The built environment is currently responsible for nearly 40 percent of global energy- and process-related CO2 emissions. Each building element affects a building's environmental performance through its passive contribution to both operational energy demand and embodied energy and emissions during each life cycle phase. This has led to encourage all stakeholders in the AEC industry value chain to transparently understand where and when carbon emissions are generated and can be minimised. More informed decisions can be made through tools such as life cycle assessment. LCA analyses the environmental impact during the entire life cycle of a product/service/process. Using LCA, the embodied energy of a building (energy consumed during production, construction and replacement of building components) can be calculated in terms of kgCO2eq.