End-of-Life Scenarios for Mass Timber: Assumptions, Limitations and Potentials—A Literature Review
Source abstract
Abstract
This paper presents a literature review exploring the end-of-life (EoL) scenarios for mass timber, focusing on Life Cycle Assessment (LCA), Environmental Product Declarations (EPDs), and circular principles. Despite its claimed environmental benefits, significant gaps exist in standardising LCA methodologies, including inconsistent system boundaries, challenges with time-dependent emissions, and limited integration of circular strategies. The literature review evaluates four primary EoL scenarios: reuse, recycling, energy recovery, and landfill. Reuse is identified as the most sustainable option, extending material lifespans and minimising environmental impacts, followed by recycling. Energy recovery is considered a fallback, while landfill remains the least desirable. Design for Disassembly and Reuse (DfD&R) is highlighted as critical for promoting circularity, though economic, market, and regulatory barriers hinder widespread adoption. The conclusion of this literature review calls for several thematic topics including harmonised LCA practices, policy reforms, and industry awareness to optimise EoL strategies for mass timber. By addressing these challenges, the building sector can better align with circular economy goals, reducing environmental burdens and supporting global climate targets.
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Research context
OpenAlex topics: Architecture and Computational Design
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Affiliations
Department of Architecture and Arts, Iuav University of Venice, Santa Croce 1336, 30135 Venice, Italy
References (70)
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1. UNFCCC—United Nations Framework Convention on Climate Change (2015). The Paris Agreement, UNFCCC. Available online: https://unfccc.int/process-and-meetings/the-paris-agreement/the-paris-agreement.
2. EC—European Commission (2024, December 10). Communication ‘Fit for 55’: Delivering the EU’s 2030 Climate Target on the Way to Climate Neutrality. Available online: https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX:52021DC0550&from=EN.
3. Van den Auwelant, E., Nimmegeers, P., and Van Passel, S. (2024). Life Cycle Assessment and Circular Practices in the Woodworking Sector: A Systematic Review. Clean Technol. Environ. Policy.10.1007/s10098-024-02915-x ↗
4. Decarbonization Possibilities for Affordable Timber Houses. An LCA Comparison of Business as Usual and Circular Strategies
5. Product Design and Business Model Strategies for a Circular Economy
6. Konietzko, J., Bocken, N., and Hultink, E.J. (2020). A Tool to Analyze, Ideate and Develop Circular Innovation Ecosystems. Sustainability, 12.10.3390/su12010417 ↗
7. UNEP—United Nations Environment Programme (2020). Building Materials and Climate: Constructing a New Future, UNEP. Available online: https://www.unep.org/resources/report/building-materials-and-climate-constructing-new-future.
8. Life Cycle Assessment. Different models for different purposes10.1111/jiec.12157 ↗
9. (2012). Sustainability of Construction Works—Assessment of Environmental Performance of Buildings—Calculation Method (Standard No. EN 15978:2012).
10. How Can the Ambitious Goals for the EU’s Future Bioeconomy Be Supported by Sustainable and Efficient Wood Sourcing Practices?10.1080/02827581.2016.1240228 ↗
11. Overview of Cross-Laminated Timber (CLT) and Timber Structure Standards across the World
12. Wood Use in Nonresidential Buildings: Opportunities and Barriers
13. Wood Buildings as a Climate Solution10.1016/j.dibe.2020.100030 ↗
14. Comparative Life-Cycle Assessment of a Mass Timber Building and Concrete Alternative10.22382/wfs-2020-019 ↗
15. Massive Timber Building Vs. Conventional Masonry Building. A Comparative Life Cycle Assessment of an Italian Case Study10.1088/1755-1315/323/1/012016 ↗
16. Whole Life Embodied Emissions and Net-Zero Emissions Potential for a Mid-Rise Office Building Constructed with Mass Timber
17. A Comparative Cradle-to-Gate Life Cycle Assessment of Mid-Rise Office Building Construction Alternatives: Laminated Timber or Reinforced Concrete10.3390/buildings2030245 ↗
18. Cross-Laminated Timber for Building Construction: A Life-Cycle-Assessment Overview10.1016/j.jobe.2022.104482 ↗
19. Dynamic Life Cycle Carbon and Energy Analysis for Cross-Laminated Timber in the Southeastern United States10.1088/1748-9326/abc5e6 ↗
20. Prolonging Life Cycles of Construction Materials and Combating Climate Change by Cascading: The Case of Reusing Timber in Finland10.1016/j.resconrec.2021.105555 ↗
21. (2013). Sustainability of Construction Works—Environmental Product Declarations—Core Rules for the Product Category of Construction Products (Standard No. EN 15804:2012+A1:2013).
