Prefabricated House Roof Leakage

Targeted measures should be taken to address roof leakage in prefabricated houses based on the specific causes and the nature of the house, rather than just performing surface repairs.

Analysis of Leakage Causes

1. Failure of Panel Joint Sealing: If the sealing materials in the panel joints of prefabricated panel-structured houses age, fall off, or are not sealed tightly during construction, rainwater can seep into the interior through the panel joints, causing roof leakage.
2. Aging of the Waterproof Layer: The waterproof layer on the roof of prefabricated panels is exposed to the natural environment for a long time. Affected by factors such as ultraviolet rays and temperature changes, it will gradually age and crack, losing its waterproof function and thus causing leakage.
3. Structural Settlement: Uneven settlement of the house foundation can cause cracks in the prefabricated panels, damaging the waterproof system and resulting in leakage.
4. Improper Laying of Waterproof Membranes: If the waterproof membranes on the roof of prefabricated panels are not tightly overlapped, firmly adhered, or if the base layer is not properly treated during laying, water seepage can occur, leading to leakage.
5. Improper Assembly and Jointing during Construction: In rural prefabricated concrete houses, improper jointing and incomplete treatment of connection parts during the assembly and construction process can also cause quality issues such as leakage.

Treatment Measures

1. Rural Prefabricated Concrete Houses: If leakage is caused by improper assembly and jointing during construction, the construction company can be required to carry out repairs in accordance with the contract. The construction company should reprocess the jointing parts in accordance with relevant standards and specifications to ensure tight connections and reliable waterproofing.
2. Old Prefabricated Panel-Structured Houses: For old prefabricated panel-structured houses in "three-no" communities, roof leakage caused by the house's own long-term disrepair does not fall under the category of municipal public area issues and should be repaired by the house owner themselves. During repair, it is necessary to first identify the leakage points, clean the panel joints, and refill them with sealing materials; remove the aged waterproof layer and relay waterproof membranes or apply waterproof coatings; if there are structural cracks, reinforcement treatment is required.