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14/11/2024

CCG Group Pioneers Research Into Whole-Life Carbon

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The CCG Group has taken a significant step towards sustainable construction by completing pioneering research into Whole-Life Carbon. This groundbreaking study provides crucial insights into the carbon emissions associated with the entire lifecycle of a building, from material extraction to demolition.

By partnering with Carbon Futures, a leading independent consultancy, CCG has conducted a comprehensive analysis of three key areas:

• Embodied Carbon: This stage focuses on the carbon emissions generated during the manufacturing and construction processes, including material extraction, transportation, and on-site activities.

• Operational Carbon: This aspect examines the ongoing carbon emissions from the building's operations, such as heating, cooling, and lighting.

• End-of-Life Carbon: This final stage considers the carbon emissions associated with the building's demolition, recycling, and material reuse.

The findings of this research will empower CCG to make informed decisions on material sourcing, design, and construction techniques. By adopting strategies to reduce carbon emissions across all stages of the building lifecycle, CCG aims to achieve net-zero targets and contribute to a more sustainable future.

This innovative approach to sustainable construction sets a new benchmark for the industry and highlights CCG's commitment to environmental responsibility.

The analysis was modelled on a CCG house type that adopted three different approaches to energy strategy:

1. Gas-powered heating;

2. Zero-emissions heating via an air-source heat pump;

3. Zero-emissions heating via air-source heat pump plus triple-glazing, solar panels, and electric battery storage.

For each approach, the house type retained the same foundation solution and structural composition – using CCG's off-site manufactured, closed panel 'iQ' Timber System for the superstructure and their own windows and doors – as well as the same Mechanical, Electrical, and Plumbing (MEP) services, and materials for the walls, roof, and internal finishes.

The 'Carbon Life Cycle Assessment' revealed CCG's Net Zero Home Build standard is compliant with the widely regarded 2030 LETI (Low Energy Transformation Initiative) Design Guide (2020) embodied carbon targets.

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The results also showed the addition of a battery storage unit can lower operational emissions by up to 45%, however, the embodied carbon within current battery composition means emissions are in fact higher over the home's lifetime.

A final comparison of the CCG Net Zero Home build standard was made with a theorised Passivhaus-accredited version of the same house type.

The results evidenced Whole-Life Carbon emissions for the Passivhaus standard were 25% higher when compared with CCG's own specification.

David Wylie, Managing Director of CCG, highlighted the company's proactive approach: "Since April 1 of this year, all new-build homes applying for a building warrant have been required to use non-fossil fuel ('non-polluting') heating systems. The 'New Build Heat Standard' was something we anticipated as far back as 2018.

"We recognised early on that to stay ahead of market changes, we would need to invest in and adopt new techniques and technologies, ensuring a seamless transition for both our business, our customers and the homeowner.

"This forward-looking approach will also apply to Whole-Life Carbon, and the results show just how far CCG has already come in reducing emissions. Our construction methods and the products we create naturally help to lower emissions due to the materials we use and where they are sourced from, and reduced vehicle movements at every stage of the project delivery process.

"This deeper understanding places us ahead of the industry and will only add value in the long term as building standards evolve and we continue our net zero transition. However, the potential introduction of the Scottish Passivhaus Equivalent is particularly significant.

"While CCG has assessed the Carbon Lifecycle of housing, the recently concluded Energy Standards Review consultation on a proposed Scottish Passivhaus standard does not – it only considers Operational Carbon.

"Our evidence shows that total emissions over the lifetime of a Passivhaus build are higher, which suggests that if carbon reduction truly drives legislative change, a Whole-Life Carbon approach is essential to genuinely address net zero."

The research is one most advanced studies of its kind in the UK and builds on the introduction of the CCG Net Zero Home build standard which has been used by the firm in Scotland since 2021.

The Net Zero Home is a mass-market solution designed to address the operational energy performance of housing.

It utilises a mix of an enhanced building fabric, using CCG's own manufactured timber system to minimise heat loss, and zero direct emissions heating solutions to future-proof homes and push performance towards operational net zero.

This standard is currently supporting the delivery of over 800 mixed-tenure homes across four Scottish local authorities, including a 444-home project in Edinburgh which is the largest of its kind anywhere in the country.

Development of the Net Zero Home standard and the Whole-Life Carbon Assessment was undertaken in partnership with Carbon Futures.

Andrew Money, Director of Carbon Futures, explains the research findings. He said: "Carbon Futures were delighted to be appointed by CCG to support this project. Our work has spanned many years and is the culmination of numerous key packages of research and development, including U-value and thermal bridging analysis, operational energy analysis, and Whole-Life / Embodied Carbon assessments.

"This project really demonstrates the importance of collaboration and highlights the positive impact it can have on the wider construction industry. As we strive to reduce the energy consumption in our homes and build to higher standards, we must also address the underlying emissions from material sourcing, transportation, and manufacturing processes. Only by considering and mitigating these factors can we make meaningful progress towards a net zero future and lessen our impact on the environment."

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