ELECTRONIC SUPPLEMENTARY MATERIAL 1. Review of available LCA data and databases in the European context This review covers both generic LCA data (coming from generic databases e.g. Ecoinvent (Ecoinvent 2012)) and industry average data (provided by manufacturers or trade unions) that can be expressed as the so-called Environmental Product Declaration (EPD). Different scales are considered i.e. both European and national databases of the various European countries. For each of these datasets or databases, the related assumptions are presented in terms of scope definition (e.g. cut-off rules, allocations), life cycle inventory (LCI) flows, life cycle impact assessment (LCIA) indicators and methods. International LCA datasets were restricted to Europe because datasets from outside do not comply from the beginning with the representativeness criteria in terms of geographic coverage and their technologic hypotheses are more likely to differ from European practices. There are two main types of LCA datasets: EPD or generic LCA data. The former is more suitable to be used in a detailed design stage (or at on-site assessment or building certification), while the latter can be either European or national and meets the requirements for the early conceptual design stage (when no detailed information is available for the product). Therefore, data genericness and LCA uncertainty decrease as design detail increases. This section of the OR1 describes these two types of LCA datasets, along with country-specific and average LCA datasets that are also available in the European context. The number of available datasets is growing in all the referred groups, increasing therefore the importance and the need of the methodology proposed in this paper. 1.1. Multi-sectorial generic LCA databases Multi-sectorial generic LCA databases are summarised in Table S1. A generic database includes various datasets that reflect the various economic sectors, such as upstream processes (e.g. energy production, transportation, building products, agriculture, etc.) or downstream processes (e.g. disposal or recycling), along with data from production and processing processes. These data can be either linked through a network of unit processes (e.g. Ecoinvent) or be compiled in a single database as cumulative LCI (e.g. ELCD or GaBi). These data are usually available in commercial LCA software (CfD 2001; EC 2009; PRé 2009; Ferrão 1998; SM - 1 Lasvaux et al. 2011). 1.2. Country-specific and European average LCA datasets In addition to the generic LCA databases, several country-specific or European average LCA datasets have been established and are described in Table S2 and SM - 2 Table S3. Average LCA datasets belong to the “average” group but are often considered generic (Figure 2 of the paper), namely when the identification of the plants and/or companies included in the study are omitted in the meta data. 1.3. Environmental Product Declaration programs These data refers to type III environmental product declarations (EPD). They are defined in detail in ISO 14025 (ISO 2006a). The Technical Committee (TC) 350 of the European Committee for Standardization (CEN/TC 350) is devoted to “Sustainable construction” and is developing, within its Workgroups (WG), standards related to EPDs (Ekvall 2005; Krigsvoll et al. 2007). SM - 3 Table S4 presents a summary of the EPD programs available in the European context that include construction products. An EPD is voluntarily developed and presents quantified LCA-based information over the life cycle of a product. Type III environmental declarations are based on: Data related to the LCA of a product, which is independently verified; Modules of information, in accordance with international standards related to LCA: ISO 14040:2006 and ISO 14044:2006 (ISO 2006b, c); Results of the analysis of the “Life cycle inventory” (LCI); Additional environmental information, when adequate. These declarations are developed within each EPD program. This kind of program has a coordinator who can be a company, a group of companies, an industrial sector, a trading association, a public agency (e.g. a standardisation entity), or an independent scientific body. The coordinator manages its development and the certification process. EPDs represent a complete, robust and scientifically validated source of information on the environmental impacts of a product throughout its life cycle included in the study. The development of EPDs within this kind of program also eases the comparison of the results between products (Rocha 2010). The production of Product Category Rules (PCR) for EPD enables the harmonisation of the information collected and the LCA