Towards a more sustainable building sector
Review of the learning process on “Climate Positive Built Environment Using Bio-based and Re-used Materials”
The building sector must become more sustainable: It is responsible for up to 40 per cent of all CO2 emissions worldwide. The construction industry also consumes many resources, as valuable building materials are rarely recycled. Moreover, it’s not just about the construction phase: the way a building is constructed plays a decisive role in how much energy is used for heating or cooling throughout the entire life cycle of the building.
In order to fight climate change and protect the environment, the construction sector urgently needs to be decarbonized. There are many innovative ways to do this, for example with bio-based materials such as wood, clay and bricks or by recycling used materials.
Local authorities play a key role in making the construction sector more sustainable: as innovation drivers in their own buildings and in the design of building regulations.
As part of a yearlong learning process organized by Connective Cities, representatives from local authorities and research institutions as well as planners and architects shared their experiences and knowledge of climate-friendly constructions and inspired each other’s work.
Dialogue event: What must be done and what can we do?
The learning process began with a dialogue event in Potsdam from 13 to 15 November 2023, at which participants from Bhutan, Indonesia, Nepal, South Africa, Berlin, Heidelberg, Lörrach, Munich, Stuttgart and Potsdam reported on how they are shaping the green transformation in the building sector. In Heidelberg and Munich, the aim is to reuse as much existing building material as possible when constructing new urban neighborhoods on former military sites. Architect Nyoman Popo Priyatna Danes explained how traditional and modern technologies were combined in the construction of a hotel complex in Bali. It was important to sensitize the population to the fragility of the landscape and to ecological economic activity.
According to Dr. Susanne Winter from the World Wide Fund For Nature (WWF) Germany and Peter Heuer, Chairman of the Potsdam City Council, it is important to find a sustainable balance between the protection and use of forests when building with wood. Wood for the construction industry must come from sustainably managed forests. Prof Dr. Jürgen Kropp from Bauhaus Erde and the Potsdam Institute for Climate Impact Research (PIK) pointed out that bio-based building materials could mitigate the dangerous heating of cities and that, contrary to some opinions, wood is a stable and durable building material.
The dialogue took place in cooperation with the City of Potsdam, Bauhaus Erde and PIK.
-> Good practice I: Lörrach plans Germany’s first industrial estate in timber construction
-> Good practice II: Banepa preserves traditional building methods using bio-based materials
