Improper construction of embedded channels poses a risk of leakage, with the phenomenon and hazards including dampness and water leakage at the inner side of the exterior wall at the root of the embedded channels, which can damage the decorative layer inside the wall and affect aesthetics. Causes of leakage include: the installation of embedded channels being loose or not secure, drilling holes for embedded components after the exterior wall decoration, or being impacted, leading to poor bonding of new and old mortar during plastering, and the formation of hollows and cracks. Some installations do not fill the holes for embedded components, causing leakage. Preventive measures for leakage: The installation of embedded components (such as drainpipe clips, air conditioner brackets, etc.) must be done before the wall decoration. Strict control of specifications, quantity, position, elevation, and spacing is required during installation, ensuring the components are securely mounted without any looseness or displacement. Prior to installation, iron embedded components must be carefully rusted and anti-corrosion treated to ensure a firm bond with the decorative layer. During plastering, the root of the embedded components must be meticulously handled, ensuring dense compaction. It is strictly prohibited to rush the work, and avoid random impacts and vibrations to prevent the loosening of embedded components due to external forces, which could lead to cracks in the decorative plaster layer.