methodology used. PCRs are developed specifically for each family of products (e.g. wood, cement-based or ceramic products) to allow comparing results between products with similar functions or applications and achieving verifiable and consistent results (Silva et al. 2007). PCRs can be a set of rules, requirements or guidelines to develop Type III environmental declarations for one or more product categories, which are defined in accordance with interested parties. It must be possible to apply the same “functional equivalent” to the products of the same category, in order to achieve a quantified performance by functional unit. PCR harmonisation among EPD programs is stimulated at an international level to satisfy the comparability principle (Almeida 2010; I.EPDS. 2010). However, each EPD database has unique characteristics, namely background data, methodology and data origin that may result in significant differences in the LCA results for each construction product. The publicly available EPD documentation is also very often incomplete concerning the data origin and the methodology of calculation, increasing the risk of misunderstanding by the final user. Yet, the methodological report, which is most of the time kept confidential, should report all the hypotheses as in any LCA study. As a result, the choice of the data to be used in every national context should be cautious, especially if the aim is to use SM - 4 them as a national proxy data, by considering all the complementary information included in the EPD (meta data) (Hodková and Lasvaux 2012). Table S5 presents a summary of the types of EPD available in the French EPD system (INIES) and the German system (IBU). The types of EPD are also compared according to the TR 15941 technical report of CEN TC/350 concerning the methodology for selection and use of generic data.(CEN 2010). Table S5 shows that there is not yet a harmonisation of the names of each type of EPD in each national context. For example, an average data of different manufacturers is defined as: “Average” data in CEN Technical Report TR 15941(CEN 2010); “Manufacturer group declaration” in the German IBU database; “Joint EPD” in the French INIES database, The two last ones are identical (except for the English translation name). Yet, one can see in Table S5 and Fig. 2 of the paper that the “average” term, as defined in the Technical Report TR 15941, also covers the average of different production sites (for the same product or for a branch of products) of the same manufacturer. For these datasets, it is important to note down their representativeness in terms of market share, when available. Although it is advisable to always follow standardised terminology, INIES’ terminology will be followed in this research work to identify each EPD document in a result of the analysis presented in Table S5. SM - 5 Table S1 - Description of LCA generic datasets Designation of the database Country Webpage Ecoinvent Ecoinvent version 2.2 Switzerland www.ecoinvent.ch ELCD European Life Cycle Database version 2.0 European Union (EU) http://lca.jrc.ec.europa.eu/ lcainfohub/datasetArea.vm. European Platform for LCA GaBi GaBi Germany www.gabi-software.com/databases/ PE International Organisation responsible for the Swiss Centre for Life Cycle Inventories data GaBi methodology, compliant with the ISO Methodological rules followed Ecoinvent methodology according to ELCD methodology follows ISO 14040:2006, IS0 14040-44:2006 ISO 14044:2006 14044, ISO 14064 and ISO 14025 standards. Fees (for getting access to the full Public (free to use) Fees (depending on the data provided) Availability of data (public/fees) database) 4,000 processes provided for both 300 cumulative LCI of processes supplied by 4,500 ready-to-use Life Cycle Inventory profiles Number of data available unit process raw data and cumulative associations of producers from EU and by other LCI sources for the most common materials, energy suppliers, transports and waste management Generic data (based on average from Generic data (based on average from industry) Generic data (based on primary data collection Type of LCA data industry, survey or literature) during work with companies, associations and public bodies) Not possible (only aggregated datasets are Possibility of data contextualisation Possible with a LCA software using Not possible (only aggregated datasets are pubunit processes Ecoinvent data licly provided) publicly provided) by the LCA practitioner Internal External validation (Fraunhofer Institute for Critical review/verification of the Internal critical review (Frischknecht et al. 2007) Building Physics, Stuttgart, Germany) data/database SM - 6 Table