Abstract
By assessed different material compositions of building envelope which comply U-value of energy standard and nearly zero energy residential buildings it is possible to compare the impact of increasing insulation materials in structure compositions on embodied energy. The selection of building materials for building structures which has a significant share of total environmental performance of building and the potential of improvement is analyzed in this paper. By evaluating of large quantity of different material compositions of conventional and alternative environmental suitable structures of building envelope were determined criteria for environmental indicators such as embodied energy, CO2eq emissions and SO2eq emissions. The criteria for the evaluation of mentioned environmental indicators are determined on the base of alternative material compositions of structures which are assessed in order to identifying the most optimal solutions in terms of environmental sustainability by LCA within system boundary “cradle to gate”. The aim of this paper is to introduce the Slovak building environmental assessment system (BEAS) and to determine the criteria for environmental indicators such as embodied energy, CO2eq emissions and SO2eq emissions for the purpose of their implementation to BEAS. Worldwide used building environmental assessment systems and tools were the base of new system development for Slovak conditions. The fields and indicators were proposed on the bases of available information analysis from particular fields of building environmental assessment and also on the base of our experimental experiences.
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