What is the direct cause of leakage in the waterproofing project?

1. The waterproof design of building waterproofing works is very important and is the prerequisite for ensuring the quality of the works. However, there are the following problems in waterproof engineering design:
① Most of the roof node structure is outdated. Warping, deformation, and decay are often caused by wind, sun, and rain, causing damage to cold water nodes and leading to roof leakage. To
②. There is no design specification for waterproof engineering, and there is no specification for designers to follow. There is no clear definition of how various types of buildings with different functions should be designed for waterproofing, what waterproof materials should be used, and what specific technical requirements are there. Regulations.
③. During the design and construction of some buildings, the overall rigidity of the roof is not enough, and cracks occur when the deformation is large; some roof slopes are too small, the number of drainage pipes is insufficient, or the diameter is too small, and the drainage route is too long, causing water in the roof to cause seepage. leak.
④ Designers have little knowledge of modern waterproofing, and do not know much about the performance, scope of application, and use conditions of new building waterproofing materials. They cannot correctly choose waterproofing materials according to the specific conditions of the building. It is caused by improper selection of materials. Leakage or waste.

2. Factors in the quality of waterproof materials
The quality of waterproof materials is the basis for a good waterproofing project. At present, there are many varieties and specifications of waterproof materials in China, and the product quality is different. At present, the domestic waterproof material market is relatively chaotic. Many inferior waterproof materials flood the market. For example, if unqualified waterproof materials are used in waterproofing projects, Will seriously reduce the quality of waterproofing works.

3. Factors in the quality of waterproof construction
The investigation and analysis of house leakage accidents show that construction factors are the main reason for house leakage. If there are qualified waterproof materials and excellent house waterproof design, but the construction is not serious and the construction quality is poor, the house will still leak. Therefore, ensuring the quality of construction is the key to improving the waterproof quality of the house. The main factors causing poor construction quality are:
① Lack of professional waterproofing construction teams, and even using workers who do not understand waterproofing technology to carry out house waterproofing construction operations, the consequences will inevitably lead to the failure of the waterproofing project.
② The quality control and management of the waterproof construction process is not paid attention to, the leveling layer and the waterproof layer are sloppy, the construction is not carried out according to the design drawings and construction technical specifications, and the process and level acceptance are carried out, especially the joint parts are not treated carefully. There is a hidden danger of leakage.
③ When the coating film is applied for waterproofing, it often fails due to uneven coating film thickness or thin coating film. Another example is that in order to get the project, some construction units try to keep the cost down and use some waterproof coatings with low solid content.
④ Rigid roof is not compacted by vibration, poor maintenance, insufficient thickness, improper handling of various sand and gravel proportions in concrete; improper isolation layer under the waterproof layer, no isolation effect; improper location of the partition joints, sealing Careful and inadequate material embedding will cause leakage of the rigid waterproof layer.
⑤. Due to the rush to the construction period and the progress, the waterproof layer was eagerly laid before the leveling layer was dry, and effective measures such as the exhaust steam roof were not taken, resulting in the bulging, delamination, rot and leakage of the waterproof layer.

4. Factors in quality management and maintenance
After the project is completed and put into use, the management and maintenance of the housing project must be done well. If the management and maintenance are not good, even if the materials, design, and construction are all high-quality, it will also cause roof leakage due to poor management and maintenance. The reasons for leakage due to poor management and maintenance are as follows:
①. In recent years, after many projects have been put into use, TV antennas, light boxes, solar water heaters, advertising placards and other facilities have been added to the roof. Construction operations have been performed on the roof waterproof layer, and holes have been drilled to locally damage the waterproof layer. Make a waterproof layer in time.
②. Some households breed poultry and play on non-human waterproof membrane roofs or coated waterproof roofs; or pile up sundries on the roofs without any intervention and treatment for a long time, which accelerates the rot and damage of the waterproof layer.
③. There is no special person to conduct regular inspections on the roofing project, and some local defects are not dealt with in time, which will lead to the expansion of defects, the development of cracks, the destruction of nodes, and the roof leakage over time.
④. The roof is cleaned regularly by no one to dredge the gutter, eaves and drain. The water downpipe is blocked, and the roof has accumulated water for a long time, causing the waterproof layer to delaminate and rot. Some roofs are not cleaned for a long time, and plants grow, and the roots of the plants plunge into the waterproof layer, which damages the waterproof layer.

5. Countermeasures to improve the quality of waterproof engineering
①, construction quality
It is stipulated that the construction unit shall pass the joint review of the drawings before the construction of the waterproof project, master the detailed structure and related technical requirements in the construction drawings, and shall prepare the construction plan or technical measures of the waterproof project. Moreover, the qualifications of waterproofing construction teams and operators are also stipulated, requiring that “roofing waterproofing projects must be constructed by professional waterproofing teams or waterproofing workers. Non-waterproofing professional teams or non-waterproofing workers are strictly prohibited from conducting roofing waterproofing works. It also emphasizes that in the construction of waterproofing projects, inspections should be carried out according to the construction process and levels, and the next process and level operations can be carried out after being qualified. At the same time, the new specification also stipulates the quality acceptance standards and inspection methods of waterproofing projects to control the construction quality of roof waterproofing projects.
②, waterproof design
Therefore, material quality, construction technology, design level, management and maintenance are important factors that affect the quality of building waterproofing projects. To improve the quality of waterproofing projects, we should base on materials, take design as the premise, take construction as the key, strengthen management and maintenance, and conduct comprehensive management of waterproofing projects.