RWTH Aachen University main building
Sustainable Renovation Aligned with Heritage Preservation
  • Location
    Aachen
  • Project
    Modernization of the RWTH Aachen University main building
  • Procedure
    Closed competition
  • Awarding authority
    Bau- und Liegenschaftsbetrieb NRW Aachen
  • Competition coordinator
    assmann gruppe
  • Architect of record
    Caspar Schmitz-Morkramer
  • Planning period
    2024
  • Technical building equipment
    WSP Deutschland
  • Structural engineering
    Werner Sobek
  • Buidlind physics
    Peutz
  • Visualization
    Paul Trakies

Our approach to the energy-efficient refurbishment of the main building at RWTH Aachen University balances sustainability with monument protection. We retained the building’s historic character while upgrading its energy performance to levels typically associated with new constructions. A highlight of the renovation is the roofing over the inner courtyards, which functions as a thermal buffer, eliminating the need for external facade insulation in these areas. This solution preserves the architectural integrity of the historic structure while also creating valuable new spaces. Our streamlined technical concept minimizes maintenance and energy costs, while the use of sustainable materials, such as earthen plaster and wood fiber insulation, ensures an environmentally friendly and non-toxic outcome.

Contemporary spatial design for flexible use

The modernization also introduced a thoughtful spatial concept to meet the needs of students, faculty, and staff. Administrative offices are now consolidated on the ground floor, improving both accessibility and wayfinding for visitors. The cafeteria, though reduced in size, underwent a functional redesign and now occupies a versatile area beneath the assembly hall. This space supports multiple uses, including dining, work, and meetings, acting as a central hub for flexible, collaborative work environments. Additionally, barrier-free access through the cafeteria ensures inclusivity. The building’s new layout fosters interaction across the university community.

“Monument to the future”

The “Monument to the future” concept establishes a new benchmark for energy-efficient refurbishments of listed buildings. Modern technologies, such as a photovoltaic system integrated into the roof and an air-to-water heat pump providing the building’s entire heat supply, eliminate reliance on fossil fuels. The combination of wall surface heating and natural ventilation ensures thermal comfort while significantly reducing energy consumption. An innovative rainwater management system captures rainwater in three large basement tanks for use in the building’s sanitation facilities. These measures exemplify how historic buildings can be future-proofed, incorporating advanced technologies without harming the environment.

Project team