Leakage in Prefabricated Slab Structure Houses

The repair method for leakage in prefabricated slab structure houses should be selected based on the specific situation. Common causes include ineffective sealing of slab joints, aging of the waterproof layer, and structural settlement, among others. Repair methods include color steel roofs, waterproof membranes, and plastic film coverage, etc..

For leakage in prefabricated slab roofs, surface treatment alone is not sufficient because the interior of the prefabricated slabs may be hollow, making it difficult to completely solve the problem through surface treatment.

Color Steel Roof: Made of metal sheets with anti-rust coatings, the entire roof is assembled by pressing and joining the sheets together, which basically prevents rain leakage. There are two installation methods: pointed roof and flat-laid installation. Both have the same rainproof coefficient, but the pointed roof costs about 20% more than the flat roof. The service life is 20 years, with a basic price ranging from 60 to 80 yuan per square meter. This method is suitable for users with high roof waterproof requirements and relatively sufficient budgets. After installation, it can effectively solve leakage problems for a long time and requires relatively simple maintenance.

Waterproof Membrane: It is a commonly used roof waterproofing material, and its waterproofing effect depends on the quality of the waterproof membrane and the technical proficiency of the construction personnel. The price of the waterproof membrane alone is around a dozen yuan per square meter, and including construction costs, it is not cheap. The service life of the membrane is generally about 15 years. Choosing a reliable waterproof membrane and having it installed by professional personnel can ensure that the roof remains leak-free for a long time, but the construction process is relatively complex and requires high technical skills.

Plastic Film Coverage over the Entire Roof: After covering the roof with plastic film and securing it, or covering it with a layer of soil (or other covering material), the rain leakage problem can be perfectly solved. However, its service life is relatively short, generally 2-3 years. The advantage is that it is cheap, generally around 2 yuan per square meter. This method is suitable for users with limited budgets and low requirements for service life, and can be used as a temporary or transitional waterproofing measure.

In addition, in Chibi City, Hubei Province, some residents have reported issues of ceiling cracks and leakage, as well as rusty and leaking sewers, in the prefabricated slab houses of unregulated communities. After investigation, it was found that the ceiling leakage in the prefabricated slab houses was caused by long-term disrepair of the houses themselves, and the sewer leakage was caused by damaged plumbing in the bathrooms of the houses. These two issues do not fall within the scope of municipal public areas and are not suitable for inclusion in government-funded construction projects. They should be repaired by the house owners themselves.