Interior Wall Cracking in Prefabricated Panel Houses

The handling of interior wall cracking in prefabricated panel houses should be classified according to the nature of the cracks, the warranty period, and the attribution of responsibility, as detailed below:

I. Structural Characteristics and Risks of the House

Prefabricated panel houses adopt a floor structure that is prefabricated in factories and assembled on-site. Their overall firmness and toughness are relatively poor, and their seismic performance is insufficient. As the service life increases, problems such as wall water seepage and steel bar corrosion may accelerate structural aging, leading to an increase in cracks. If the cracks are accompanied by floor subsidence, wall tilting, or obvious abnormal noises, it may involve damage to the main structure. In such cases, it is necessary to immediately entrust a professional institution to conduct a house safety appraisal to confirm whether it constitutes a dangerous house.

II. Attribution of Responsibility and Maintenance Obligations

1. During the Warranty Period
   According to the Regulations on the Administration of Construction Project Quality, the warranty period for foundation and main structure projects is the reasonable service life specified in the design documents (usually ≥ 40 years). If wall cracks are a main structure problem, the construction unit shall fulfill long-term warranty obligations and compensate for losses. The warranty period for other parts (such as the decoration layer) is generally 2 - 5 years, subject to the purchase contract.

2. After the Warranty Period

   • Exclusive Parts: Homeowners need to bear the responsibility for indoor wall maintenance themselves. They can entrust a professional institution to repair the cracks or reinforce the structure.
   • Common Parts: If the cracks involve common areas such as exterior walls and roofs, homeowners can apply for the use of building maintenance funds. After a joint decision by the homeowners' assembly, the property management company or a professional unit can carry out the maintenance.

III. Dispute Resolution Approaches

If homeowners and the responsible parties (such as developers and property management companies) have disputes over the causes of the cracks or maintenance responsibilities, they can resolve them through the following methods:

1. Negotiation and Mediation: The two parties can communicate directly or have the community or housing and construction department intervene in the mediation.
2. Legal Channels: If negotiation fails, they can apply for arbitration or file a lawsuit with the court according to law. The party at fault shall bear tort liability (such as compensating for losses and restoring the original state).

IV. Practical Case Reference

In the 1980s prefabricated panel houses in Shuangtasi Community, Taiyuan City, wall cracking led to the relocation of homeowners. The community took three measures:

1. Urged the property management company to strengthen inspections and post warning signs.
2. Advised homeowners to apply for house safety appraisals.
3. Promoted the application process for maintenance funds. Such cases indicate that old prefabricated panel houses need regular structural safety inspections and timely handling of crack problems.