EPD vs. Self-Declaration: Why Third-Party Verification Matters

Introduction: The Credibility Gap

A manufacturer publishes a brochure stating that its insulation product has a low carbon footprint. Another manufacturer publishes an Environmental Product Declaration with verified GWP values for every life-cycle module. Both claim environmental performance. But in the eyes of a public procurer, a BREEAM assessor, or a corporate sustainability team auditing Scope 3 emissions, these two claims are not equivalent. One is a self-declaration. The other is a third-party-verified, standardised document rooted in internationally recognised methodology. The difference is not semantic. It is the difference between an assertion and evidence.

This article examines the spectrum of environmental labels and declarations available to construction-product manufacturers, explains why third-party verification has become a market requirement, and outlines the practical consequences of choosing one approach over the other.

The ISO 14020 Series: A Framework for Environmental Labels

ISO 14020: General Principles

The ISO 14020 standard establishes general principles that all environmental labels and declarations should follow. These include accuracy, verifiability, relevance, transparency, and non-deceptiveness. The standard does not prescribe a single label type but instead creates a framework under which three distinct approaches are defined, each with its own level of rigour and applicability.

Type I: Multi-Criteria Eco-Labels (ISO 14024)

Type I environmental labels are awarded by a third-party body based on criteria covering multiple environmental aspects throughout the product life cycle. The EU Ecolabel, the Nordic Swan, and the Blue Angel are examples. A Type I label tells the market that a product meets a defined set of environmental criteria, but it does not provide the underlying quantitative data. The result is a pass-fail verdict: the product either earns the label or it does not.

For construction products, Type I labels can be useful for signalling environmental commitment, but they have limitations. They do not provide the granular, indicator-level data needed for whole-building life-cycle assessment, for CPR compliance, or for Scope 3 reporting. A BREEAM assessor calculating a building’s embodied carbon cannot use an eco-label sticker as an input; they need numbers per functional unit per life-cycle module.

Type II: Self-Declared Environmental Claims (ISO 14021)

Type II environmental claims are made by manufacturers without independent third-party verification. Common examples include statements such as „made with 30% recycled content,” „low-VOC,” or „reduced carbon footprint.” ISO 14021 provides guidance on how such claims should be made, including requirements for specificity, accuracy, and substantiation. However, the standard does not require external verification. The manufacturer is responsible for ensuring the claim is truthful, and the only enforcement mechanism is market scrutiny and, potentially, advertising-standards regulation.

Self-declarations are inexpensive and fast to produce. A marketing team can draft a claim, have it reviewed by the product manager, and publish it on a datasheet within days. There is no LCA cost, no verification fee, and no programme operator to satisfy. This speed and low cost make self-declarations tempting, especially for small manufacturers with limited budgets.

Type III: Environmental Product Declarations (ISO 14025)

Type III declarations, or EPDs, are quantified environmental data documents based on life-cycle assessment, verified by an independent third party, and registered with a programme operator. They provide detailed impact indicator values per declared or functional unit across standardised life-cycle modules. The methodological basis for construction-product EPDs in Europe is EN 15804+A2, which ensures consistency across all programme operators and product categories.

The defining characteristics of an EPD are its reliance on standardised methodology, independent verification, and quantitative nature. An EPD does not judge whether a product is environmentally „good” or „bad.” It presents data. This objectivity, paradoxically, is what makes EPDs so powerful: because the data is verified and standardised, different stakeholders can trust it for different purposes.

Why Self-Declarations Fall Short in Today’s Market

The Greenwashing Problem

Greenwashing, the practice of making misleading environmental claims, has become a significant concern for regulators, investors, and consumers. The EU Green Claims Directive, which was withdrawn by the European Commission in June 2025 and whose future status remains uncertain, had explicitly targeted unsubstantiated environmental claims. Self-declarations, by their nature, are more susceptible to greenwashing because they lack the external checks that verification provides. Even well-intentioned manufacturers can produce misleading claims if they lack the methodological rigour that a standardised LCA provides. For example, a claim of „low carbon footprint” is meaningless without a defined system boundary, a reference unit, and a comparison benchmark.

Third-party verification directly addresses this risk. The verifier checks not only the arithmetic but also the methodology, the data quality, the system boundary, the allocation rules, and the completeness of reporting. A verified EPD is not immune to error, but the probability of systematic misleading is drastically reduced.

