Sustainability of construction works - Environmental product declarations - Core rules for the product category of construction products

Identical to EN 15804+A1 amendment to add additional indicators. Indicators could be : - land use (biodiversity, soil quality), - particulate matter (PM 10), - human tox, - eco tox, - ionizing radiation, - water scarcity, Note oft he secretary: - If it turns out that it is not feasible to have additional indicators a justification has to be developed. - For each indicator this applicability or not should be indicating and justify - Coordination with WG1 - jwg meeting planned however perspective can be different -Pay attention to the use of indicators according to the context. - address third party assessment issue

Nachhaltigkeit von Bauwerken - Umweltproduktdeklarationen - Grundregeln für die Produktkategorie Bauprodukte

Den ersten Aufzählungspunkt durch folgenden ersetzen:
"
-   legen die zu deklarierenden Indikatoren, bereitzustellenden Informationen und die Art, wie sie auf Vollständigkeit überprüft und kommuniziert werden, fest;
".

Contribution des ouvrages de construction au développement durable - Déclarations environnementales sur les produits - Règles régissant les catégories de produits de construction

Remplacer le 1ème tiret par le suivant :
«
- définissent les indicateurs à déclarer, les informations à fournir et la manière dont ils sont regroupés
et consignés ;
»

Trajnostnost gradbenih objektov - Okoljske deklaracije za proizvode - Skupna pravila za kategorije proizvodov za gradbene proizvode

General Information

Status
Not Published
Public Enquiry End Date
24-May-2018
Current Stage
98 - Abandoned project (Adopted Project)
Start Date
18-Nov-2019
Due Date
23-Nov-2019
Completion Date
18-Nov-2019

Relations

Effective Date
01-Dec-2019
Effective Date
01-May-2018

Overview

SIST EN 15804:2012+A1:2013/oprA2:2018 is a key European standard developed by CEN (European Committee for Standardization) that defines the core rules for Environmental Product Declarations (EPDs) applicable to construction products. It establishes a harmonized methodology for quantifying and communicating the environmental performance of construction products throughout their life cycle. This amendment (prA2) extends the original EN 15804:2012+A1:2013 standard by incorporating additional environmental impact indicators such as land use, particulate matter (PM10), human toxicity, ecotoxicity, ionizing radiation, and water scarcity.

This standard supports sustainable construction practices by enabling stakeholders to assess environmental impacts transparently and consistently. It aligns with the Product Environmental Footprint Category Rules (PEFCR) to ensure compatibility with broader EU sustainability frameworks.

Key Topics

  • Environmental Product Declarations (EPDs): Specifies quantifiable environmental indicators that must be reported to describe the environmental impacts of construction products.
  • Life Cycle Assessment (LCA) Modules: Defines mandatory life cycle stages for EPD reporting, including:
    • Product stage (A1-A3)
    • End-of-life stages (C1-C4)
    • Benefits and loads beyond the system boundary (Module D) Optional stages include use stage modules (B1-B7) depending on the product type.
  • Additional Environmental Indicators: Introduces new impact categories:
    • Land use impacts affecting biodiversity and soil quality
    • Particulate matter emissions (PM10)
    • Human toxicity potential
    • Ecotoxicity potential
    • Ionizing radiation impacts
    • Water scarcity footprint
  • Declaration Rules: Clarifies requirements for product functional units or declared units, and justifications for omitted life cycle modules.
  • Data Quality and Verification: Emphasizes data transparency, quality control, and third-party verification to ensure credibility and comparability of EPDs.
  • Complementary Product Category Rules (c-PCR): Supports use of additional product-specific rules that complement EN 15804 without conflict.
  • Alignment with ISO Standards: Integrates concepts from ISO 14025 (Type III environmental declarations), ISO 14040/14044 (LCA), ISO 21930 (sustainability in building construction), and new references like ISO/DIS 14067 (carbon footprint of products).

Applications

SIST EN 15804:2012+A1:2013/oprA2:2018 is essential for a wide range of construction sector stakeholders interested in sustainability:

  • Manufacturers: To develop credible EPDs that demonstrate their products’ environmental performance and support green procurement criteria.
  • Architects and Designers: To select materials and products based on quantified environmental impact data, aiding sustainable building design and compliance with green building certifications.
  • Construction Companies: To evaluate environmental impacts of building assemblies and optimize material choices for reduced overall footprint.
  • Building Owners and Developers: To inform lifecycle decision-making and promote transparency in sustainability reporting.
  • Policy Makers and Regulators: To establish environmentally-based regulations, standards, and procurement policies promoting sustainable construction.
  • LCA Practitioners: To follow a harmonized methodology for assessing construction products and generating comparable environmental data.

The expanded indicators in amendment prA2 enhance the scope of sustainability considerations, addressing emerging environmental concerns such as biodiversity loss, air quality, and water scarcity, which are critical for holistic life cycle assessments.