S2 - Description of country-specific LCA datasets Designation of the database ATILH Inventaires de Cycle de vie CEMBUREAU CEMBUREAU Portuguese average LCA dataset Environmental declarations program in the ceramic industrial sector Portugal - France Europe www.infociments.fr/developpementwww.cembureau.be durable/construction-durable/icv-ciments Organisation responsible for the Association Technique de l’Industrie des European Cement Association (CEMBUREAU) Technological Centre for Ceramic and Glass Liants Hydrauliques (ATILH) (CTCV); Portuguese Association of the data Ceramic Industry (APICER) French standard NF P01-010 (for the Based on ISO 14020:2005, ISO 14025:2006, ISO ISO 14040:2006, ISO 14044:2006; NationalPCR followed methodology) 14040:2006, ISO 14044:2006; PCR 2004:1 for based development for each group of materipreparing an EPD for Product Group “Cement” als (Environdec) Public Public (available in ELCD and in Environdec) Public Availability of data (public/paid) 9 1 4 Number of data available Country average (weighted mean) European average Country average by use Type of data Not possible (due to confidential industry Possibility of data contextualisa- Not possible (due to confidential industry Not possible (due to confidential industry data) data) data) tion by the LCA practitioner External critical review External critical review External critical review Critical review/verification Country Webpage SM - 7 Table S3 - Description of European average LCA datasets Designation of the database Plastics Europe 2005 PU-Europe Plastics Europe Eco-profile and EPD Program PU Europe calculation tool European European Country www.plasticseurope.org. www.pu-europe.eu Webpage Plastics Europe – Association of Plastics Manufacturers PU Europe - European association of PU insulation manufacturers Organisation responsible for the data LCI methodology and PCR for Uncompounded Polymer resins and European Standards (CEN/TC 350) PCR followed reactive polymer precursors Public Public Availability of data (public/paid) Eco-profiles of almost every plastic product available in the market 2 Number of data available European average European average Type of data External Not possible (due to confidential industry data) Possibility of data contextualisation by the LCA practitioner Not possible (due to confidential industry data) Not possible (due to confidential industry data) Possibility of data contextualisation by the LCA practitioner External critical review External critical review Critical review/verification SM - 8 Table S4 - Characterisation of EPD programs that include construction products Designation of the EPD Program BRE Environmental profiles DAPc Environdec IBU INIES Norwegian EPD Foundation Declaración Ambiental International EPD Sys- Umwelt-Deklarationen (EPD) Programme de Décla- Norwegian EPD Foundation de Produto (DAPc) tem ration Environnementale et Sanitaire pour les produits de construction United Kingdom Spain Sweden (origin) Germany France Norway Country www.greenbookliv es.csostenible.net/dapc/ www.environdec.com www.bau-umwelt.com/ www.inies.fr www.epd-norge.no/ Webpage e.com el-sistema-dapc https//:epd-online.com Manager of the Building Research Col·legi d´Aparelladors, Swedish Environmental Institut Bauen und Umwelt Ten French organiza- Confederation of Norwegian Establishment Arquitectes Tècnics i Management Council tions (governmental, Enterprise (NHO); Federation EPD Program Enginyers d'Edificació de scientific and industrial) of Norwegian Building Barcelona e Generalitat Industries (BNL) de Catalunya; Generalitat de Catalunya PCR followed Methodology for National-based develop- Per group of materials EN 15804:2012 (most recent French standard NF National-based development environmental ment for each group of EPDs); National-based P01-010 for each group of materials profiles of conmaterials development for each group struction products of materials (2007) Public Public Public Public Public Public Availability of data (public/paid) More than 250 10 44 of construction mate- 700 building products, divid963 individual or 73 building products, divided Number of data EPDs rials, divided in 8 groups ed in 10 groups and including average/joint EPD in 10 groups and including available floor and roof coverings, covering 10,301 com- concrete, cement, building masonry, wood-based and mercial references boards and insulation materiinsulation materials als Not possible (due to Not possible (due to Not possible (due to confiNot possible (due to Not possible (due to confiPossibility of data Not possible (due confidential industry confidential industry dential industry data) confidential industry dential industry