The former telecommunications tower has dominated the Bielefeld cityscape since the 1970s. Following its comprehensive modernisation, the building now has a new name and a new appearance: after the extensive revitalisation project, including a redesign of the façade, it now has a fresh new look as “H1”. Goldbeck took on the roles of client, investor, main contractor and planner all at the same time.
| Rakennustyyppi | Kaupunginosat ja monikäyttöiset rakennukset |
| Tuotealueet | Ikkunat Ovet Julkisivut Aurinkosuojaus |
| Schüco-järjestelmät | AWS 90.SI+ FWS 60.SI ADS 80 FR 30 |
| Ominaisuudet | Korjausrakentaminen DGNB |
| Sijainti | Bielefeld, Germany |
| Valmistuminen | 2024 |
| Arkkitehdit | Goldbeck |
| Erikoisyritys | Goldbeck |
| Kuvatodistus | © GOLDBECK GmbH / Christian Eblenkamp |
Before planning could begin, fundamental decisions had to be made with regard to the future use of the property. As part of the analysis of the existing building, the condition of the building was assessed and the limitations were identified. Demolition and reconstruction were out of the question for both economic and regulatory reasons, as rebuilding with a height of 74.26 metres would not have been feasible due to building regulations. In addition, the high-quality reinforced concrete structure, which could be preserved without significantly contributing to pollution levels, made a convincing argument for renovation. After examining different usage concepts, the decision was made to create a multi-tenant office building while simultaneously revitalising the property to meet new building standards.
The façade was implemented using the AWS 90.SI+ window. The new façade echoes the horizontal structure of the previous building but offers significantly larger window areas and emphasises the horizontal lines using narrow cassette cladding with rounded corners. Together with the larger window proportions, this helps to create a seamless façade appearance that allows plenty of light into the building. In the sill area, a mullion/transom construction based on the Schüco FWS 60.SI system ensures maximum transparency. The bright white cassette cladding elegantly curves around the façade and gives the main entrance on the ground floor an eye-catching and welcoming appearance.
While the high-rise building was being gutted floor by floor and the old façade was being dismantled from top to bottom using mast climbing work platforms, structural planning for the new façade was getting underway. A 3D laser scan offered a precise overview of the not insignificant differences between the measurement reference point and the unit joint of the old façade. It also provided planners with valuable data that was used to define a uniform height for the window units and to compensate for tolerances from the existing building shell through the substructure.
