Prefabricated Panel House Wall

The prefabricated panel house wall is a type of building that uses prefabricated concrete panels as its walls. It features fast construction speed and low cost, but also has defects such as leakage and poor seismic performance, which can be addressed through specific technologies.

Basic Meaning and Construction Characteristics

The prefabricated panel house wall, also known as prefabricated panel housing or large-panel housing wall, belongs to the category of prefabricated assembled housing. It achieves rapid installation through factory-prefabricated components, with a construction speed far exceeding traditional building methods and lower construction costs. All components of the wall panels are produced in a standardized manner in factories, and some parts and materials can be recycled. The house has the characteristic of being completely disassemblable, making it easy to transport and further saving costs.

Common Issues

The prefabricated panel house wall has some obvious defects. Leakage is a prominent issue, mainly caused by construction defects such as cracking at the joints of the wall panels and shrinkage of the sealing materials. Poor seismic performance is also a major problem, posing a significant threat to the safety of the house during natural disasters such as earthquakes. Additionally, the sound insulation and thermal insulation effects are not ideal, affecting the comfort of living. The service life of prefabricated panels generally ranges from 30 to 50 years, with the actual lifespan influenced by factors such as material quality, construction quality, usage environment, and maintenance conditions. Many old public housing units built in the 1980s and 1990s commonly have issues such as cracking of the prefabricated floor panels and insufficient strength of the wall mortar. These problems not only affect the appearance of the house but also pose potential threats to its structural safety.

Key Renovation Technologies

Specific renovation technologies can be employed to address the issues with prefabricated panel house walls. For the treatment of joints in prefabricated wall panels, exterior wall flexible waterproof putty can be used as the joint filling material, polyurethane elastic waterproof coating as the sealing layer, and fiber mesh cloth instead of steel wire mesh as the reinforcement layer to effectively solve the leakage problem. For example, Jiangcheng Decoration has independently developed a triple-composite system of 'elastic base layer + anti-crack mesh + high-toughness surface layer' to address the most troublesome issue of cracking in prefabricated floor panels during the renovation of old houses in Yangpu. Field tests have shown that this system reduces the wall repair rate by 79%, significantly improving the quality and durability of the house.