data) contextualisation to confidential industry data) data) data) data) by the LCA practitioner No External External review and Third party verification Third-party verification Third-party verification Critical reapproval by an accredited following ISO 14025 (com(not mandatory) view/verification certification body pulsory) SM - 9 Table S5 - Types of EPD documents and corresponding LCA data terminology (for a single product or an averaged product) LCA data terminology Data included in the EPD (for the same functional unit) Data from one manufacturer and site Average data of different production sites of the same manufacturer Average data of different manufacturers TR 15941:2010 (CEN 2010) Site specific Average (from different manufacturers or production sites) EPD Program IBU INIES Manufacturer´s Individual declaration EPD Manufacturer group declaration Joint EPD SM - 10 1.4. Other LCA and EPD databases As part of the available LCA databases, a recently developed Excel based LCI database at the Scientific and Technical Centre for Buildings (CSTB) in France (Lasvaux et al. 2010) was also considered. Generic LCI data was collected in a private Excel-spreadsheet database (called SLCA for Simplified Life Cycle Assessment) using harmonised LCI flows and LCIA indicators, for both cradle to gate and cradle to grave data of building products. LCI data were taken from mainly two databases (EPD database INIES and generic LCA database Ecoinvent version 2.01) adding up to around 750 processes (600 LCI data from INIES, 130 from Ecoinvent and some more from IBU and ELCD) with the help of a harmonised terminology and meta data. These data cover specific, average and generic data for building products according to the ILCD Handbook definitions. For the processes from both databases, 168 LCI flows (based on French EPD nomenclature1) were inventoried in order to make possible the integration of the French EPD Life Cycle Inventory within the database. The accuracy of the Environmental Impact Assessment Methods (EIAM) was identified using simplified LCI (Lasvaux et al. 2012). Processes imported from Ecoinvent included transport, energy, waste treatment, water and end-of-life options. Data from INIES correspond to LCI and LCIA data - cradle to grave - available in each EPD according to the French standard (AFNOR 2004; Lasvaux et al. 2011; Lasvaux 2010; AFNOR 2014). Based on the selected LCI flows of each of the 750 processes, 20 LCIA indicators were calculated using 15 usual EIAM. Then, the LCIAs of each process were decomposed according to the building life cycle stages given in French and European Standards (CEN 2012; AFNOR 2004): production, transport to the building site, on-site implementation, use phase and end-of-life. Next, analyses on life cycle stages contributions were made for the production of each of construction material and product. Finally, the most documented families of products (i.e. glass wool, rock wool, concrete, steel) had been studied in detail within each environmental impact category in order to access the suitability of LCA data to the French context. This study included the comparison of the results of each database and the identification and explanation of the differences found (Lasvaux et al. 2011; Lasvaux 2010). 1.5. LCI flows and LCIA indicators available in each database Generic LCA databases can present more than 1,000 LCI flows for each process following 1 www.aimcc.org/pages/documents/PUB05008.doc SM - 11 general guidelines for multi-sectorial databases (UNEP 2011). On the other hand, an EPD can only display from 3 to 168 LCI flows (depending on the EPD program), in addition to LCIA indicators. Therefore, when the aim is to compare results for the same products but from different databases, a first step must be completed to define the LCI and LCIA indicators to be considered in the study. Table S6 summarises the LCI flows included in each country-specific and European average LCA datasets and EPD program and Table S7 includes a balance of the EIAM used in these datasets to calculate each LCIA indicator. The new European Standards (FprEN 15804:2011 and prEN 15978:2011 (CEN 2012, 2011)) that support the Environmental assessment of buildings also outline the LCI and LCIA indicators that should be included in an EPD. In what concerns LCI flows, the following are referenced (CEN 2012): Resource use: Renewable primary energy consumption (excluding renewable primary energy resources used as raw materials); use of renewable primary energy resources used as raw materials, total use of renewable primary energy resources (primary energy and primary energy resources used as raw materials), non-renewable primary energy