Analysis of CO2 emissions in the construction phase of single-family detached houses

• CO2 emissions in the construction phase of a single-family detached house are evaluated.
• The case study is designed according to most common materials and techniques.
• The CO2 emissions are evaluated and divided into construction stages.
• Life cycle assessment tool is used to evaluate the environmental impact.

Within the European Union (EU), the implementation of strategies for smart, sustainable, and inclusive economic growth is a major priority. Sustainable growth is summarized in the following objectives for 2020: (i) 20% reduction in EU greenhouse gas emissions from 1990 levels; (ii) 20% energy consumption from renewable resources; (iii) 20% reduction in EU energy consumption by improving energy efficiency in member states. Within this context, this research analyzes the environmental impact of CO2 emissions in building construction in the following Life Cycle Assessment (LCA) processes: (A1) raw material supply; (A2) transport; (A3) manufacturing; (A4) transport; (A5) construction/installation on-site processes. In the case of a single-family detached house, the value obtained was 385 kg CO2/m2 of the surface area of this building type. The distribution of these emissions among the construction work units was also obtained.