Life cycle performance of modular buildings: A critical review

Off-site construction has gained more attention from both academia and industry during the last few years. Modular construction is one of the most efficient off-site construction methods. In this method, different parts (components) of a building are designed and fabricated off the construction site in factories as one or more modules, and then they are assembled on site to form the final product. Studies have shown that the modular building technique is applicable to different types of buildings, including residential, commercial, educational, and medical. Environmental performance is one of the most significant dimensions leading to sustainability. Since buildings account for a substantial portion of environmental burdens, the main focus of this study is on the environmental performance of modular facilities over their life cycle. This article also presents a comprehensive critical literature review on the benefits and challenges of the modular construction method, compared to its conventional counterpart. It is concluded that, on average, modular buildings have been shown to provide a better life cycle performance, for example a building׳s energy performance, among others. Further life cycle research, considering all the dimensions of sustainable construction, is recommended in order to develop a robust picture of the sustainability of modular construction.