This Demo-BLog report by project partner VITO, examines the functionalities of Digital Building Logbooks (DBLs) and user experience methodology, particularly multi-cycle circularity to enhance marketplaces for reused materials.

It presents findings on three areas of analysis: mapping current practices, co-creation processes, and defining specifications for multi-cycle circularity.

It identifies the existing gaps and future requirements for DBLs to support circularity, integrating data across three scales: materials, components, and whole buildings. Key indicators for circularity, such as reusability, recyclability, and disassembly potential, are emphasised alongside environmental impacts for a holistic sustainability approach.

This report sets a foundational framework for developing DBLs as circularity enablers in the built environment. By addressing identified gaps and aligning with policy and stakeholder needs, DBLs can significantly contribute to closing, slowing, and narrowing resource loops, ultimately driving the transition towards a circular economy.