In an era where resource scarcity, carbon reduction, retrofit, and reuse are central to industry discourse, should the building envelope be approached more innovatively than through the current linear cycle of design, detailing, installation, and disposal? If industries such as aerospace and automotive can lease their products with performance guarantees, is it time for construction to explore alternative models for how projects are designed and executed - placing renovation and reuse at the forefront of decision-making?

In Mckinsey 2026 Quarterly, it is estimated that the construction industry currently reuses less than 1% of building materials at the end of their typical life. Meanwhile, according to Dr. Fatih Birol Executive Director of the International Energy Agency (IEA), the built environment is simultaneously expanding by the size of Paris every week. This highlights an urgent need to address sustainable approaches not only in new construction, but also in renovation and retrofitting. With predictions suggesting that two-thirds of the buildings that will exist in 2050 have already been built, a dual approach is required. This must both significantly reduce reliance on virgin materials through the reuse and renovation of existing building stock and prioritise design for disassembly, alongside future renovation and reuse, from the outset.

Beyond these statistics, it is estimated that between 10% and 30% of the building’s total embodied carbon is attributed to the façade. This highlights the significant opportunity, and responsibility, to reduce carbon from the outside in. However, achieving meaningful reductions cannot be driven by a single strategy or discipline alone. Instead, it requires the integration of multiple approaches, forming a holistic design, detailing, and procurement strategy that supports long-term sustainability objectives. The successful integration of these strategies alongside core circular economy principles is fundamental to realise a circularity loop that preserves material value and performance, fostering reuse and extending the productive life of materials across multiple lifecycles.

Read the full publication to explore how circular design principles can help shape a more sustainable future for building façades.