Apartment block Berlin

Energy-efficient refurbishment and extension of a residential building in Berlin
Creation of 2 maisonette flats

The residential building from 1955 was modernised as part of a comprehensive energy-efficient refurbishment and an additional storey was added. The result is 2 maisonette flats over 3 floors, basement, ground floor and upper floor. The ground floor of the ‘plinth’ was refurbished and completely rebuilt. As part of the modernisation, new internal staircases were installed over three floors, while a ring beam on the top of the wall in combination with a new beam ceiling formed the basis for the extension.

The extension was realised with serially prefabricated timber sandwich panels. These highly insulated timber construction elements include integrated roller shutters and a rear-ventilated façade construction. The ground floor was given a plaster façade, while the new storey was clad with large-format fibreboard panels.

Heat is generated by a heat pump. This is powered by the large-scale photovoltaic system on the roof, while a new underfloor heating system distributes the heat throughout the house. Rainwater utilisation was also made possible via an underground infiltration system. The old building, classified as a ‘Worth Performing Building’ in the calculations, was upgraded to the EH70 EE efficiency house standard thanks to these measures – a leap from class H to A.

bfl architects were responsible for planning, construction supervision and energy and subsidy consulting.

Wohnhaus Berlin
Wohnhaus Berlin
Wohnhaus Berlin
Wohnhaus Berlin
Wohnhaus Berlin
Wohnhaus Berlin
Wohnhaus Berlin
Wohnhaus Berlin
Wohnhaus Berlin

project data

Energy-efficient refurbishment and extension

Work phases 1-8
Arnaud Bauman
Collaboration: Gresa Calliku, Morhaf Rhibani, Alexander Rothe

Construction time: 2024-2025

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