Related Standards

  • EN 15804:2012+A1:2013: Original core rules for EPDs of construction products.
  • ISO 14025: Environmental labels and declarations - Type III environmental declarations principles.
  • ISO 14040/ISO 14044: Life cycle assessment principles and requirements.
  • ISO 21930: Sustainability in building construction - Environmental declaration of building products.
  • ISO/DIS 14067: Carbon footprint of products - Requirements and guidelines for quantification.
  • Product Environmental Footprint (PEF) Methodology: Harmonized EU approach that complements EN 15804 for construction sector assessments.
  • Complementary Product Category Rules (c-PCRs): Set of detailed PCRs tailored for specific product groups following EN 15804.

Keywords

Environmental Product Declarations, EPD, Construction Product Sustainability, Life Cycle Assessment, EN 15804 Amendment, Environmental Impact Indicators, Construction Materials, Sustainable Building, Product Environmental Footprint, LCA Modules, Third-Party Verification, Eco-Design, Biodiversity Impact, Water Scarcity, ISO 14025, Green Building Certification, Sustainable Construction Standards, CEN Technical Committee 350.


This standard forms a foundation for transparent, comparable environmental reporting in the construction industry, promoting circular economy principles and efficient resource use, thereby advancing the sustainability agenda across Europe and beyond.

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SIST EN 15804:2012+A1:2013/oprA2:2018

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Frequently Asked Questions

SIST EN 15804:2012+A1:2013/oprA2:2018 is a draft published by the Slovenian Institute for Standardization (SIST). Its full title is "Sustainability of construction works - Environmental product declarations - Core rules for the product category of construction products". This standard covers: Identical to EN 15804+A1 amendment to add additional indicators. Indicators could be : - land use (biodiversity, soil quality), - particulate matter (PM 10), - human tox, - eco tox, - ionizing radiation, - water scarcity, Note oft he secretary: - If it turns out that it is not feasible to have additional indicators a justification has to be developed. - For each indicator this applicability or not should be indicating and justify - Coordination with WG1 - jwg meeting planned however perspective can be different -Pay attention to the use of indicators according to the context. - address third party assessment issue

Identical to EN 15804+A1 amendment to add additional indicators. Indicators could be : - land use (biodiversity, soil quality), - particulate matter (PM 10), - human tox, - eco tox, - ionizing radiation, - water scarcity, Note oft he secretary: - If it turns out that it is not feasible to have additional indicators a justification has to be developed. - For each indicator this applicability or not should be indicating and justify - Coordination with WG1 - jwg meeting planned however perspective can be different -Pay attention to the use of indicators according to the context. - address third party assessment issue

SIST EN 15804:2012+A1:2013/oprA2:2018 is classified under the following ICS (International Classification for Standards) categories: 13.020.20 - Environmental economics. Sustainability; 91.010.01 - Construction industry in general. The ICS classification helps identify the subject area and facilitates finding related standards.

SIST EN 15804:2012+A1:2013/oprA2:2018 has the following relationships with other standards: It is inter standard links to SIST EN 15804:2012+A2:2019, SIST EN 15804:2012+A1:2013. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

SIST EN 15804:2012+A1:2013/oprA2:2018 is associated with the following European legislation: EU Directives/Regulations: 305/2011; Standardization Mandates: M/350, M/350 AMDT. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.

You can purchase SIST EN 15804:2012+A1:2013/oprA2:2018 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of SIST standards.

Standards Content (Sample)


SLOVENSKI STANDARD
01-maj-2018
Trajnostnost gradbenih objektov - Okoljske deklaracije za proizvode - Skupna
pravila za kategorije proizvodov za gradbene proizvode
Sustainability of construction works - Environmental product declarations - Core rules for
the product category of construction products
Nachhaltigkeit von Bauwerken - Umweltproduktdeklarationen - Grundregeln für die
Produktkategorie Bauprodukte
Contribution des ouvrages de construction au développement durable - Déclarations
environnementales sur les produits - Règles régissant les catégories de produits de
construction
Ta slovenski standard je istoveten z: EN 15804:2012+A1:2013/prA2
ICS:
13.020.20 Okoljska ekonomija. Environmental economics.
Trajnostnost Sustainability
91.010.01 Gradbeništvo na splošno Construction industry in
general
SIST EN en,fr,de
15804:2012+A1:2013/oprA2:2018
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
EN 15804:2012+A1:2013
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA2
March 2018
ICS 91.010.99
English Version
Sustainability of construction works - Environmental
product declarations - Core rules for the product category
of construction products
Contribution des ouvrages de construction au Nachhaltigkeit von Bauwerken -
développement durable - Déclarations Umweltproduktdeklarationen - Grundregeln für die
environnementales sur les produits - Règles régissant Produktkategorie Bauprodukte
les catégories de produits de construction
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 350.

This draft amendment A2, if approved, will modify the European Standard EN 15804:2012+A1:2013. If this draft becomes an
amendment, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for
inclusion of this amendment into the relevant national standard without any alteration.

This draft amendment was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 15804:2012+A1:2013/prA2:2018 E
worldwide for CEN national Members.

