About A45
We're building the tool that makes climate documentation in construction a task — not a project.
Why A45 exists
BR18 requires documentation of climate impact from transport and construction site activities — modules A4 and A5. In practice, the data lives in scattered places: invoices, supplier emails, spreadsheets, and systems that don't talk to each other. There's no single view of where a project stands — and most teams don't find out until handover, when it's too late to course-correct.
A45 is built to solve exactly that. We turn invoices and delivery data into BR18-compliant CO2 documentation — automatically and transparently.
The goal is simple: you upload your data, and we handle the rest. Accurate, traceable, and ready for reporting.
Our principles
Simplicity
The regulations are complicated enough. The tool should make it easier, not harder.
Precision
BR18 is specific. The calculations need to be correct — not close, but correct.
Transparency
Every number can be traced from invoice to final report. No black boxes.
Founder
Valdemar Løvschal Wernblad
Founder & developer
I started A45 after doing BR18 documentation myself in the construction industry. A45 is built by someone who knows the problem — and wanted to solve it properly.
Development
A45 is under active development. We're working on smarter data extraction, automatic transport data collection from suppliers, and easier cross-project collaboration. Got input? We'd like to hear from you.
Ready to try A45?
See the platform, ask questions, or get started with your first project.
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