NaRoSan - Scalable solutions for the use of renewable raw materials in prefabricated, mass-produced building refurbishment, taking the technical life cycle into account

The replacement or partial replacement of façades, extensions and the addition of extra storeys, represent added value in serial renovation. NaRoSan demonstrates the potential for increased use of timber and other renewable raw materials and resources in the construction sector. NaRoSan focuses on the renovation of buildings constructed using timber-frame and skeleton construction methods, whose building envelopes are often energy-inefficient and require partial or complete demolition. Prefabricated timber construction offers an economical alternative to other façade systems in this context. At the building level, research is being conducted to determine which façade types are suitable for the application of serial renovation using prefabricated timber panel elements. Based on this, solutions are being developed that utilise the highest possible proportion of renewable raw materials, even in building classes 3–5. For prefabricated timber components, a system is being developed that enables the damage-free replacement of components with shorter service lives and allows for the integration of modules for heating, ventilation and cooling in the window area.  The life cycle analysis method is being adapted for serial refurbishment, drawing on the Quality Seal for Sustainable Buildings (QNG). The aim is to assess the potential for greenhouse gas savings and to demonstrate the benefits of using renewable building materials.

Kooperation mit: TH Nürnberg, Universität Kassel and various industry partners
2026 - 2028
Funding body: BMLEH via FNR