22. (2019). Sustainability of Construction Works—Environmental Product Declarations—Core Rules for the Product Category of Construction Products (Standard No. EN 15804:2012+A2:2019).
23. Modular Multi-Storey Construction with Cross-Laminated Timber: Life Cycle Environmental Implications
24. Moher, D., Liberati, A., Tetzlaff, J., and Altman, D.G. (2009). Preferred Reporting Items for Systematic Reviews and Meta-Analyses: The PRISMA Statement. PLoS Med., 339.10.1136/bmj.b2535 ↗
25. Cross-Laminated Timber (CLT)—A State of the Art Report
26. Di Ruocco, G., Melella, R., and Sabatano, L. (2023). Timber Buildings Deconstruction as a Design Solution toward Near Zero CO2e Emissions. Buildings, 13.10.3390/buildings13010157 ↗
27. A Life Cycle and Product Type Based Estimator for Quantifying the Carbon Stored in Wood Products10.1186/s13021-022-00220-y ↗
28. Understanding the Benefits and Challenges of Harvested Wood Products in Response to Climate Change10.1016/j.resconrec.2024.107739 ↗
29. The Influence of System Boundaries and Baseline in Climate Impact Assessment of Forest Products10.1007/s11367-018-1495-z ↗
30. Temporally-Differentiated Biogenic Carbon Accounting of Wood Building Product Life Cycles10.1007/s42452-020-03979-2 ↗
31. Hart, J., and Pomponi, F. (2020). More Timber in Construction: Unanswered Questions and Future Challenges. Sustainability, 12.10.3390/su12083473 ↗
32. Considering Time in LCA: Dynamic LCA and Its Application to Global Warming Impact Assessments10.1021/es9030003 ↗
33. Conceptual Issue of the Dynamic GWP Indicator and Solution10.1007/s11367-022-02028-x ↗
34. Ahn, N., Bjarvin, C., Riggio, M., Muszynski, L., Schimleck, L., Pestana, C., Dodoo, A., and Puettmann, M. (2023, January 19–22). Envisioning Mass Timber Buildings for Circularity: Life Cycle Assessment of a Mass Timber Building with Different End-Of-Life (Eol) and Post-Eol Options. Proceedings of the 13th World Conference on Timber Engineering (WCTE 2023), Oslo, Norway.10.52202/069179-0466 ↗
35. Biogenic Carbon in Buildings: A Critical Overview of LCA Methods10.5334/bc.46 ↗
36. Accounting for Biogenic Carbon and End-of-Life Allocation in Life Cycle Assessment of Multi-Output Wood Cascade Systems10.1016/j.jclepro.2020.122795 ↗
37. Key Issues and Options in Accounting for Carbon Sequestration and Temporary Storage in Life Cycle Assessment and Carbon Footprinting10.1007/s11367-012-0451-6 ↗
38. Approaches for Inclusion of Forest Carbon Cycle in Life Cycle Assessment—A Review10.1111/gcbb.12016 ↗
39. Goodbye to Carbon Neutral: Getting Biomass Footprints Right10.1016/j.eiar.2008.11.002 ↗
40. Timber and Carbon Sequestration
41. Recycling and End-of-Life Scenarios for Timber Structures10.1007/978-94-007-7811-5_8 ↗
42. European Environment Agency (EEA) (2024, December 10). Recycling. EEA Glossary of Terms. Available online: https://www.eea.europa.eu/help/glossary/eea-glossary/recycling.
43. Design Strategies to Increase the Reuse of Wood Materials in Buildings: Lessons from Architectural Practice10.1016/j.jclepro.2022.133083 ↗
44. Polastri, A., Fanti, R., Rigo, P., and Demarchi, E. (2023, January 19–22). Investigation of A Novel Timber-Mortar Constructive System. Proceedings of the 13th World Conference on Timber Engineering (WCTE 2023), Oslo, Norway.10.52202/069179-0456 ↗
45. Design Concept for Prefabricated Elements from CDW Timber for a Circular Building10.1088/1755-1315/323/1/012022 ↗
46. Quantifying the Environmental Impact of Structural Timber across Multiple Future Lifecycles10.1007/s42452-024-05860-y ↗
47. Han, L., Pauliny, D., Sandak, A., Riggio, M., Kutnar, A., Sandberg, D., and Sandak, J. (2023, January 19–22). Densified wooden nail for adhesive- and metal-free timber assembles. Proceedings of the 13th World Conference on Timber Engineering (WCTE 2023), Oslo, Norway.10.52202/069179-0090 ↗
48. Dry Matter Losses and Methane Emissions During Wood Chip Storage: The Impact on Full Life Cycle Greenhouse Gas Savings of Short Rotation Coppice Willow for Heat10.1007/s12155-016-9728-0 ↗
49. Derwent, R.G. (2020). Global Warming Potential (GWP) for Methane: Monte Carlo Analysis of the Uncertainties in Global Tropospheric Model Predictions. Atmosphere, 11.10.3390/atmos11050486 ↗
50. Eurostat (2024, December 10). Incineration. Available online: https://ec.europa.eu/eurostat/statistics-explained/index.php?title=Glossary:Incineration.
