Developing and Applying a Model for Evaluating Risks Affecting Greening Existing Buildings

Improving building performance through reducing negative environmental impacts can be achieved by greening existing buildings (GEB), which is considered a very important sustainability process. Due to the risky and uncertain nature of process GEB, growing amount attention should given eliminating effects risks on GEB. This research aims identify most expected risk factors related as well evaluate their calculating factor characteristics, such presence (RFP), impact GEB (IGEB), in long run (IBP), new indices describe these risks. Sixty-six were categorized seven groups economic aspect, social managerial operation, sustainable design, renovation. Moreover, fuzzy model for analysis was developed combine multi-effects aforementioned three characteristics one index representing factors’ overall importance. The applied verified data collected Saudi Arabia. results this study showed that group control, while least renovation construction. Using proposed improved evaluating affecting merging characteristics. proved key nature. An intricate relationship with importance clearly found. decision makers who deal projects Arabia aware identified study. methodology easily other countries help projects, comparing more based analysis.