excluding non-renewable primary energy resources used as raw materials, non-renewable primary energy resources used as raw materials; total use of non-renewable primary energy resources (primary energy and primary energy resources used as raw materials); use of secondary material, renewable secondary fuels, non-renewable secondary fuels, and fresh water; Waste categories: hazardous, non-hazardous, and radioactive waste disposed; Output flows: components for re-use, materials for recycling, materials for energy recovery and exported energy. In terms of LCIA indicators, European standards determine seven to be taken into account in future European harmonised EPD (CEN 2012): GW - Global warming; ODP - Ozone depletion; AP - Acidification of land and water; EP - Eutrophication; POCP - Photochemical ozone creation; ADP - Depletion of abiotic resources (elements/non fossil resources) and depletion of abiotic resources (fossil). SM - 12 Table S6 - LCI flows included in each country-specific and European average LCA datasets and EPD program Country-specific and European average LCA datasets / Water EPD program cons. X ATILH LCI flows CO2 emissions Electric Dust energy cons. Land transf. Biomass Fossil Radioactive Inert X X X X X Nuclear (higher Total waste X BRE level) disposal X X X X CEMBUREAU According with European Standards DAPc X * * X * * Environdec X X (including radioactive) X X IBU 168 (including water and electric energy consumption, hazardous, non-hazardous, radioactive and inert waste production, recycled waste, and INIES emissions to the air - including dust - and water) X Reuse/recycling, energy production, to landfill* X Total X Norwegian EPD Foundation X Recycled Portuguese average LCA X* X X X* waste dataset X X X PU-Europe SLCA (developed by one of X X X X X X (Partial) X X X the authors of this paper) Note: * - Not supplied for all products Hazardous X Human toxicity and ecotoxicity to land and freshwater (CML 2000) X Waste Non-Hazardous X SM - 13 Table S7 - EIAM used in each country-specific and European average LCA datasets and EPD program to calculate each LCIA indicator Country-specific and European average LCA datasets/EPD program EIAM used to calculate each LCIA indicator Resources with energy content NonRenewable renewable NF P01-010 ATILH GWP ODP - - CEMBUREAU X X CML 2000 IPCC 2001 100 years Nordic Guidelines on LCA 1992* X X X X NF P01-010 X (kWh) X (kWh) - X CML 1999 IPCC 2001 100 years Nordic Guidelines on LCA 1992* CML 1999 POCP NF P01-010 (based on CML 2001 for mid-point indicators) Minerals Resource Extraction (ton); Fossil fuel depletion (MJ) CML 2000 CML 2001 v. 2.05 CML 1999; Nordic Guidelines on LCA 1992; Heijungs et Environmental Assessment of Prodal. 1992 ucts - Denmark 1992; CML, 1999 IPCC (last version) Note: * - Not supplied for all products. *2- plus air pollution. X X - CML 2001 NF P01-010 (based on CML 2001 for mid-point indicators) IPCC (last CML 2001 version) CML 1999; Nordic Guidelines on LCA 1992; Heijungs et Environmental Assessment of Prodal. 1992 ucts - Denmark 1992; CML, 1999 NF P01-010* NF P01-010 CML 2001 CML 2001 According with the European standard FprEN 15804:2011 PU-Europe SLCA*2 EP According with European Standards DAPc IBU INIES*2 Norwegian EPD Foundation Portuguese average LCA dataset ADP NF P01-010 (based on CML 2001 for mid-point indicators) BRE Environdec AP - CML 2001 According with the European standard FprEN 15804:2011 NF P01-010; CML 2001 SM - 14 European Standard FprEN 15804:2011 refers a EIAM that do not exist yet (characterisation factors applied in ELCD) to calculate each LCIA indicator, except for the characterisation factor for ADP (elements and fossil). For the latter, CML (developed by the “Institute of Environmental Sciences” at the Faculty of Science of the University of Leiden, in the Netherlands) EIAM should take into account. CML had a first version (CML 92) and two main updates (CML 2 baseline method 2000 and CML 2001, from which a version 2.05 is already available). This EIAM uses a midpoint approach that converts LCI flows into midpoint impacts (e.g. potential of ozone layer depletion or greenhouse effect). 