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