Regulatory Requirements Demand Verified Data

The regulatory landscape is evolving in a direction that strongly favours verified environmental data. The revised Construction Products Regulation (CPR 2024/3110) introduces obligations for declaring Global Warming Potential. While these obligations are not yet in force (they await the publication of new harmonised technical specifications and subsequent transition periods), the regulation clearly envisages verified, standardised environmental data as the basis for compliance. A self-declared carbon claim will not satisfy CPR requirements when they take effect.

Similarly, the Corporate Sustainability Reporting Directive (CSRD) requires companies to report Scope 3 emissions with a level of rigour that demands reliable upstream data. Product-level EPDs provide exactly the verified data that downstream companies need for their Scope 3 calculations. A self-declaration from a supplier, lacking verification and standardised methodology, introduces uncertainty that auditors will question.

Green Public Procurement Preferences

Public procurement authorities across Europe are embedding environmental criteria into construction tenders. The EU GPP criteria for office buildings, for example, reference EPDs as the preferred means of demonstrating compliance with material-related environmental thresholds. Tenders increasingly require that environmental claims be backed by EPDs or equivalent third-party-verified documents. A self-declaration, regardless of its accuracy, may not be accepted as evidence in a GPP tender evaluation, placing the manufacturer at a competitive disadvantage.

Green Building Rating Systems

BREEAM, LEED, DGNB, and similar rating systems award credits for whole-building life-cycle assessment and responsible material sourcing. These credits require product-level environmental data in the form of EPDs. A project team using self-declared data risks having those credits rejected during third-party assessment. The practical consequence is clear: products without EPDs are less likely to be specified in projects pursuing high sustainability ratings.

The Business Case for EPDs Over Self-Declarations

Market Access and Competitive Differentiation

In markets where EPDs are becoming a baseline requirement, manufacturers without them face practical exclusion from certain project types. High-profile public buildings, infrastructure projects funded by green bonds, and developments targeting top-tier sustainability ratings increasingly specify EPD-backed products. Having verified EPDs opens these market segments; relying solely on self-declarations does not.

Internal Benefits

The LCA process required for an EPD produces valuable internal insights. Manufacturers often discover previously unrecognised energy inefficiencies, supply-chain hotspots, or waste-reduction opportunities during data collection and analysis. These insights can drive operational improvements that reduce costs independently of the EPD’s external commercial value. A self-declaration, produced without a rigorous LCA, does not generate these insights.

Supply-Chain Credibility

As large construction companies and developers set decarbonisation targets, they look upstream for reliable environmental data from their material suppliers. A verified EPD demonstrates that the manufacturer takes environmental performance seriously and can provide the data that downstream partners need for their own reporting. Self-declarations, by contrast, may prompt requests for additional evidence, verification, or alternative sourcing.

Common Objections and Responses

„EPDs are too expensive for small manufacturers.”

The cost of obtaining an EPD, typically between two thousand and eight thousand euros for a single-product declaration, is modest relative to most construction-product manufacturing budgets. Programme operators such as EPD Polska offer streamlined processes and, in some sectors, the possibility of sector or group EPDs that share costs across multiple manufacturers. The cost of not having an EPD, measured in lost tenders and reduced market access, often exceeds the cost of obtaining one.

„Our customers don’t ask for EPDs.”

This may be true today for some product categories and some markets. However, regulatory trends and market dynamics suggest that demand will increase rapidly. The revised CPR, CSRD reporting obligations, GPP criteria, and broader EU regulatory trends are all pushing in the same direction. Manufacturers who wait until their customers demand EPDs will find themselves in a reactive position, scrambling to produce declarations under time pressure while competitors who acted earlier enjoy established market positions.

„A self-declaration is good enough if it’s accurate.”

Accuracy is necessary but not sufficient. The value of third-party verification lies not only in checking accuracy but in providing credible assurance of accuracy to external stakeholders. In procurement, audit, and rating contexts, this assurance has tangible value.

The Path Forward

Manufacturers do not face a binary choice between doing nothing and producing a full EPD. A pragmatic approach might start with a carbon footprint screening study to identify hotspots and build data infrastructure, then progress to a full LCA and EPD when the market or regulatory trigger arrives. However, the gap between a self-declaration and a verified EPD is not gradual; it is structural. The verification step is what transforms a claim into evidence, and in a market that increasingly demands evidence, that step is worth taking.

The process of obtaining an EPD is well-defined and accessible. Programme operators provide PCRs, templates, and guidance. Qualified LCA practitioners are available across Europe. Verification procedures are standardised. The infrastructure exists; what is needed is the decision to use it.

Frequently Asked Questions