For the construction engineering, the roof waterproof engineering is a very important content. The roof leakage is one of the most prominent problems in the use of the building. The quality of the roof waterproof construction is related to the service life of the building. According to statistics, the main causes of roof leakage are: 20% - 22% of materials, 18% - 26% of design, 45% - 48% of construction, and 6% - 15% of management and maintenance. Whether the roof waterproof technology is standardized has an important impact on the whole building. This paper analyzes the current situation of the materials, design, construction, management and maintenance of the building roof, and summarizes the waterproof technology of the building roof by referring to the relevant materials, literature and construction site practice experience. At the same time, some constructive countermeasures and suggestions are put forward for the design and construction of roof waterproof engineering. Therefore, to ensure the quality of waterproof engineering, design is the premise, construction is the key, and appropriate waterproof materials should be selected. Scientific research on waterproof technology of construction engineering is of great significance to improve the quality of the whole construction engineering.<br>
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