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Case study

LCA A4+A5 Cases: What pushed these projects over the limit?

See what pushed two real construction projects over 1.5 kg CO₂/m² — and what could have kept them under.

Guide overview

Since July 2025, new construction projects in Denmark have been required to document that A4+A5 emissions stay below 1.5 kg CO₂/m²/year. Meeting the limit is not just about documentation. It is about understanding which factors actually influence the result — and where there is room to act while the project is still running.

This case study draws on real data from two projects analysed through the Acembee platform. Both projects ended above the limit. Both also show what could have made the difference.

What’s inside?

  • Data from two anonymised construction projects
  • The factors that had the greatest impact on the final result
  • Simulations of what it would have taken to get under 1.5 kg CO₂/m²
  • Five concrete actions that can reduce the risk of exceeding the limit
  • Insight into which categories carry the most weight in the A4+A5 calculation
Whether you are a contractor, developer, or advisor, this case study gives you a concrete look at what separates projects that stay under the limit from those that don’t.

Want to avoid being in the same situation? Acembee’s platform continuously collects and structures your A4+A5 data — giving you an up-to-date overview while there is still time to act and adjust.

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