Kaiserslautern district administration building

Kaiserslautern District Administration Building – Kaiserslautern, Germany
Project overview

The district administration building in Kaiserslautern, constructed between 1956 and 1960, underwent a significant retrofit completed in 2020. The building houses administrative offices and public service counters. The refurbishment aimed to modernise the infrastructure, improve energy performance and enhance indoor environmental quality.
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Design challenge

Retrofitting mid‑century buildings presents challenges such as varying window sizes, outdated insulation and insufficient shading. The occupant comfort in the original building was compromised by glare and overheating due to large unprotected windows. Individual offices needed improved daylight control and energy efficiency while preserving the building’s heritage value.

RetroSolar strategy

During the retrofit, all windows were replaced with new units containing RETROLux 20 mm venetian blinds
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. Each window is fitted with its own switch, enabling occupants to control the blinds individually. The retro‑reflective slats allow daylight to enter while reflecting direct sun. The system was selected for its ability to deliver high performance without altering the building’s exterior appearance.

Building physics and performance

The integration of RetroSolar blinds reduces solar heat gain and glare, improving comfort in the offices. The new windows likely offer improved insulation, further enhancing energy efficiency. Individual control of the blinds empowers occupants to adjust shading based on personal preferences and task requirements. Overall, the retrofit significantly improves the building’s environmental performance while maintaining its character.

Architectural outcome and significance

The Kaiserslautern district administration building illustrates how retro‑reflective shading can be integrated into heritage retrofits. The project preserves the building’s architectural identity while bringing it up to contemporary standards of comfort and efficiency. It serves as a model for other municipalities seeking to modernise mid‑20th century structures in a sensitive manner.