Digital transformation: how BIM is revolutionizing building renovation

Preservation of architectural heritage: a major challenge

Existing civil infrastructures and buildings have an invaluable historical and heritage value. However, their structure and safety can be compromised due to their advanced age. Over time, these buildings undergo disorders linked to their continuous use, exposure to natural elements, and the evolution of construction and safety standards. Materials may degrade, foundations weaken, and support systems become obsolete.

This progressive deterioration jeopardizes the longevity of the structures. Their consolidation and renovation then become an urgent necessity to ensure the preservation of these emblematic monuments.

Introducing carbon performance into the renovation of existing buildings

To meet the ambitious goals of carbon neutrality by 2050, it is imperative for architects and structural engineers to adopt a holistic approach to the modernization and renovation of existing buildings. Indeed, to effectively contribute to reducing greenhouse gas emissions (GHGs), the requirement for renovation efficiency must not only target energy efficiency but also take into account the carbon footprint of materials and construction processes.

At the intersection of environmental and social concerns, this approach relies on two main levers:

• Prioritizing low-carbon footprint materials during renovation work, such as recycled or renewable materials
• Aiming for building operational efficiency after the work: it is during this phase that GHG emissions are most significant

To achieve this, it is necessary to conduct a life cycle analysis of the building before renovation, in order to have a comprehensive understanding of its carbon footprint and make appropriate decisions regarding material choices and construction techniques.