EN 15804:2012+A1:2013/prA2:2018 (E)
Contents Page
European foreword . 4
1 Modification throughout the entire document. 5
2 Modification to the Introduction . 5
3 Modification to Clause 1 “Scope” . 5
4 Modification to Clause 2 “Normative references” . 5
5 Modification to Clause 3 “Terms and definitions” . 5
6 Modification to Clause 4 “Abbreviations” . 6
7 Modification to 5.2 “Types of EPD with respect to life cycle stages covered” . 6
8 Modification to 5.3 “Comparability of EPD for construction products” . 10
9 Modification to 5.4 “Additional environmental information” . 10
10 Modification to 6.2.1 “General” . 11
11 Addition of 6.3.1 “Functional or declared unit” . 11
12 Modification to 6.3.2 “Functional unit” . 12
13 Modification to 6.3.4 “Reference service life (RSL)” . 13
14 Modification to 6.3.3 “Declared unit” . 14
15 Modification to 6.3.5.1 “Gerneral” . 14
16 Modification to 6.3.5.2 “Product stage” . 15
17 Modification to 6.3.5.4.3 “B6 – B7 use stage information modules related to the
operation of the building” . 15
18 Modification to 6.3.5.5 “End-of-life-stage” . 15
19 Modification to 6.3.5.6 “Benefits and loads beyond the product system boundary in
module D” . 15
20 Modification to 6.3.8 “Data quality”. 15
21 Modification to 6.3.9 “Developing product level scenarios”. 17
22 Modification to 6.4.3.1 “General” . 17
23 Modification to 6.4.3.3 “Allocation procedure of reuse, recycling and recovery” . 17
24 Addition of 6.4.4 “Environmental information on biogenic carbon inventory data” . 17
25 Modification to 6.5 “Environmental information on biogenic carbon inventory data” . 18
26 Modification to 7.1 “Declaration of general information” . 19
27 Modification to 7.2 “Declaration of environmental indicators derived from LCA” . 19
28 Modification to 7.2.2 “Rules for declaring LCA information per module” . 19
29 Modification to 7.2.3 “Indicators describing environmental impacts based on Life
Cycle Impact Assessment (LCIA)” . 20
30 Modification to 7.2.4 “Indicators describing resource use and environmental
information based on Life Cycle Inventory (LCI)” . 22
31 Addition of 7.2.4.2 “Indicators describing resource use” . 22
EN 15804:2012+A1:2013/prA2:2018 (E)
32 Addition of 7.2.4.3 “Environmental information describing biogenic carbon
removals and emissions” . 23
33 Addition of 7.2.4.4 “Environmental information describing waste categories” . 23
34 Addition of 7.2.4.5 “Environmental information describing different output flows” . 23
35 Addition of 7.2.5 “Information on biogenic carbon content” . 24
36 Modification to 7.3.1 “General” . 24
37 Modification to 7.3.2.1 “A4, Transport to the building site” . 25
38 Modification to 7.3.2.2 “A5, Installation in the building” . 25
39 Modification to 7.3.3.1 “B1-B5 use stage related to the building fabric” . 25
40 Modification to 7.3.3.2 “Reference service life” . 25
41 Modification to 7.3.3.3 “B6, use of energy and B7, use of water” . 25
42 Modification to 8.1 “General” . 25
43 Modification to 8.2 “LCA-related elements of the project report” . 25
44 Modification to 8.4 “Data availability for verification” . 26
45 Modification to Clause 9 “Verification and validity of an EPD” . 26
46 Modification to Annex A “Requirements and guidance on the reference service life” . 26
47 Modification to Annex C “Impact categories and related indicators, methodologies
and characterisation factors (CF)” . 26
C.2.3 Sub-category GWP - land use and land use change (GWP ) . 29
Luluc
48 Additional Annex D “End of life formulae” . 30
49 Additional Annex E “Method to rank data sources for secondary data based on the
PEF approach” . 35
50 Modification to the Bibliography . 38

EN 15804:2012+A1:2013/prA2:2018 (E)
European foreword
This document (EN 15804:2012+A1:2013/prA2:2018) has been prepared by Technical Committee
CEN/TC 350 “Sustainability of construction works”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
EN 15804:2012+A1:2013/prA2:2018 (E)
1 Modification throughout the entire document
Adjust the numbering of the clauses and tables as well as the corresponding references throughout the
entire document according to the changes in the document as listed below.
2 Modification to the Introduction
Replace “information for buildings” with “information for buildings and other construction works” in the
th
5 paragraph.
th
Replace the 6 paragraph with the following one:
“The standard deals with a set of quantifiable, predetermined environmental impact indicators, which
are aligned with the Product Environmental Footprint Category Rules (PEFCR) for the construction
sector and based on the amendment of the standardisation Mandate M/350.”.
th
Delete “This suite of standards includes”: in the 8 paragraph.
3 Modification to Clause 1 “Scope”
st
Replace the 1 bullet with the following one:

— defines the indicators to be declared, information to be provided and the way in which they are
collated and reported,
”.
4 Modification to Clause 2 “Normative references”
Add the following reference to the list:
“ISO/DIS 14067, Greenhouse gases — Carbon footprint of products — Requirements and guidelines for
quantification”.
Replace the reference to ISO 21930 as follows:
“ISO 21930:2017, Sustainability in building construction — Environmental declaration of building
products”.
5 Modification to Clause 3 “Terms and definitions”
Replace the definition of “average data” with the following one:

3.3
average data
data representative of a product, product group or construction service, provided by one or more
supplier
Note 1 to entry: The product group or construction service can contain similar products or construction
services.
“.
EN 15804:2012+A1:2013/prA2:2018 (E)
Add the following new definition and adjust the numbering throughout the clause accordingly:

3.21
complementary product category rules
c-PCR
product group specific or horizontal PCR, which provide additional compliant and non-contradictory
requirements to EN 15804
Note 1 to entry: c-PCR are meant to be used together with EN 15804.
[Source: EN ISO 14040:2006]
“.
Add the following two notes to entry to the definition of “renewable resource”:

Note 2 to entry: Activities that occur in the technosphere such as recycling are not considered natural
replenishment or cleansing.
Note 3 to entry: In this context, human time scale refers to the typical life time of a human rather than the time
humans have been in existence.
”.
Replace the definition of “type III environmental declaration” with the following one:

3.33
type III environmental declaration
environmental declaration providing quantified environmental data using predetermined indicators
and, where relevant, additional environmental information
Note 1 to entry: The calculation of predetermined indicators is based on the ISO 14040 series of standards,
which is made up of ISO 14040, and ISO 14044.
Note 2 to entry: Adapted from ISO 14025:2006.
“.
6 Modification to Clause 4 “Abbreviations”
Add the following new abbreviations:
“c-PCR Complementary product category rules”,
“PEF Product Environmental Footprint”.
Delete “EPBD Energy performance of buildings directive”.
7 Modification to 5.2 “Types of EPD with respect to life cycle stages covered”
Replace the whole content of 5.2 “Types of EPD with respect to life cycle stages covered”with the following:
“All construction products and materials shall declare modules A1-A3, modules C1-C4 and module D
with the following exception.
Products and materials that:
EN 15804:2012+A1:2013/prA2:2018 (E)
— are physically integrated with other products during installation so they cannot be physically
separated from them at end of life, and
— are no longer identifiable at end of life as a result of a physical or chemical transformation process.
If modules C1 to C4 and module D are not declared this decision shall be justified.
Construction products and materials that are identified as exceptions may omit the declaration of
modules C1-C4 and module D. Any omission of modules C1–C4 and module D shall be justified.
Types of EPD that may be provided are (see Figure 1):
— Cradle to gate with modules C1–C4 and module D: (A1-A3, C and D). These stages are the minimum
to be declared by for products as defined above and shall be based on a functional unit or declared
unit.
— Cradle to gate with options, modules C1–C4, and module D: (A1-A3, C, D and additional modules.
The additional modules may be A4 and/or A5 and/or B1-B7). This type of EPD is only possible for
products as defined above and shall be based on a functional unit or declared unit.
— Cradle to Grave with module D: (A, B, C and D). This declaration is only possible for products as
defined above and shall be based on a functional unit or declared unit.
— Cradle to gate: (A1-A3): These stages are the minimum to be declared for all construction products
that are exceptions as defined above and shall be based on a declared unit. Such an EPD covers raw
material supply, transport, manufacturing and associated processes, i.e. the product stage.
— Cradle to gate with options (A1-A3 and additional modules. The additional modules may be A4 and
A5): This type of EPD is only possible for construction products that are exceptions as defined
above and shall be based on a declared unit. These types of product cannot declare modules B1–B7.
NOTE 1 Information modules can supply information for processes for which there is no EPD available, e.g. a
cleaning process.
NOTE 2 An information module may contain: the values of the pre-determined indicators and the technical
information underlying their quantification, relevant technical information for further calculation of the
environmental performance, scenarios for further calculation of the environmental performance.
NOTE 3 It is possible to have an EPD for a substance or preparation (e.g. cement), for a product (e.g. window), for
a construction service (e.g. cleaning service as part of maintenance) and for an assemblage of products and/or a
construction element (e.g. wall) or technical equipment (e.g. lift).
EN 15804:2012+A1:2013/prA2:2018 (E)

EN 15804:2012+A1:2013/prA2:2018 (E)
Figure 1 — Types of EPD with respect to life cycle stages covered and life cycle stages and modules for the building assessment
“.
EN 15804+A1:2013/prA2:2018 (E)
8 Modification to 5.3 “Comparability of EPD for construction products”
th th
Add a bullet (5 ) and replace the last bullet (6 ) as follows:

— the influence of the product systems on the operational aspects and impacts of the building are
taken into account;
— the elementary flows related to material inherent properties, such as biogenic carbon content, the
potential to carbonate or the net calorific value of a material, are considered completely and
consistently and the influence of the product systems on the operational aspects and impacts of the
building are taken into account.
”.
9 Modification to 5.4 “Additional environmental information”
Replace the whole content of 5.4 “Additional information” with the following:

5.4 Additional environmental information
5.4.1 General
Any additional environmental information provided shall meet the requirements in
EN ISO 14025:2010, 7.2.4, 7.2.5, 7.2.6 and 7.2.7.
In this core PCR the following categories of additional information are addressed:
5.4.2 Additional impact indicators
This core PCR includes additional environmental impact indicators. In order to acquire experience
about the calculation rules of such indicators a defined set of these LCA based additional environmental
impact indicators (see 7.2.3.2) shall be documented and explained in the project report. They may be
declared in the EPD and if declared they shall be declared as additional environmental impact
indicators including disclaimers (see 7.2.3.3). If any of these indicators are not declared in the EPD, a
justification shall be given in the EPD.
A complementary PCR (c-PCR) can define whether any additional environmental impact indicators shall
be declared in the EPD.
5.4.3 Additional information on carbon offset, carbon storage and delayed emissions
Carbon offset processes are not part of the product system under study. Carbon offset shall not be
included in the calculation of the GWP. Carbon offset information may be declared as additional
information. Such information shall be declared together with a description of calculation methodology
and sources.
NOTE A carbon offset is a reduction in emissions of carbon dioxide or other greenhouse gases made in order to
compensate for an emission elsewhere.
The effect of temporary carbon storage and delayed emissions, i.e. the discounting of emissions and
removals over a defined timeframe of up to 100 years, shall not be included in the calculation of the
GWP. The effect of permanent biogenic carbon storage shall also not be included in the calculation of
the GWP. However, the effect of carbon storage and delayed emissions may be declared as additional
information for GWP. Such information shall be declared together with a description of calculation
methodology and sources.
EN 15804+A1:2013/prA2:2018 (E)
5.4.4 Additional Information not derived from LCA
In the core PCR the following two categories of information not derived from LCA shall be addressed:
— Additional technical information, describing technical conditions underlying scenarios and
characterizing the product’s technical and functional performance during the life cycle stages other
than the product stage and for the information provided under module D “benefits and loads
beyond the system boundary” for any scenario based calculations of the LCA based indicators
(see 6.3.9 and 7.3).
— Additional information on emissions to indoor air, soil and water during the use stage, describing
release of dangerous substances into indoor air, soil and water which are not covered by LCIA. This
additional information is required (see 7.4).
NOTE Information concerning health related emissions to indoor air, soil and water supports the social
performance of buildings which is addressed in EN 16309, Sustainability of construction works — Assessment of
social performance of buildings — Calculation methodology.
“.
10 Modification to 6.2.1 “General”
Replace the 1st paragraph with the following one:
“The environmental information of an EPD covering all life cycle stages (“cradle to grave”) shall be
subdivided into the information module groups A1-A3, A4-A5, B1-B5, B6-B7, C1-C4 and module D. Only
the declaration of the modules, A1-A3, C1-C4 and D is required for compliance with this standard
(see 5.2 for exceptions). The declaration of modules A4-A5, B1-B7 is optional.”.
11 Addition of 6.3.1 “Functional or declared unit”
Add a new subclause 6.3.1 “Functional or declared unit” which reads as follows:

6.3.1 Functional or declared unit
A construction product may have a number of possible functions. Based on the goal and scope of an
EPD, the EPD may relate to a specific function and scenario using a functional unit or it may cover a
range of functionalities and scenarios using a declared unit.
Both the functional unit and declared unit provide a reference by means of which the material flows
(input and output data) for each information module of a construction product are normalized (in a
mathematical sense) to produce data, expressed on a common basis. The functional or declared unit
provides the reference for combining material flows attributed to the construction product and for the
addition of environmental impacts for the selected stages of the construction product’s life cycle at the
building level (see Figure 1 and 7.5 on aggregation). Therefore, any functional unit or declared unit shall
be clearly defined and measurable.
NOTE In this standard the term “addition” also means the calculation of environmental impacts of a building or
construction works (EN 15978) by summation of the quantified impacts per indicator and per module of the
construction products constituting the building (e.g. adding kg CO equivalents for bricks + mortar + wall
insulation+ concrete block + gypsum plaster, etc.). Limitations on the addition of indicator results across life cycle
stages and their modules are described in 7.5.”.
Change the numbering of the following clauses accordingly.
EN 15804+A1:2013/prA2:2018 (E)
12 Modification to 6.3.2 “Functional unit”
Replace the whole content of 6.3.2 “Functional unit” (former 6.3.1) with the following:

6.3.2.1 General
The functional unit defines the way in which the identified functions or performance characteristics of
the product are quantified. The primary purpose of the functional unit in LCA studies according to
ISO 14044 is to provide a reference by which material flows of construction product’s LCA results and
any other information are normalized to produce data expressed on a common basis, which allows
comparison with other product systems which have been assessed to provide the same functional unit.
NOTE 1 Comparisons of construction products with the same functional unit follow the rules in 5.3.
The functional unit of a construction product shall specify:
— the application of a product or product groups covered by the functional unit;
— reference quantity for the functional unit when integrated in the construction works;
— the quantified key properties, for the functional use or quantified performance characteristics or
minimum performance of the construction product when integrated into a building, taking into
account the functional equivalent of the building;
— the minimum performance characteristics under defined conditions shall be fulfilled over the
defined time period of the functional unit;
— a specified period of time under reference in-use conditions considering the RSL. If the functional
unit uses a different time period than the RSL, the RSL shall be given as technical information in the
EPD (see 6.3.3);
— when developing c-PCR product TCs shall specify the performance characteristics and reference in-
use conditions to be included in any functional unit.
NOTE 2 Guidance on the development of a functional unit is given in EN ISO 14040:2006, 5.2.2.
NOTE 3 Guidance on describing in-use conditions is given in Product Standards and ISO 15686-1, -2, -7 and -8.
NOTE 4 If there are, e.g. no test methods product TCs can develop RSL in accordance with ISO 15686 or use
independent empirical evidence.
6.3.2.2 Performance in a functional unit
The future function of the product within the building or construction works is often uncertain, as the
full functionality of a product may not be required at the building level. It is therefore not easy to define
a complete functional unit, which needs to include information on the required functional performance
of the product within the building or construction works over the full life cycle.
Nevertheless, for a cradle to grave EPD with functional unit a default (typical) application and the key
functionalities shall be defined. These are normally required from the product or products in this
application and provide other functional information as additional technical information.
The declared technical performance shall be based on specifications for determination or calculation of
this performance given in the relevant European harmonized Technical Specification (hEN, EAD) if
available.
“.
EN 15804+A1:2013/prA2:2018 (E)
13 Modification to 6.3.4 “Reference service life (RSL)”
Replace the whole content of 6.3.4 “Reference service life (RSL)” (former 6.3.3) with the following:

6.3.4.1 General
RSL information to be declared in an EPD covering the use stage shall be provided by the manufacturer.
The RSL shall be specified under defined reference in-use conditions. The RSL shall refer to the declared
technical and functional performance of the product within construction works. The RSL shall be
established in accordance with any specific rules given in European product standards or, if not
available, a PCR, and shall take into account ISO 15686-1, -2, -7 and -8. Where European product
standards or a c-PCR provide guidance on deriving the RSL, such guidance shall have priority.
Information on the product’s RSL requires specification of compatible scenarios for the product stage,
construction process stage and use stage. RSL is dependent on the properties of the product and
reference in-use conditions. The RSL shall be declared together with the reference in-use conditions and
it shall be stated that the RSL applies for the reference in-use conditions only.
The reference in-use conditions for achieving the declared technical and functional performance and
the declared reference service life shall include the following, where relevant:
— declared product properties (at the gate) and those of any finishes, etc.;
— design application parameters (if instructed by the manufacturer), including references to any
appropriate requirements and application codes; an assumed quality of work;
— external environment, (for outdoor applications), e.g. weathering, pollutants, UV and wind
exposure, building orientation, shading, temperature;
— internal environment (for indoor applications), e.g. temperature, moisture, chemical exposure;
— usage conditions, e.g. frequency of use, mechanical exposure;
— maintenance, e.g. required frequency, type and quality and replacement of replaceable components.
The RSL shall be justified and verifiable.
Requirements and guidance on the reference service life are given in normative Annex A.
6.3.4.2 Scenarios for RSL and functional unit
For EPD based on functional units, the reference in-use conditions used to define the RSL, functional
unit and any scenarios shall be consistent.
A declared RSL used in the functional unit shall be related to its declared functional and technical
performance and to any maintenance or repair necessary to provide the declared performance during
the RSL. Therefore any scenario included for A4, A5 and B1-B7 shall be based on the specific conditions
for the RSL. Scenarios for all modules for a cradle to grave EPD must also be consistent with the
specified conditions. (e.g. if a certain location is assumed for the construction stage, the same location
must be assumed for the use stage, end of life stage and module D).
“.
EN 15804+A1:2013/prA2:2018 (E)
14 Modification to 6.3.3 “Declared unit”
Replace the whole content of 6.3.3 “Declared unit” (former 6.3.2) with the following:
“The declared unit shall be applied if no functional unit can be defined, e.g. because a function of the
product cannot be unequivocally described because it can be used in many different ways in the context
of construction works, or when the precise function of the product or scenarios at the building level is
not stated or is unknown. The declared unit may also be used as an alternative to the functional unit.
An EPD based on a declared unit may cover all modules of the life cycle (i.e. cradle to grave) and
module D. The declared unit shall relate to the typical applications of products and their RSL.
The declared unit in the EPD shall be one of the unit types listed below. A different unit may be declared
for reasons that shall be explained. In such cases information shall be provided on how to convert this
unit to one or more of the required unit types.
— An item, an assemblage of items, e.g. 1 brick, 1 window (dimensions shall be specified);
— Mass (kg), e.g. 1 kg of cement;
— Length (m), e.g. 1 m of pipe, 1 m of a beam (dimensions shall be specified);
2 2 2
— Area (m ), e.g. 1 m of wall elements, 1 m of roof elements (dimensions shall be specified);
3 3 3
— Volume (m ), e.g. 1 m of timber, 1 m of ready-mixed concrete.
For the development of scenarios, for example for transport and disposal, conversion factors to mass
per declared unit shall be provided. Product standards or a c-PCR may require additional conversion
factors, for example to volume, for specific products.
EPD based on declared units may provide one or more alternative scenarios for its information
modules.
For the development of, for example, transport and disposal scenarios conversion factors to mass per
declared unit shall be provided. Product standards or PCR may require additional conversion factors,
for example to volume, for specific products.
EPD based on declared units can provide one or more alternative scenarios for its information modules.
NOTE 1 Reasons for declaring units other than those listed include the need to use units normally used for
design, planning, procurement and/or sale.
NOTE 2 CEN Technical Committees for product standards are expected to harmonize the declared unit to be used
for their product families.”.
15 Modification to 6.3.5.1 “Gerneral”
rd
Replace the 3 bullet in 6.3.5.1 (former 6.3.4.1) as follows:

