Prefabricated Panel House Construction Team
The construction teams for prefabricated panel houses may face issues such as roof leakage, floor slab cracks and water leakage, and quality hazards due to the pursuit of speed when using prefabricated panels. It is necessary to choose carefully and strengthen construction supervision.
I. Roof Leakage When Using Prefabricated Panels
Although prefabricated panels offer the advantage of convenient construction when used on roofs, their structural characteristics result in weaker waterproofing performance compared to cast-in-place concrete. Prefabricated panels are composed of multiple panels joined together, and gaps are inevitable at the joints. If professional waterproofing materials (such as waterproof mortar and sealant) are not used to seal the joints during construction, or if the sealing layer ages and becomes damaged, rainwater can easily penetrate into the interior through the gaps. In addition, the water resistance of the prefabricated panels themselves is limited, and long-term exposure to the natural environment may lead to material aging and internal structural loosening, further exacerbating the risk of leakage. Therefore, the construction team must strictly control the joint treatment process and recommend that homeowners regularly inspect the condition of the roof waterproofing layer.
II. Floor Slab Cracks, Water Leakage, and Curing Defects
Cracks in prefabricated panel floor slabs often occur due to lapses in the vibration and curing processes during construction. If the vibration is insufficient during construction, pores or insufficient compactness may exist inside the concrete, leading to a decrease in structural strength. Inadequate curing (such as not covering with a moisture-retaining film or insufficient curing time) will cause the concrete moisture to evaporate too quickly, resulting in shrinkage cracks. Although small cracks are normal, they should be promptly repaired with materials such as epoxy resin. If the crack width exceeds 0.3 millimeters or is through-going, it may affect structural safety and require pressure grouting by a professional team. Homeowners should request that the construction team provide complete curing records and regularly observe whether new cracks appear on the floor slab.
III. Hazards of Construction Teams Recommending Prefabricated Panels for Speed
Some construction teams may excessively recommend prefabricated panels to shorten the construction period and reduce costs, ignoring the advantages of cast-in-place floor slabs. Cast-in-place floor slabs are poured as a whole with a double-layer steel mesh and concrete, offering strong structural integrity, good seismic performance, and the flexibility to adjust thickness and shape according to design requirements. In contrast, prefabricated panels are prefabricated components, and their joints can easily become weak points in the structure. After long-term loading, cracks may expand due to uneven settlement. When choosing a construction plan, homeowners should first consult the opinions of structural engineers, clarify the house usage requirements (such as whether additional mezzanines are needed or whether the location is in an earthquake zone), and avoid potential safety hazards caused by the construction team's one-sided pursuit of speed.
