Abstract: “The building sector is known to be dominant consumer of energy resources, contributor to greenhouse gas emissions and other environmental impacts. Over the last decade, the development towards sustainability hasbecome important issue in building design decisions. Life cycle assessment (LCA) belongs to broadly used methodology which helps to make decisions in sustainable building design. In this paper, environmental building material performance of wall assemblies for exterior wall is evaluated through LCA (construction phase). The relative contribution of embodied impacts of building materials has been recognized as being significant, especially for high energy effective residential buildings. The exterior walls of houses were by far the most significant contribution of embodied impacts associated with the construction phase. The case study assesses environmental indicators such as embodied energy from non-renewable resources, embodied emissions of CO2-eq. and SO2-eq. (within boundary”

Keywords: building materials, wall assemblies, life cycle assessment, environemntal and energy assessment