— the “cradle to gate, modules C1–C4 and module D with options” information of a cleaning agent
used for maintenance of the product is declared in the product’s life cycle module B2
“maintenance”;
“.
Add the following paragraph before the note:
EN 15804+A1:2013/prA2:2018 (E)
“These principles are used in the following clauses and are reflected in the formulae in Annex D. These
formulae may be used as support while making calculations. No other formulae shall be used for the
implementation of the principles in this clause.”.
16 Modification to 6.3.5.2 “Product stage”
Adjust the references to the new numbering of the subclauses and add the following new paragraph at the
end:
“The system boundary with nature is defined when material flows move from natural systems to the
technosphere (i.e. when their flows caused or influenced by human technological activity) and when
emissions are released from the technosphere to the environment. The studied system should therefore
include all processes in the technosphere which are necessary to provide the functional or declared unit
of the product.”.
17 Modification to 6.3.5.4.3 “B6 – B7 use stage information modules related to the
operation of the building”
nd
Delete the note after the 2 paragraph.
18 Modification to 6.3.5.5 “End-of-life-stage”
th
Delete “optional Information” in the 5 paragraph, so the text before the list reads as follows:
“The end-of-life stage includes the modules”:.
19 Modification to 6.3.5.6 “Benefits and loads beyond the product system
boundary in module D”
nd
Replace the 2 paragraph with
“Any declared net benefits and loads from net flows (for calculation of the net amounts see 6.4.3.3)
leaving the product system that have not been allocated as co-products in the product stage and that
have passed the end-of-waste state shall be included in module D.”.
Replace the last paragraph with
“The information in module D may contain technical information as well as the quantified
predetermined LCA derived indicators. The quantified predetermined indicators shall be those
described in Clause 7.”.
20 Modification to 6.3.8 “Data quality”
Replace the overall titel “Data quality requirements” with “Data quality” and replace the whole content
with the following:

6.3.8.1 General
The quality of the data used to calculate an EPD shall be addressed in the project report (see Clause 8
and EN ISO 14044:2006, 4.2.3.6).
6.3.8.2 Data quality requirements
In addition, the following specific requirements apply for construction products:
EN 15804+A1:2013/prA2:2018 (E)
— The documentation format and data sets for the LC inventory data used in the LCA modelling shall
use ILCD format and nomenclature;
— guidance for the selection and use of generic data is provided in CEN/TR 15941;
— generic data shall be checked for plausibility;
— data sets shall be complete according to the system boundary within the limits set by the criteria
for the exclusion of inputs and outputs (see 6.3.5);
— data shall be as current as possible. Data sets used for calculations shall be valid for the current
year and represent a reference year within 10 years for generic data and 5 years for producer
specific data;
— the reference year refers to the year which the overall inventory best represents, considering the
age/representativeness of the various specific and background data included, i.e. not automatically
the year of modelling, calculation or publication year. Validity refers to the date to which the
inventory is still judged sufficiently valid with the documented technological and geographical
representativeness;
— data sets shall be based on 1 year averaged data; deviations shall be justified;
— the time period over which inputs to and outputs from the system shall be accounted for is
100 years from the year for which the data set is deemed representative. A longer time period shall
be used if relevant;
— the technological coverage shall reflect the physical reality for the declared product or product
group by as far as possible taking into account:
— representativeness for the technology mix and location type stated in the documentation;
— the geographical coverage shall reflect the physical reality for the declared product or product
group by as far as possible taking into account:
— technology representativeness for the region/country stated;
— input materials representativeness for the region/country stated;
— input energies representativeness for the region/country stated.
6.3.8.3 Scoring relevant generic data
Data sets for relevant generic data (see Table 1) applicable for this standard shall be scored in order to
assess the data quality. The scoring shall at least be based on:
— time-related representativeness;
— technological representativeness;
— geographical representativeness;
— precision or uncertainty.
The method used to perform the scoring shall be documented in the project report.
EN 15804+A1:2013/prA2:2018 (E)
When selecting data sets the scoring should be explained in the project report for those data sets with a
poor or very poor score and having a high influence on the results of the LCA.
NOTE 1 The term “relevant generic data” is understood as data with a major impact on a single impact category
in module A1-A3.
NOTE 2 There are several methods for scoring. An example based on the PEF method is given in informative
Annex E.
“.
21 Modification to 6.3.9 “Developing product level scenarios”
Delete the first paragraph.
nd
Replace “parameters” with “indicators” in the former 2 paragraph und add the following new
paragraph behind it:
“Scenarios shall support the calculation of information modules covering processes that deal with any
one or all of the life cycle stages of the construction product except for modules A1 to A3; scenarios
shall support the assessment of the environmental performance of a building in its life cycle stages
“construction, use stage, end of life” (see Figure 1).”.
Replace the last paragraph with the following one:
“Scenarios are communicated in accordance with 5.4. For EPD that declare any or all modules beyond
the production stage, the additional technical information related to the scenarios underlying these
modules are a required part of the information of the declared information modules. See also 7.3.”.
22 Modification to 6.4.3.1 “General”
Add the following new paragraph at the end:
“Irrespective of the allocation approach chosen for a co-production process or for secondary flows
crossing the system boundary between product systems, specific inherent properties of such
coproducts or flows, for example calorific content, composition [biogenic carbon content,
CaO/Ca(OH)2 content, etc.], shall not be allocated but always reflect the physical flows.”.
23 Modification to 6.4.3.3 “Allocation procedure of reuse, recycling and recovery”
nd
Replace “informative module D” with “module D” in the 2 paragraph.
24 Addition of 6.4.4 “Environmental information on biogenic carbon inventory
data”
Add the new subclause 6.4.4 “Environmental information on biogenic carbon inventory data” with the
following:

6.4.4 Environmental information on biogenic carbon inventory data
6.4.4.1 LCI based indicators describing biogenic carbon removals and emissions
Biogenic carbon contained in bio-based materials (as material in product, packaging or fuel) shall be
declared as kg C per functional unit or declared unit for
— the removal of the greenhouse gas CO from the atmosphere incorporated/sequestered by bio-
based materials used in the product system under study;
EN 15804+A1:2013/prA2:2018 (E)
— the emissions of biogenic carbon as CO , CH , etc., to the atmosphere originated by bio-based
2 4
materials used in the product system under study. The declared inventory data of emissions shall
be aggregated across different substances (CO , CO, CH , etc.);
2 4
— biogenic carbon entering the product system from a previous product system as a negative
transfer;
— biogenic carbon leaving the product system to the next product system as a positive transfer;
— biogenic carbon remaining in landfill after 100 years since deposition as a positive transfer.
All biogenic carbon removals, emissions and transfers shall be declared in the module where they occur.
NOTE These inventory indicators describing removals, emissions, transfers of biogenic carbon and biogenic
carbon stored in landfill after 100 years are declared regardless of their origin (whether or not from sustainably
managed sources).
For the calculation of biogenic carbon flows all allocation rules apply as for other flows, see 6.4.3.
In the case of EPD declared as cradle to gate, excluding modules C1-C4 and module D, the end of life of
the product is not known and the carbon content is therefore reported as a transfer at the factory gate.
6.4.4.2 Information on biogenic carbon content
The biogenic carbon content quantifies the amount of the biogenic carbon in a construction product
leaving the factory gate, and it should be separately declared for the product and for any accompanying
packaging (see 7.2.5).
NOTE The biogenic carbon content of wood based products is calculated in accordance with EN 16449, Wood
and wood-based products — Calculation of the biogenic carbon content of wood and conversion to carbon dioxide.
If the total mass of biogenic carbon containing materials is less than 5 % of the total mass of the product
and accompanying packaging, the biogenic carbon content may be omitted.
The criteria for excluding the declaration of biogenic carbon content are intended as an aid to efficient
calculation and any use of the criteria for exclusion shall be documented.“.
25 Modification to 6.5 “Environmental information on biogenic carbon inventory
data”
Replace the whole title and content of 6.5 “Impact assessment” with the following:

6.5 Environmental information on biogenic carbon inventory data
6.5.1 General
The information on environmental impacts is expressed with the impact category indicators of Life
Cycle Impact Assessment (LCIA) using characterization factors in a LCIA according to ISO 14040 /
ISO 14044. Information on the impact categories, indicators, characterization methods, units and
characterization factors to be applied is stated in Annex C.
The EPD shall contain a core set of pre-determined environmental impact indicators. The EPD may also
contain additio
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