Specifiers demand better embodied carbon data from manufacturers to achieve net zero

Specifiers demand better embodied carbon data from manufacturers to achieve net zero

May 27, 2025 |NBS |2 Minute Read

27 May 2025

  • 92% of specifiers say manufacturers need to provide more sustainability performance information about their products.
  • Nearly half of specifiers (46%) and 52% of architects will only select manufacturers with better-than-average sustainability credentials.
  • Despite being the top two priorities for specifiers, environmental performance and embodied carbon data are missing from manufacturers’ top five provided data types.

 

NBS (powered by Hubexo) has published its latest Sustainability Report, exposing ongoing gaps in early stage design decisions and environmental data intended to inform sustainable outcomes. 

While awareness of sustainable construction practices continues to grow, the report underscores a pressing need for more consistent, transparent, and high-quality sustainability data from manufacturers.

The report, based on responses from hundreds of industry professionals, revealed that fewer than 50% of all projects currently achieve stringent sustainability benchmarks. The main obstacles include: inconsistent supply chain data, a lack of transparency around embodied carbon, and limited access to reliable certification schemes. Although early-stage design presents the greatest opportunity for positive environmental impact, 92% of specifiers also report that a lack of detailed, reliable sustainability performance data from manufacturers can hinder the process. 

Furthermore, the survey indicates that specifiers are inclined to choose sustainable alternatives, with nearly half (46%) and 52% of architects only specifying or selecting manufacturers with above-average sustainability credentials. This preference is especially strong when supported by Environmental Product Declarations (EPDs), essential third-party certifications that evaluate a product’s full lifecycle impact rather than isolated metrics. Unfortunately, some manufacturers are still only prioritising basic origin information, despite the accessibility of these mainstream protocols, and it’s hindering specifiers when building accurate specifications. This disconnect highlights an urgent need for alignment as the sector, which still accounts for 39% of global CO₂ emissions, accelerates its efforts to meet net-zero targets.

Lee Jones, Head of Sustainability at Hubexo, notes:

“The results of the sustainable futures report reflect something we’re seeing more and more in practice; a real appetite among specifiers for meaningful, actionable sustainability data. 

But the stats are clear, if environmental data is vague or incomplete that doesn’t support decision-making at pace. If we want sustainable choices to become the default, we have to make those choices easier to identify and compare. That means standardising how data is shared, improving transparency, and focusing on the metrics that will matter most in the coming years.”

With policy frameworks like The Future Homes Standard and The London Plan raising the bar, and environmental expectations rising, the construction industry’s next challenge is clear: match ambition with transparency, and turn sustainability promises into real-world impact.

NBS’s integrated platforms, NBS Chorus and NBS Source, are designed to support this shift. By embedding sustainability data directly into the specification workflow, alongside certifications including EPDs, carbon metrics and compliance information, NBS makes it easier for specifiers to choose low-impact products without compromising on performance or practicality.

To download the NBS Sustainable Futures Report, click here.

Our latest news

NBS and BDP join forces to improve generic carbon data in construction

Today, NBS (part of Hubexo), the platform for connected construction information, announces a long-term strategic partnership with BDP, a major global multidisciplinary practice of architects, designers, engineers and urbanists. The partnership recognises BDP's integral role in the development of NBS LCA, a new life-cycle carbon assessment platform providing professionals with high-quality, reliable and easy-to-use carbon data to ensure accurate tracking as construction projects evolve. BDP's primary contribution to NBS LCA has been the development of more than 1,300 pre-calculated generic assemblies, covering the most commonly used building fabric elements alongside key concrete and steel structural elements. These assemblies provide whole-element carbon data, giving designers consistent, UK-relevant carbon benchmarks from the earliest stages of project design. Users can easily and instantly apply carbon rates to a range of pre-configured common building elements, including walls, floors, and roofs. Developed by BDP and NBS, the assemblies remove the need for designers to manually build up material layers or calculate individual components at the concept stage. This saves significant time and effort, enabling proportionate and responsible carbon evaluation early in the design process, when decisions have the greatest impact on a project's overall carbon footprint. BDP also participated in collaborative workshops that directly informed the development of NBS LCA, helping to shape a tool that is practical, accessible and aligned with real-world UK construction workflows. Dr Lee Jones, Head of Sustainability at Hubexo, said: “BDP's contribution to NBS LCA has been invaluable. Their depth of project experience and technical knowledge has directly shaped the generic assemblies at the heart of the platform. These assemblies give designers a reliable, UK-relevant starting point for carbon assessment, without the burden of building everything from scratch. This is exactly the kind of collaboration that moves the industry forward, and we're proud to be working with BDP on a long-term basis.” Julia Yao, Associate, Sustainability Consultant at BDP, said: “Carbon assessment needs to be embedded in design from day one, not bolted on at the end. Working with NBS to develop its LCA product has been a genuine opportunity to put that principle into practice. The generic assemblies we developed draw on real project data and are designed to give designers meaningful, actionable carbon information at the concept stage. We're delighted to see them at the core of a platform that will be used across the industry.” With the UK Government outlining its commitment to responsible carbon reporting through its Carbon Budget and Growth Delivery Plan, professionals need reliable, easy-to-use tools to assess and report embodied carbon. NBS LCA addresses this need by integrating carbon calculations with live design work, drawing on structured data from Circular Ecology's ICE Database and more than 12,500 verified, specification-ready construction products with Environmental Product Declarations (EPDs) from NBS Source and ECO Portal. Over the coming months, NBS and BDP will continue to develop their partnership, with a shared commitment to improving the quality and accessibility of carbon data for construction professionals across the UK. NBS LCA is available now, with flexible subscriptions designed for all professionals. For more information, visit the website here.

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Sustainability