not separate from everyday design and construction practice; rather, they can be strengthened by anchoring them in concrete details and well‑substantiated choices. By placing building assemblies at the center as an analytical framework, a bridge was created between abstract sustainability objectives and the reality of the construction site. In this way, circulairebouwdetails.be provides not only knowledge but also a methodology that enables further development and scaling up.
