A verified EPD, from one product model.
An EPD to EN 15804 is a third-party-verified LCA — not a self-declared number. Model your product’s life cycle in CarbonSig and get it verified in the platform, ready for a programme operator.
What does it take to get an EPD to EN 15804?
An EPD (Environmental Product Declaration) is a third-party-verified LCA report that follows a Product Category Rule (PCR) to EN 15804:2019+A2 — a self-declared number does not qualify. In CarbonSig you model the product’s life cycle once, produce the PCR-required data, and an independent, accredited verifier reviews it in the Verifier Hub. A programme operator then publishes the EPD. CarbonSig builds and hosts the verification; it is not a programme operator or certification body.
Every product needs its own EPD — and the usual path is slow.
The consultant-led EPD
Outsourced, product by product
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A fresh consultant engagement for each product and each update.
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The LCA leaves your hands — you can’t see or defend the numbers.
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A self-declared number that a programme won’t accept on its own.
One model in CarbonSig
Built once, verified in-platform
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Model the product once; reuse and update it yourself as data changes.
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The model, data and evidence stay in one place, node by node.
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A third-party-verified declaration, ready for a programme operator.
Build the product’s life cycle as one connected model.
Map the product node by node in the System Builder — raw materials, transport and manufacturing — and Analyze computes the cradle-to-gate result the EPD declares.
- Life-cycle modules, mapped — inputs, processes and outputs become the EN 15804 stages (A1 raw materials, A2 transport, A3 manufacturing) in one model.
- One connected result — Net Emission = Sources − Sinks − Credits gives the cradle-to-gate GWP the declaration reports.
- Reuse it for the next product — copy the model and swap the data, instead of starting a new engagement each time.
The data a declaration needs — produced from the model.
An EPD follows a Product Category Rule to EN 15804:2019+A2. CarbonSig turns your model into the PCR-required inputs a verifier and a programme operator expect.
- The right PCR — the product-category rules that set how the EPD is calculated.
- Declared / functional unit — the reference the results are expressed per (e.g. 1 kg, 1 tonne).
- Life-cycle modules — A1–A3 cradle-to-gate, and the further A–D stages where the PCR requires them.
- EN 15804 indicators — GWP-total and the core environmental indicators, per module.
- Data quality & evidence — the sources and documentation the verifier reviews.
A third party verifies it — in the same platform.
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Step 1
Register the model
Register your finished LCA to a locked, read-only copy — the immutable snapshot a verifier reviews.
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Step 2
A verifier reviews it, round by round
An independent, accredited verifier raises findings pinned to the exact node and works through revision rounds in the Verifier Hub.
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Step 3
Verified — ready for a programme operator
Once the verifier issues an opinion, the declaration is verified and ready for a programme operator to publish.
An EPD-ready declaration — and a model that keeps working.
You end with a verified, EN 15804 declaration a programme operator can publish. And because it is one connected model, the same data answers the next standard — CBAM, CSRD — without a rebuild.
EPDs, answered.
What does it take to get an EPD to EN 15804?
An EPD (Environmental Product Declaration) is a third-party-verified LCA report that follows a Product Category Rule (PCR) to EN 15804:2019+A2 — a self-declared number does not qualify. In CarbonSig you model the product’s life cycle once, produce the PCR-required data, and an independent, accredited verifier reviews it in the Verifier Hub. A programme operator then publishes the EPD. CarbonSig builds and hosts the verification; it is not a programme operator or certification body.
Does CarbonSig issue or certify the EPD?
No. CarbonSig builds the product LCA and the PCR-required data and hosts the third-party review. An independent, accredited verifier verifies the declaration and a programme operator publishes it — CarbonSig is neither the verifier nor a programme operator, and it does not certify.
Can one model produce both an EPD and a CBAM value?
Yes. You build the product’s life cycle once, and the same data set produces the EN 15804 data an EPD needs and a CBAM value — without rebuilding the model for each standard.
What is a PCR?
A Product Category Rule (PCR) defines exactly how an EPD is calculated for a product category — the declared unit, life-cycle modules and indicators. EN 15804 is the core PCR for construction products.
Which products need an EPD?
Construction products increasingly need one for public procurement and green-building schemes such as LEED, BREEAM and DGNB, as well as direct customer requirements — often product by product.
Turn your product LCA into a verified EPD.
Model it once, get it third-party verified in the platform, and hand a programme operator a declaration that holds up.