51. Cross-Laminated Timber Constructions in a Sustainable Future—Transition to Fossil Free and Carbon Capture Technologies10.1088/1755-1315/588/4/042060 ↗
52. Zhao, J., Wei, X., and Li, L. (2022). The Potential for Storing Carbon by Harvested Wood Products. Front. For. Glob. Change, 5.10.3389/ffgc.2022.1055410 ↗
53. Wood Waste Decomposition in Landfills: An Assessment of Current Knowledge and Implications for Emissions Reporting
54. Carbon Dynamics of Paper, Engineered Wood Products and Bamboo in Landfills: Evidence from Reactor Studies10.1186/s13021-018-0115-3 ↗
55. IPCC—Intergovernmental Panel on Climate Change (2021). Climate Change 2021: The Physical Science Basis, Cambridge University Press. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change.
56. Vis, M., Mantau, U., and Allen, B. (2016). CASCADES Study on the Optimised Cascading Use of Wood, Publications Office of the European Union.
57. The Cascade Chain: A Theory and Tool for Achieving Resource Sustainability with Applications for Product Design10.1016/0921-3449(94)90016-7 ↗
58. Exploring Attitudes towards Extending Lifecycle of Wood Products by Cascading: A Case Study in Bosnia and Herzegovina, Croatia, Serbia, and Slovenia10.1080/17480272.2023.2294345 ↗
59. Bragança, L., Cvetkovska, M., Askar, R., and Ungureanu, V. (2023). Design for Disassembly and Reuse of Timber in Construction: Identification of Trends and Knowledge Gaps. Creating a Roadmap Towards Circularity in the Built Environment, Springer. Springer Tracts in Civil, Engineering.10.1007/978-3-031-45980-1 ↗
60. Jockwer, R., Öberg, V., Ottenhaus, L.-M., Leardini, P., and Goto, Y. (2023, January 19–22). Towards adaptability and circularity of timber buildings. Proceedings of the 13th World Conference on Timber Engineering (WCTE 2023), Oslo, Norway.10.52202/069179-0203 ↗
61. OECD—Organization for Economic Co-Operation and Development (2019). Global Material Resources Outlook to 2060: Economic Drivers and Environmental Consequences, OECD Publishing.
62. Environmental and Socio-Economic Effects of Construction and Demolition Waste Recycling in the European Union10.1016/j.scitotenv.2023.168295 ↗
63. No Zero Burden Assumption in a Circular Economy10.1016/j.jclepro.2018.02.031 ↗
64. Comparison of Environmental Impacts of Structurally Equivalent Wood-Based Floors10.1007/s00107-021-01742-x ↗
65. Rasmussen, F.N., Ernst Andersen, C., Wittchen, A., Nøddegaard Hansen, R., and Birgisdóttir, H. (2021). Environmental Product Declarations of Structural Wood: A Review of Impacts and Potential Pitfalls for Practice. Buildings, 11.10.3390/buildings11080362 ↗
66. Exploring the Synergy between Structural Engineering Design Solutions and Life Cycle Carbon Footprint of Cross-Laminated Timber in Multi-Storey Buildings10.1080/17480272.2021.1974937 ↗
67. Comparison of Generic and Product-Specific Life Cycle Assessment Databases: Application to Construction Materials Used in Building LCA Studies10.1007/s11367-015-0938-z ↗
68. Næss, J.K., Bouzada, A.M.S., and Modaresi, R. (2023, January 19–22). GHGs Emissions from Sawnwood Products in Norway—The Importance of Harmonised LCA Methodology in Environmental Product Declarations (EPDs). Proceedings of the 13th World Conference on Timber Engineering (WCTE 2023), Oslo, Norway.10.52202/069179-0133 ↗
69. Linkosalmi, L., Schwarzschachner, H., and Valtonen, T. (2023, January 19–22). Harmonisation of The Environmental Product Declarations for Wood Products. Proceedings of the 13th World Conference on Timber Engineering (WCTE 2023), Oslo, Norway.10.52202/069179-0594 ↗
70. Comparison of Type III Environmental Product Declarations for Construction Products: Material Sourcing and Harmonization Evaluation10.1016/j.jclepro.2017.04.133 ↗