Zhangjiagang Prefabricated Houses

Zhangjiagang has industries related to prefabricated houses and prefabricated panel-structured residential buildings from specific historical periods, currently mainly involving two major fields: the production of prefabricated components and the treatment of leakage in old residential buildings.

I. Prefabricated Component Production Enterprises

Zhangjiagang Yongmao Residential Industry Co., Ltd. is a representative local enterprise engaged in the production of prefabricated components. Its business covers steel bar processing, mold manufacturing, and the production of concrete prefabricated components. Its core products include building assembly-type components such as interior and exterior wall panels and composite floor slabs, with an annual production capacity of 120,000 to 150,000 cubic meters, primarily supplying Shanghai and its surrounding areas. These enterprises provide standardized components for prefabricated buildings through industrial production models, driving the construction industry towards efficiency and environmental protection. Their products meet the demands of modern construction industrialization but differ from the concept of 'prefabricated houses' commonly encountered by residents, serving more commercial or public building projects.

II. Current Situation of Prefabricated Panel-Structured Residential Buildings

In the old urban area of Zhangjiagang, there are a large number of prefabricated panel and brick-concrete structured residential buildings constructed from the late 1980s to the early 1990s. These buildings use prefabricated hollow floor slabs as horizontal load-bearing components, combined with brick walls to form a structural system, which was a typical solution for rapidly addressing housing demands at the time. However, due to technological limitations at that time, the design lifespan of their roof waterproofing layers is typically 10-15 years. As of the current time, most buildings have exceeded the effective lifespan of their waterproofing layers, leading to frequent roof leakage issues during the plum rain and typhoon seasons. According to statistics, among the housing leakage complaints received by the local 12345 government service hotline in 2026, such residential buildings account for a significant proportion, becoming a focal point of public concern.

III. Leakage Treatment Solutions

For roof leakage in prefabricated panel-structured residential buildings, professional service providers such as Chuangda Repair Technology propose comprehensive solutions for all scenarios. The core measures include:

1. Repairing Aged and Cracked Waterproofing Membranes: Focus on addressing cracks in waterproofing membranes caused by thermal expansion and contraction, using weather-resistant materials for local or overall repair;
2. Investigating Illegal Constructions: Some top-floor owners have illegally built extensions to expand their usable area, damaging the original waterproofing layer structure. These illegal structures need to be demolished, and the waterproofing layer restored;
3. Enhancing Drainage Design: Optimize the roof slope and drainage system to prevent water accumulation from accelerating material aging.

Such treatments need to be combined with the structural characteristics of the buildings to avoid repeated leakage caused by simple repairs. It is recommended that homeowners commission professional institutions for systematic inspection and repair.