DUET - Circular Design and Use of Wood Building Elements

The main objective of the DUET project is to develop use scenarios for solid industrial wood residues, reclaimed wood, and underutilized forest raw materials of unknown classification in high-value wall and floor constructions. The development process considers technical feasibility to enhance the circular use of wood resources and reduce environmental impact.

To ensure the materials are suitable for construction purposes, structural testing and material property characterisation are carried out

Participants in the project are the Research Institutes of Sweden (RISE), the project coordinator is Rosenheim Technical University of Applied Sciences, Germany, Aalto University, Finland, IsoTimber Holding AB, Sweden, Masonite Beams AB, Sweden, SCA Gällö Timber, Sweden and Forestia, Norway.

Added value through collaboration and circular use of residual materials in building elements

The use of residual materials, underutilised wood species and reclaimed wood in construction elements highlights the significant added value that can be achieved through collaboration across the supply chain. By integrating industrial wood residues and recycled timber into new products, not only are new applications created for materials that would otherwise go to waste, but also synergies are formed between industries — promoting resource efficiency and driving innovation.

The circular design of these building elements contributes to:

• Extended lifespan for both materials and products. 
• Optimized material flows, increasing efficiency in wood use. 
• Longer carbon storage time, reducing climate impact over time.

These factors work together to support existing strategies and targets to achieve net-zero emissions, while strengthening the circular bioeconomy and reducing dependence on virgin raw materials.