Saturday, 10 May 2025
This year marks five years since the European Parliament approved the Green Deal for Europe. How is the construction sector adapting to these sustainability goals?
Jakub Škaloud: The construction sector is a significant contributor to global carbon dioxide emissions, accounting for nearly 39%. Decarbonising buildings and improving their energy efficiency require continuous effort, and the pressure to reduce emissions from clients, financial institutions, and regulatory bodies is increasing. At VCES, we see this as an opportunity to innovate and proactively implement sustainability strategies.
What are the key obstacles that prevent some construction companies from adopting sustainable practices?
Jakub Škaloud: Many companies are concerned about high initial investments, the complexity of new technologies, or the lack of institutional support. However, a crucial first step is material selection, which significantly impacts the overall carbon footprint of a project.
How does material choice affect carbon emissions in construction?
Jakub Škaloud: Around 97% of CO2-equivalent emissions in the building sector come from indirect sources. Of these, approximately 55% stem from the operation of finished buildings, while the remainder is linked to construction materials. Since concrete and steel are the most widely used materials with a high carbon footprint, focusing on them can make a substantial difference.
What solutions have been effective in reducing emissions from concrete use?
Jakub Škaloud: The most commonly used cement, CEM I Portland cement, has the highest carbon footprint. By using alternative types like CEM II, CEM III, or CEM V, emissions can be reduced by up to 50%. While certain applications pose structural challenges, careful design allows for the adoption of lower-emission cement in a wide range of projects. At VCES, we have implemented these materials in multiple projects, including Nová Tesla in Pardubice and Tesla Hloubětín in Prague. Since 2021, we have reduced our use of CEM I cement by 99.3% and cut the overall carbon footprint of our concrete mixes by 22.3%.
What advancements are being made in sustainable steel production?
Jakub Škaloud: The production method has a significant impact. Traditional steelmaking involves blast furnaces, but an alternative process using electric arc furnaces can reduce emissions by over 35%. Since 2023, we have sourced 81% of our steel reinforcement from arc furnaces, reducing our steel-related carbon footprint by 28.6%.
Besides materials, what other steps can be taken to reduce the carbon footprint in construction?
Jakub Škaloud: Alternative construction methods, such as using timber structural systems, can lower carbon emissions by 20% compared to traditional reinforced concrete. Timber also improves indoor climate conditions and has health benefits. Recycling construction waste is another key strategy. At VCES, we use recycled concrete aggregate from demolition sites as a base material for new construction, reducing waste and emissions.
Modular construction is gaining traction. How does it contribute to sustainability?
Jakub Škaloud: Prefabricated solutions, such as modular bathrooms and installation shafts, enhance material efficiency and reduce waste. These techniques, common in Western Europe, are being introduced in the Czech market. We successfully implemented modular bathrooms at the Chrudimpark Residence, reducing time, labor, and emissions.
Carbon footprint calculations for buildings will become mandatory in 2028. How is VCES preparing for this?
Jakub Škaloud: We already voluntarily calculate the carbon footprint for every building we construct. The upcoming regulation will require documentation of these calculations for new buildings over 1,000 m2, expanding to all new buildings by 2030. Taking proactive steps now ensures compliance and enhances our competitiveness.
What long-term sustainability commitments has VCES made?
Jakub Škaloud: As part of Bouygues Construction, we have committed to reducing direct greenhouse gas emissions by 40% and indirect emissions by 30% by 2030. These targets align with the Paris Agreement and have been validated by the SBTi initiative. We continue adapting our processes to meet future environmental and client demands while setting an example for other companies in the industry.
