Keyprojects | Refurbishment Go to contents 43 Staticus was tasked with designing, producing and installing 225 prefabricated façade elements for this renovation. Unusually, the replacement of the existing curtain wall with new façade elements had to happen with the building still occupied. Furthermore, the right balance had to be achieved between preserving the existing aesthetic of the building, which is characterized by continuous window bands and repetitive modules, while at the same time improving the performance of the building envelope. As a renovation project, design solutions were required to navigate the steel reinforcements and beams that get in the building envelope’s way, and the exposed interior and exterior constructive framework. One of the most important aspects of this project was to achieve a very high level of energy efficiency. The building already had a "BREEAM In-Use: Very Good" rating, but even higher standards, including a typical heat transfer coefficient below 0.7 W/ m²K for approximately 70% of the glazing area, were required. The Staticus team opted for double-skin, cover-caped, triple glazed, unitised façade elements, and the Dronning Mauds Gate 15 is an office building located in a prime spot in Oslo’s central business district. It has been renovated to ensure it has an even higher energy efficiency performance, while at the same time retaining the building’s architectural features and overall aesthetic. total heat transfer coefficient is expected to be approximately 0.69 W/m²K for 73% of the glazing area. Staticus also chose to apply an easily recyclable, natural zinc cladding application because zinc is a non- ferrous, self-protecting metal. Life Cycle assessment (LCa) modelling gives it a Certified Environmental Profile and a Green Guide rating was produced. The short lead-in time for this project also posed challenges. In less than 2 months, the production team was able to successfully assemble the façade units. This speed was aided by the fact that units within Staticus’ typical range of sizes were selected, facilitating faster production, logistics and installation. With limited time on site, installation also needed to be carefully coordinated. Despite these challenges, Staticus delivered a building envelope with higher performance specs and an aesthetic consistent with the original building, all installed with minimal disruption to the building’s tenants. Implementation of the project was completed in 2022. Dronning Mauds Gate (DMG) 15 Oslo, Norway Photo © Andrius Gudelis