Does Prefabricated Assembly House Leak Water?

Prefabricated assembly houses may leak water if not constructed properly, but their waterproofing performance is comparable to that of traditional buildings when constructed according to standards.

From the perspective of the causes of water leakage risks, the water leakage problems in prefabricated assembly houses mainly stem from defects in the construction process. If the assembly and splicing are improper or the joint treatment is poor during construction, water leakage is highly likely to occur. For example, if the sealant at the splicing joints exhibits phenomena such as rubber whitening and shrinkage or poor adhesion, rainwater will penetrate along the gaps; if the components rely solely on sealant for joint filling without the provision of tongue-and-groove joint structures, once the sealant ages or deforms under stress, the gaps will be exposed, leading to rainwater leakage. In addition, inaccurate control of joint gaps also increases the risk of water leakage. When the gaps are too large, it is difficult for the sealing materials to completely fill them, creating leakage channels.

To reduce the risk of water leakage, modern prefabricated buildings have adopted a series of waterproofing measures. In terms of structural design, reserving waterproofing structures is crucial. For example, the installation of water stops ensures that when components are spliced, the water stops deform under pressure, filling the gaps and preventing rainwater penetration; the design of sealing grooves allows for the accommodation of more sealant, enhancing the sealing effect. In terms of material selection, high-elasticity sealant is used to fill the joints. This type of sealant has good weather resistance and elasticity, enabling it to adapt to the slight deformations of the components and maintain a sealed state. Some projects also adopt double-layer waterproofing treatment, further improving waterproofing reliability. The high-precision control of joint gaps in factory-prefabricated components reduces errors during on-site construction, providing a good foundation for waterproofing treatment.

As long as the construction process strictly adheres to the standards, the waterproofing performance of prefabricated assembly houses is no worse than that of traditional cast-in-place buildings. Traditional cast-in-place buildings may also encounter waterproofing problems such as concrete cracks during construction, while prefabricated assembly houses have certain advantages in quality control through factory production and standardized construction. As long as construction personnel operate strictly in accordance with design requirements and construction standards, and properly handle the joints and construct the waterproofing structures, water leakage problems can be effectively avoided, ensuring the functionality and durability of the houses.