Quality of Prefabricated Panel Buildings

The overall quality of prefabricated panel buildings is poor, with multiple defects, requiring careful evaluation of their safety and suitability.

Extremely Weak Earthquake Resistance and Low Structural Safety

Prefabricated panel buildings have almost zero earthquake resistance and poor integrity. Their structure is composed of prefabricated concrete panels joined together, relying only on a small amount of steel reinforcement or cement mortar at the connection points, resulting in insufficient strength. Under seismic action, the connection points are prone to fracture, leading to sudden collapse of the building, making it a fragile structure that “falls apart at the slightest touch.” This defect poses significant safety hazards in earthquake-prone areas or regions with high seismic fortification requirements.

Substandard Materials and High Brittleness Risk

During the production of prefabricated panels, there is often a problem of cutting corners, resulting in insufficient concrete strength and low steel reinforcement ratios. The materials are highly brittle and prone to cracking or even fracturing due to temperature changes, foundation settlement, or external impacts. Such damage is often well-hidden and difficult to detect through surface observation, potentially leading to structural failure over long-term use.

Poor Sound Insulation and Thermal Insulation Performance

The walls and floors of prefabricated panel buildings are mostly single-layer structures, lacking sound insulation layers or thermal insulation materials, resulting in severe indoor noise interference and extreme temperatures in winter and summer. For example, insufficient floor thickness exacerbates noise transmission between floors, while high thermal conductivity of wall materials increases energy consumption for air conditioning or heating, affecting living comfort.

Difficulty in Internal Structure Adjustment

The design of prefabricated panel buildings is primarily based on standardized modules, with fixed positions for load-bearing walls and floors, making it difficult to adjust the interior layout through demolition or renovation. Forcing structural changes (such as breaking through walls) may compromise overall stability and pose safety hazards, limiting the functional flexibility of the building.

High Risk of Water Seepage and Insufficient Durability

The joints between prefabricated panels are prone to gaps due to construction defects or material aging, leading to rainwater leakage. Long-term water seepage can corrode steel reinforcement and damage the concrete structure, further reducing the building's lifespan. Additionally, the design lifespan of prefabricated panel buildings is typically 30 to 50 years, much shorter than the over 70 years for cast-in-place concrete structures, necessitating early planning for reinforcement or reconstruction.

Summary: Due to structural, material, and design limitations, prefabricated panel buildings have defects such as poor earthquake resistance, brittle materials, weak sound and thermal insulation, difficulty in renovation, and high water seepage risk, resulting in low overall quality. If used for residence, it is essential to focus on checking structural safety and conduct regular maintenance; if used for investment or long-term use, careful evaluation of their suitability is required.