English：

Leakage is a common quality issue in building curtain walls,which affects the performance ofbuilding structures to a certain extent, and is usually difficult to effectively eradicate. Based on nearlyforty ongoing or completed curtain wall projects, this paper comprehensively analyzes the causes of curtainwall leakage, introduces common detection technologies for curtain wall leakage, and describes thepractical application of infrared thermal imaging. The main causes of curtain wall leakage include missingor cracked sealant application, issues or failure of gasket installation, excessive window joint gaps, andproblems with the corner connections of operable windows. It is necessary to fully consider theeffectiveness of the anti⁃leakage function in the design scheme, choose materials suitable for theconstruction environment, strengthen quality control during material processing and construction stages,and regularly carry out detection and maintenance work to promptly address leakage areas.