PSI - Issue 55

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2023) 000 – 000 Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ Structural Integrity Procedia 00 (2023) 000 – 000 Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 55 (2024) 88–95

© 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the ESICC 2023 Organizers © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the ESICC 2023 Organizers Abstract This study analyses the potential of a high-energy efficient flat roof, relating sustainability to its costs, and, in conjunction, develops its maintenance strategy. Considering the common energy deficiency of flat roofs, the Smart Roofs System (SRS) project developed a new solution to the market. It combines traditional and innovative thermal insulation and waterproofing layers, to achieve a roof that provides thermal comfort to building users. This paper presents an analysis focusing on the maintenance needs and on the environmental impacts - based on a Life Cycle Assessment (LCA) approach - of fifteen different combinations for this SRS. The sustainability assessment of the roof analysed combines cost data and environmental impacts, considering categories such as non renewable primary consumption (PE-NRe) and global warming potential (GWP), in a cradle-to-gate analysis. The strategy used for the maintenance plan is proactive, focused on defining inspections, cleanings, repairs, and substitution actions, with their periodicity based on the prognosis process. The aim of this plan is the possibility of improving product quality in the long term, reducing expenses, and maximizing its efficiency over the time. Given the information and analysis presented, it is possible to make a holistic evaluation of the solution and deliver important data to decision-making, where the decision-maker can choose the most suitable combination taking into account the prioritized factors, such as environmental impact, expenses, and maintenance efforts. © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the ESICC 2023 Organizers 2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the ESICC 2023 Organizers 2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the ESICC 2023 Organizers 1. Introduction Currently, traditional flat roofs are a more frequent choice than pitched roofs in Portugal, despite the lack of information correlating the economic and energy performance (Marrana, 2017). They play an essential role in ESICC 2023 – Energy efficiency, Structural Integrity in historical and modern buildings facing Climate change and Circularity Life Cycle Assessment and Maintenance Planning of an Innovative Flat Roof Solution Giovanna Bartels a , Inês Flores-Colen b , José Dinis Silvestre c , Luis Silva d a,b,c CERIS, Department of Civil Engineering, Architecture & Environment, Instituto Superior Técnico, University of Lisbon, Av. Rovisco Pais, 1, 1049-001 Lisbon, Portugal d Saint-Gobain Weber, 3800-055 Aveiro, Portugal Abstract This study analyses the potential of a high-energy efficient flat roof, relating sustainability to its costs, and, in conjunction, develops its maintenance strategy. Considering the common energy deficiency of flat roofs, the Smart Roofs System (SRS) project developed a new solution to the market. It combines traditional and innovative thermal insulation and waterproofing layers, to achieve a roof that provides thermal comfort to building users. This paper presents an analysis focusing on the maintenance needs and on the environmental impacts - based on a Life Cycle Assessment (LCA) approach - of fifteen different combinations for this SRS. The sustainability assessment of the roof analysed combines cost data and environmental impacts, considering categories such as non renewable primary consumption (PE-NRe) and global warming potential (GWP), in a cradle-to-gate analysis. The strategy used for the maintenance plan is proactive, focused on defining inspections, cleanings, repairs, and substitution actions, with their periodicity based on the prognosis process. The aim of this plan is the possibility of improving product quality in the long term, reducing expenses, and maximizing its efficiency over the time. Given the information and analysis presented, it is possible to make a holistic evaluation of the solution and deliver important data to decision-making, where the decision-maker can choose the most suitable combination taking into account the prioritized factors, such as environmental impact, expenses, and maintenance efforts. ESICC 2023 – Energy efficiency, Structural Integrity in historical and modern buildings facing Climate change and Circularity Life Cycle Assessment and Maintenance Planning of an Innovative Flat Roof Solution Giovanna Bartels a , Inês Flores-Colen b , José Dinis Silvestre c , Luis Silva d a,b,c CERIS, Department of Civil Engineering, Architecture & Environment, Instituto Superior Técnico, University of Lisbon, Av. Rovisco Pais, 1, 1049-001 Lisbon, Portugal d Saint-Gobain Weber, 3800-055 Aveiro, Portugal Keywords: Roofs; Sustainability; Life Cycle Assessment; Maintenance; Performance; Service Life Keywords: Roofs; Sustainability; Life Cycle Assessment; Maintenance; Performance; Service Life 1. Introduction Currently, traditional flat roofs are a more frequent choice than pitched roofs in Portugal, despite the lack of information correlating the economic and energy performance (Marrana, 2017). They play an essential role in

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the ESICC 2023 Organizers 10.1016/j.prostr.2024.02.012