Purpose: The construction industry plays an important role in the achievement of the 11th and 15th of the Sustainable Development Goals. Efforts have been made by most developing and developed economies toward the achievement of these goals. Despite the efforts being made by the construction industry toward the achievement of these goals, there are still barriers that prevent built environment consultants from advancing environmental sustainability (ES) of construction projects. The purpose of this paper is to identify barriers to ES of construction projects. Design/methodology/approach: An extensive literature review on barriers to the adoption of ES was conducted and face-to-face semi-structured interviews of purposively selected built environment consultants in Ghana were carried out. Thematic template analysis of qualitative data was conducted. Findings: The key findings from the study include perceived initial costs, lack of knowledge on ES, technological difficulties, external pressures in adopting ES practices and environmental conditions in developing countries. Originality/value: The outputs of this study offer strategies which are very significant to the construction industry in embracing ES. Further, the findings contribute to knowledge on achieving the sustainable development agenda.

Purpose: This study aimed to identify barriers impeding circular economy (CE) uptake in the construction industry in literature, categorize them for the development of a framework and to seek the interrelationships among the categorized barriers. This allowed for identifying integrated solutions to holistically address the barriers. The study also sought to identify the “hot” themes, the knowledge gaps and future research directions on barriers impeding CE.Design/methodology/approach: Forty-eight relevant articles were desk reviewed from different construction peer-reviewed journals and published conference papers. A scientometric analysis allowed for co-occurrence of keywords relating to CE. A content analysis enabled the identification of 79 barriers impeding the uptake of CE in the construction industry which were further categorized into six distinct categories for the development of a framework showing the interrelationships among the categorized barriers.Findings: The identified barriers include construction sector inertia, lack of design standards, lack of knowledge, awareness and understanding, design cost, and perception of second-hand materials as substandard among others. The study categorized the identified barriers for better understanding into six different groups: cultural barriers, social barriers, environmental barriers, economic barriers, technical barriers and technological barriers. Strategies to address the barriers were also proposed. The interrelationships among the various barriers were also shown in a proposed framework to educate professionals on the interconnectivity of the barriers.Practical implications: Categorization of the various barriers impeding CE uptake contributes to the body of knowledge. Also, the interrelationships among the various categorized barriers in the framework will enable construction professionals make informed decisions regarding the successful integration of CE in the industry, better appreciate the barriers that impede CE uptake and apply strategies to holistically address the barriers. This will expand current knowledge outside the narrow scope of isolated barriers.Social implications: To the global construction industry, the review presents a list of barriers and their interrelationships that could provide implementation strategies for the uptake of CE in the industry.Originality/value: The geographical scope of this study is not limited, and therefore encourages wide applicability of the findings to the global construction industry.

This study presents an analysis of the impacts of climate change on thermal comfort and energy performance of residential buildings in Ghana, in sub-Saharan Africa, and explores mitigation as well as adaptation strategies to improve buildings’ performance under climate change conditions. The performances of the buildings are analyzed for both recent and projected future climates for the Greater Accra and Ashanti regions of Ghana, using the IDA-ICE dynamic simulation software, with climate data from the Meteonorm global climate database. The results suggest that climate change will significantly influence energy performance and indoor comfort conditions of buildings in Ghana. However, effective building design strategies could significantly improve buildings’ energy and indoor climate performances under both current and future climate conditions. The simulations show that the cooling energy demand of the analyzed building in the Greater Accra region is 113.9 kWh/m² for the recent climate, and this increases by 31% and 50% for the projected climates for 2030 and 2050, respectively. For the analyzed building in the Ashanti region, the cooling energy demand is 104.4 kWh/m² for the recent climate, and this increases by 6% and 15% for the 2030 and 2050 climates, respectively. Furthermore, indoor climate and comfort deteriorate under the climate change conditions, in contrast to the recent conditions.

Purpose: The aim of this study was to identify these enablers in literature and subsume them under broad categories for the development of a framework showing the interrelationships among the enablers. Design/methodology/approach: Fifty-four (54) relevant articles were desk reviewed from different construction peer-reviewed journals and published conference proceedings to identify 20 core enablers of incorporating indoor environmental quality (IEQ) into building designs. Findings: The identified enablers include improved occupants' health, well-being and satisfaction, environmental conservation, high return on investments and co-operative methods of design and construction management among others. To better understand the enablers identified, they were classified into seven main interconnected categories: economic enablers, environmental enablers, occupant and end-user enablers, process enablers, corporate image, culture and vision enablers, client-related enablers and external enablers. Research limitations/implications: The interconnectedness brought to the fore a subtler appreciation of the drivers of IEQ, which could help expand current knowledge outside the narrow scope of isolated drivers. The fact that the papers selected in this study are not limited geographically underscores the wide applicability of the findings to the global construction industry. Practical implications: Understanding that the enablers will enhance the adoption and design of quality indoor environments, help in building the capacity of consultants to adopt the design of quality IEs and reduce the impact of construction on the environment. Social implications: These identified enablers are not limited geographically and thus could promote the design of quality indoor environments globally, particularly in green building design. To the global construction community, this review presents a list of enablers that would expedite the adoption of principles of IEQ designs in buildings thus taking the global construction industry one more step towards sustainable built forms. Promoting the identified enablers would ultimately steer stakeholders to design and build better indoor environments. Originality/value: The fact that the papers selected in this study are not limited geographically underscores the wide applicability of the findings to the global construction industry.

Purpose: The phenomenon of wicked problems is inextricably associated with a design process, especially participatory design. The management of wicked problems in participatory design, however, remains largely unexplored. The purpose of this paper is to explore the use of the choosing by advantages (CBA) decision system to manage wicked problems in participatory design. Design/methodology/approach: Two case studies, involving the application of CBA to make typical participatory design decisions, are evaluated to establish how responsively the CBA decision system operates in the midst of wicked problems in participatory design. Findings: Findings point to the exploitability of some elements and attributes of the CBA process to manage wicked problems in participatory design, to some extent. The observed collaborative attributes of CBA is particularly helpful and play a key role in mitigating the adverse effects of wicked problems on collaboration in this regard. Practical implications: The recommendation of the paper is the incorporation of CBA in the development of stakeholder involvement frameworks for a design process. Originality/value: This paper contributes to knowledge on relying on elements and the attributes of a decision-making system, such as CBA, to manage stakeholder involvement in the design process, particularly focussing on wicked problems. The CBA decision system still remains emergent regarding its application and research in the AEC industry.

The significance of user involvement in design process towards generating value remains uncontested. It is however a challenge to identify the most appropriate strategy for engaging users to effectively participate in design process. This paper explores the suitability of the choosing by advantages (CBA) decision system for designers to engage users in design process. The paper specifically reports on a case application of CBA to make a typical design decision, such as the choice of a mode of operation of window openings, in the design of a three-storey lecture theatre at Takoradi Polytechnic in Takoradi, Ghana. A workshop, involving various stakeholders, including potential users of the project, was organized to apply CBA to choose among various modes of operation of window openings: louvres, sliding, awning, casement and pivoted. Findings, which were based on an active participation of a key member of the research team in the workshop, were further corroborated by direct observation and interview with some participants in the workshop. The findings point to CBA as a decision system capable of creating a collaborative forum for designers to engage users in design decisions.