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Article: Everything You Need to Know About EN 15804+A2

Estimated time to read: 2 minutes


What is the EN 15804 norm about in general?

In 2012, the European Union laid down the groundwork for environmentally conscious construction by introducing the EN 15804 norm. This norm established guidelines for the construction sector on creating Environmental Product Declarations (EPDs). In July 2019 it was revised and updated to EN 15804 + A2, replacing the old EN 15804 + A1 version. Compliance with A2 has been mandatory since 2022.

But why does EN 15804 matter? EN 15804 aims to unify the process of creating environmental impact measures in order to make them comparable. This was done by introducing rules on how data is collected, reported verified, and presented.

What’s new with EN 15804 + A2?

Now, let’s dive into the enhancements brought about by EN 15804 + A2. In the previous version, reporting obligations included seven impact categories. The updated norm, however, expands the mandatory reporting to thirteen core environmental impact categories, along with several optional ones. Furthermore, certain existing impact categories now employ revised calculation methodologies such as the Module D (treating the reuse, recycling or recovery of materials).

For instance, the indicator “Global Warming Potential” (GWP) previously used in the EN 15804 + A1 standard was divided into three categories: Climate Change Fossil, Climate Change Land Use and Land Change, and Climate Change Biogenic Removal and Emissions. Under EN 15804 + A2, Climate Change Total sums up all these three categories and is thus equivalent to the “Global Warming Potential” in the old version. This means that products need to specify both the cradle-to-gate and end-of-life phases, as well as external impacts beyond the system boundaries. The minimum requirements apply to all products in Modules A1-A3, C1-C4, and D. Below, you can find a comparison between all mandatory impact categories of both versions of EN 15804:

Comparison of mandatory impact categories of EN 15804 +A1 and +A2

Climate change – GWP100Climate change (total)
Ozone layer depletion – ODP steady stateClimate change (fossil)
Acidification potential – average EuropeClimate change (biogenic)
Eutrophication – genericClimate change (land use and land use change)
Photochemical oxidant creation potentialOzone layer depletion (ODP steady state)
Depletion of abiotic resources – elements, ultimate reservesAcidification potential (accumulated exceedance)
Depletion of abiotic resources – fossil fuelsEutrophication (aquatic freshwater)
Eutrophication (aquatic marine)
Eutrophication (terrestrial)
Photochemical ozone creation potential (tropospheric ozone formation potential)
Depletion of abiotic resources – elements, ultimate reserves
Depletion of abiotic resources – fossil fuels
Water use (Water (user) deprivation potential – weighted water consumption
Impact categories EN 15804 + A1 and + A2

Navigating through complex regulation changes

By identifying the most up-to-date data sets and applying the latest calculation methods and industry consensus, at Emidat we help the customer navigate the complexities. In the Emidat software, the calculation logic is already included – you don’t need to worry about it.

Our goal is to help customers navigate LCAs in a transparent, simple and norm-compliant manner, providing clear explanations and interpretations that are as robust as the construction projects they’re meant for.