Building sustainability assessment with LCA and LCC for residential housing projects - case studies

A significant number of existing buildings were built not complying with sustainability measurements. As a result, the internal environment is not healthy nor comfortable—a tremendous amount of energy is required in the construction and operation stages. Residential buildings, historical and modern, were used in the case study to improve their thermal performance using EPS and PIR insulation system, the maintenance plan methodology regarding both buildings explained in detail. The insulation thickness and the cost per mq were determined using the life cycle costing analysis—the environmental impact of the material evaluated through the life cycle assessment approach. The detailed investigation, post-investigation maintenance actions, and proactive maintenance plan are followed to design a proper maintenance plan for both buildings used in the case study. However, the differences in the pre-treatment procedures to install the insulation are included in the maintenance plan. The Life cycle costing method estimate the cost and the thickness of the insulation material, PIR insulation panel thickness 0.031 m cost 7.93 €/m2, while 8.99 €/m2 is the cost of the EPS panel thickness 0.037 m. based on the obtained thickness the environmental analysis reported that; , 1217.97 MJ and 1109.11 MJ of energy consumed by EPS and PIR insulation panel in the production stage .meanwhile, the CO2 emission about 131.25 kg from the PIR, which more the PES emission by three times.