Abstract
Green roofs (GRs) offer several environmental, social, and economic benefits while numerous barriers are limiting their adoption. This study covers two gaps in the literature: first, the lack of indicating separate hindrances to different types of GRs; second, the dearth of research related to the hindrances on GR adoption in any climate of Iran. This research aims to identify and analyze the importance of hindrances to GR adoption by considering the two major types of GRs using the Fuzzy Delphi Method (FDM) and Fuzzy Analytic Network Process (FANP), respectively. The results indicated that eight out of twenty-five identified hindrances to GR adoption were rejected using FDM. Moreover, it was found that although financial hindrances are significant for both types of GRs, public awareness is the most important hindrance to extensive GR adoption. As the first research of its kind in a semi-arid climate of Iran, the findings of this research provide an insight for the researchers and policymakers regarding the hindrances to GR adoption for further research and action.
Highlights
The construction industry is responsible for several adverse impacts on the environment such as CO2 and greenhouse gas emissions, and sustainable approaches in the construction industry are being adopted as a practice to deal with these issues [1]
In the study conducted by Chen et al [24], design and construction costs are determined as an important root cause hindering the adoption of Green roofs (GRs), while the findings of current research provide a clearer insight into the costs of GRs as a hindrance to GR adoption considering the local context
Considering the different levels of costs and benefits offered by each type of GR, there is a myriad of hindrances to their adoption
Summary
The construction industry is responsible for several adverse impacts on the environment such as CO2 and greenhouse gas emissions, and sustainable approaches in the construction industry are being adopted as a practice to deal with these issues [1]. IGR, colloquially known as roof garden, accommodates a wide range of plants and trees It is the most expensive type of GR and requires a considerable amount of maintenance, it is a suitable option for public use, especially in places where there is limited land for creating recreational space for the public. It is notable to mention that EGR has a low depth of soil, it is limited in terms of type and quantity of plantations In addition to these two major types, semi-IGR has been considered as the third type of GR in some studies [9], which has characteristics from both major types.
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