St. Gerivatiba, 207 – Butantã, São Paulo – State of São Paulo, Brazil
eTool prepared the Building Life Cycle Assessment of the River One Corporate project, high-rise building whose main objective was to quantify the reduction of environmental impacts to meet the requirements of the LEED Gold certification for the LCA of the whole building.
Life Cycle Analysis of Buildings (LCA) is a method for evaluating the environmental impacts associated with the life cycle phases of a project. It is a holistic approach that encompasses raw material extraction, material manufacturing and transportation, energy and water use, maintenance, reuse, recycling, and end-of-life disposal of materials. The LCA study allows identifying potential areas for reducing the environmental impact and may also include improvement recommendations for the project team. Building LCA is regulated by the international standards ISO 14044 and EN15978 and the application in the construction sector is used worldwide to promote sustainable development offering the main benefits:
- Ensuring that lifetime impacts are considered from the design phase and provide information for project development;
- Ensure that the analysis includes the entire building throughout its useful life (cradle-to-cradle);
- Optimize performance during all stages of the project’s life, provided that improving a specific area does not detract from the performance of the project as a whole.
- Consider multiple impact indicators and prevent the transfer of impact from one project area to another;
- Ensure that the analysis is done following the international standards compliance of the LCA methodology so that the studies are comparable and accessible for interpretation.
LCA Scope for LEED
The LEED credit for Building LCA is focused on products and materials and does not consider the impacts and benefits associated with the operational phase (B6 energy and B7 water) or the loads and benefits beyond the system boundary (module D). eTool recommends the LCA for future projects be carried out also to fully meet the requirements of the European standard EN15978 including all life cycle modules (A1-A5, B1-B7, C1-C4 and D1-D5) to understanding the whole building performance.
LCA Software and Inventory
The software used for the study is the eToolLCD from the company eTool. eToolLCD complies with ISO 14044 and EN 15978 and produces results for the required impact indicators. The software database (inventory) used was the North American V13 Life Cycle Strategies/EcoInvent which complies with the ISO14044 standard. The characterization method of impact indicators is CML IA Baseline V4.5 (Institute of Environmental Science).
The Reference project (Baseline) and the Final project have the same function area in square meters (m²), area and orientation. The results are characterized by square meter for a period of 60 years, considering a total area of 58,331 m².
The LCA considers a useful life of 60 years and allows impacts related to maintenance, replacement and operational use to be adequately considered.
Main objectives of LCA
- Quantify the main improvement strategies implemented in the project and identify the contribution of each one in increasing the environmental performance of the project as a whole
- Create baseline data for LCA of buildings in Brazil
- Create a case study to promote the use of the methodology in Brazil and LEED certification
- To present for the construction sector that LCA is a viable practice and widely used internationally to promote sustainable development
- Client: CTE, SDI Desenvolvimento Imobiliário and RBR Asset Management
- Location: St. Gerivatiba, 207 Butantã – São Paulo SP – Brazil
- Date: October 2019
This LCA study has been developed by Caio Alencar and certified by Henrique Mendonça from eTool.