Causes of water seepage of U-shaped glass curtain wall

1. Material reasons

The joints of U-shaped glass curtain wall are the main places where the gaps occur. From the analysis of the actual projects in our country and the structural joints of various joints of many U-shaped glass curtain walls, in addition to the opening fan in the U-shaped glass curtain wall, the other joints of the first waterproofing line are the use of building sealants to achieve sealing treatment. Water can seep in if the sealant breaks or tiny gaps occur that are invisible to the naked eye.

Failure to select suitable weather-resistant silicone gel according to the standard, or failure to meet the technical specifications of weather-resistant silicone gel, or use structural adhesive instead of weather-resistant adhesive, therefore, it is a main reason that water seepage is caused by bubbling and cracking of glue joint.

2. Design reasons

Because all the external forces on the glass U-shaped glass curtain wall are finally carried by the aluminum profiles, if the column or beam is not strong enough, it will lead to the deformation of the U-shaped glass curtain wall beyond the prediction, as a result of the unexpected deformation of sealant, or because the gap is too large sealant can not play a normal sealing role. Such as in the opening of the fan is not closed tight and so on are the cause of water seepage. In addition, improper structural design is also the main cause of U-shaped glass curtain wall gap, for example, open window waterproof seal treatment failure or lack of seal layer number, general standard 2-3 Seal 1, when the rainwater flows along the U-shaped glass curtain wall, it enters into the open window directly, resulting in flooding.

3. Interface reasons

Some aluminum profiles surface does not meet the national standards, surface coating adhesion is weak or oxide film is too thin, too thick, it may lead to failure of sealant bonding and cracking.

4. Construction reasons

The installation of glass U-shaped glass curtain wall is a process with high accuracy standard. When aluminum frame is installed and the sealant is extruded, improper operation, improper treatment of the contact interface and unreasonable thickness and width of the sealant will cause hidden trouble for leakage. In particular, where the U-shaped glass curtain wall connects with the building, often because the construction unit of the U-shaped glass curtain wall did not study and cooperate with the civil construction unit, and constructed separately, each side of the tube, finally, due to improper construction measures or construction rough caused by seepage channel. Such as the top of the U-shaped glass curtain wall and the connection between the parapet, often due to improper co-ordination caused by not tight or missing, these will form a seepage channel.