1.6. Life cycle stages covered by each dataset The review of available LCA datasets of building products already presented in OR1 included the analysis of the life cycle stages covered by each one based on European standards nomenclature (Table S8 and SM - 15 Table S9). From this analysis it is shown that all datasets cover at least the product stage (cradle to gate: A1-A3 - Table S8). Some EPD datasets may include additional life cycle stages such as the construction process stage (A4-A5) and, rarely, the use stage (B1-B7). Several data are available in all types of databases concerning the end-of-life stage (C1-C4) and, more rarely, from the “Benefits and loads beyond the system boundary” (D). In addition, most of EPDs include aggregated data ( SM - 16 Table S9) either from the production to the end-of-life of the product or within a module (e.g. aggregated value for end of life). One of the most significant barriers for intercomparing all these LCA datasets (along with the methodological choices) is the different level of aggregation of the data in relation to the sub-modules defined in the European standards FprEN 15804 and FprEN 15978 (CEN 2012, 2011)). The information included in EPD related with all the stages after the production (B, C or D) is based on scenarios, which are mostly built and assessed using generic LCA data (similarly to the approach commonly used to model upstream processes, as the production of raw materials) ( SM - 17 Table S10). Following this approach, generic data for scenarios should be “as realistic as possible and properly documented (covering the present or anticipated situation), rather than idealistic or "carefully selected"” (CEN 2010), and the assumptions made for each stage should be inter-related. For instance, construction process scenarios are important not only to the construction stage, but also to the use and end-of-life stages. On the other side, scenarios describing end-of-life stage (downstream processes - see SM - 18 Table S10) should reflect current technology, present regulations, today's average practice and a mix of end-of-life treatments available at the national or regional level (CEN 2010). SM - 19 Table S8 - Life cycle stages classification based on French and European standards (CEN 2012; AFNOR 2004) LCA boundaries Cradle to cradle Standard Cradle to gate Production Cradle to grave Gate to grave Implementation Utilisation Transportation End-of-life NF P01-010 FprEN Product stage (A1-A3) Construction process stage (A4-A5) Use stage (B1-B7) End-of-life stage (C1-C4) Benefits and loads beyond the system boundary (D) 15804:2011 SM - 20 Table S9 - Detailed life cycle stages classification based on European standards (CEN 2012) Modules Product stage (A1-A3) Construction process stage (A4-A5) Use stage - information modules related to the building fabric (B1-B5) Use stage - information modules related to the operation of the building (B6-B7) End-of-life stage (C1-C4) Benefits and loads beyond the system boundary (D) A1 A2 A3 A4 A5 B1 B2 B3 B4 B5 B6 B7 C1 C2 C3 C4 D Life cycle stage designation and description Raw material extraction and processing, processing of secondary material input Transport to the manufacturer Manufacturing Transport to the building site Installation into the building Use or application of the installed product Maintenance Repair Replacement Refurbishment Operational energy use Operational water use Deconstruction, demolition Transport to waste processing Waste processing for reuse, recovery and/or recycling Disposal Reuse, recovery and/or recycling potentials SM - 21 Table S10 - Type of data - generic and site-specific - used on EPD for each life cycle stage (CEN 2012) Product stage (A1-A3) Construction process stage (A4-A5) Production of raw materials Product manufacture Upstream processes Processes the manufacturer has influence over Process type Generic data Manufacturer´s average or site-specific data Data type Modules Use stage End-of-life Benefits and loads beyond (B1-B7) stage (C1-C4) the system boundary (D) Downstream processes Generic data SM - 22 References of the supporting material AFNOR (2004) Qualité environnementale des produits de construction. NF P01-010. AFNOR, France AFNOR (2014) Environmental and health product declaration program for construction products "EHPD Program". Version B revised on June 2014 - NF EN 15804+A1 and XP P01-064/CN. AFNOR, France Almeida MI (2010) EPD development in the ceramic sector (in Portuguese). Paper presented at the Construction Materials and Sustainability (Materiais de construção e Sustentabilidade), Coimbra, Portugal, 16 de Junho de 2010 CEN (2010) Sustainability of construction works - Environmental product declarations Methodology for selection and use of generic data. TR 15941. Comité Européen de Normalisation, Brussels, Belgium CEN (2011) Sustainability of construction works - Assessment of environmental performance of buildings - Calculation method. EN 15978. Comité Européen de Normalisation, Brussels, Belgium CEN (2012) Sustainability of construction works - Environmental product declarations - Core rules for the product category of construction products. EN 15804. 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