Hall 26 | Stand B78 (Own exhibition stand)
Hall 11 | Stand F85 (Co-exhibitor)
Hall 12 | LIGNA.Stage (Programme “LIGNA.Circular”)
LIGNA 2025 | Press releases:
Hall 26, Stand B78
The Fraunhofer WKI presents innovative hybrid materials made from renewable raw materials for applications in the construction industry. The highlight this year is a curtain wall. The curtain wall is an example of the ecological, serial refurbishment of existing buildings. We are focussing on the use of renewable raw materials for the sustainable construction of the future.
The Fraunhofer WKI develops innovative solutions to increase recyclability in the wind energy sector. By focussing on the recyclability of rotor blades in construction, the researchers ensure sustainability in the material cycle. With their expertise in the field of wood bonding and hybrid components, the researchers have also made it possible to build what is currently the tallest wooden tower for commercial wind turbines. The Fraunhofer WKI will be showcasing its expertise at LIGNA 2025 with an exhibit of the wooden wind turbine tower as well as a rotor blade and recycled products made from rotor blades.
Wind energy is a central pillar of the energy transition in Germany. With around 30,000 wind turbines, this form of energy generation not only promotes technological innovation, but also creates jobs and reduces dependence on fossil fuels. Researchers at the Fraunhofer WKI are working on pioneering recycling processes that enable high-quality material utilisation of rotor blades.
At LIGNA 2025, researchers from the Fraunhofer WKI will be demonstrating that bio-based flame retardant coatings can provide durable fire protection for wooden furniture. A honeycomb-shaped shelf with the innovative flame retardant coating and other exhibits can be seen at the trade fair.
Bio-based flame retardant coatings for wood and hybrid materials support environmentally friendly and sustainable construction methods. They reduce the use of petrochemical raw materials and promote the use of renewable materials. At the Fraunhofer WKI, researchers are developing innovative coatings that are formaldehyde-free and reduce the risk of harmful emissions.
With these improved bio-based flame retardant coatings, strict environmental and fire protection regulations can also be complied with indoors. This opens up new market opportunities for manufacturers. Overall, bio-based flame retardant coatings contribute to a more sustainable and healthier building that meets the needs of today's society.
Stand of the Institute of Building Construction and Timber Structures (iBHolz) at TU Braunschweig:
Hall 11, Stand F85
The Fraunhofer WKI and TU Braunschweig are working closely together to develop innovative approaches for a resource-conserving and climate-friendly construction industry. At the stand of the Institute of Building Construction and Timber Engineering (iBHolz) at TU Braunschweig, the researchers will be presenting a building corner in timber panel construction and projects on waste wood recycling. The construction industry is resource-intensive, particularly due to the consumption of concrete and steel. In order to reduce the ecological footprint, researchers are focussing on wood and renewable raw materials. The TU Braunschweig and the Fraunhofer WKI are integrating recyclability into material development and creating processes for recycling existing products.
Together, we are developing sustainable solutions to reduce CO2 emissions and improve the recyclability of raw materials at the “Centre for Lightweight and Environmentally Friendly Buildings ZELUBA®” in Braunschweig.
Special exhibition area “LIGNA.Stage”:
Hall 12
“Thinking in circles” is the motto of the new LIGNA.Circular format. In presentations and panel discussions, the format will highlight sustainable process, material and product innovations for circular value creation. The “Wind of Change” session will take place with the participation of the Fraunhofer WKI:
The session will take place on May 28, 2025 from 1:00 p.m. to 3:00 p.m. on the LIGNA.Stage in Hall 12.
In addition to the stage programme, six themed islands around the LIGNA.Stage will explore specific approaches and best case studies, for example on processes, raw materials and materials, product design and recycling.
The Fraunhofer WKI will be presenting innovative recycling methods for wind turbine rotor blades and the resulting products and materials at one of the themed islands.
Fraunhofer Institute for Wood Research 
