Promoting building materials that have lower embodied carbon and energy in public procurements: Experience from Estonia

摘要

Purpose - The purpose of this paper is to propose a more carbon efficient alternative design using engineered timber components over reinforced concrete elements to a recently completed nonresidential building located in Tallinn, Estonia. Also to promote building materials that have proved to have lower embodied carbon and energy. Design/methodology/approach - The paper is based on data collected from the original project drawings, embodied carbon and embodied energy values of construction materials under comparison which are based on Inventory of Carbon & Energy database and on the research conducted in Finland that focussed on wooden building products. The engineered timber solution is designed in accordance with relevant regulations and laws including requirements for fire safety and sound insulation. Findings - Buildings embodied carbon and embodied energy can be reduced by using proposed engineered timber materials. Research limitations/implications - The outcome of current research is limited and applies only to the reference building and its proposed alternative, therefore it should be taken into consideration before any use. Still it provides clear information that using more carbon efficient materials can significantly reduce the carbon footprint of a building. Practical implications - The outcome can be used as a tool promoting materials with a lower embodied carbon and energy in public procurements. Originality/value - This study comparing buildings enclosure system alternatives as a whole by allowing to choose more environmentally friendly solution is the first in Estonia.