The Center for Applied Energy Research (CAE) in Würzburg is working on an innovative combination of green façades and thermal insulation as part of its “Symbiose” project. The goal is to develop a functional facade system based on mineral materials, produced through additive manufacturing, and capable of capillary self-watering. At the core of the research is the use of “Mineral Direct Laser Sintering” (MDLS), a laser-based 3D printing process for porous, non-combustible materials.
The system uses perlite, an expanded silicate rock, which is processed into finely layered structures using a 2000-watt laser. MDLS technology allows for the production of lightweight construction elements with defined porosity. These graded structures enable both targeted water storage and improved thermal insulation. According to project partner ING3D GmbH, the production speed is significantly higher than that of conventional additive processes, facilitating industrial scalability.
A key research focus is to evaluate the material’s suitability for vegetative growth. Various plant species are being tested for their ability to root and thrive within the porous structures. Thanks to integrated water reservoirs, the system is designed to be largely maintenance-free. In parallel, researchers are analyzing the mechanical and thermal properties of the gradient materials under real-world conditions.
Funded by the Federal Ministry for Economic Affairs and Energy, the project aims not only to achieve ecological benefits through improved building insulation and local cooling, but also to establish a technological basis for a new generation of construction components. The results could contribute to the long-term development of modular facade systems that combine architectural, energetic, and ecological requirements into a single integrated element.
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