First-Floor Prefabricated Panel House

For moisture prevention in a first-floor house with prefabricated panels, a suspended prefabricated panel layer can be used. The principle is to exchange space for dryness. A cavity of 30 - 50 centimeters is left between the foundation and the first-floor ground, allowing underground moisture to rise into the cavity and dissipate, preventing it from reaching the first-floor ground and thus avoiding dampness. The following provides further introduction from aspects such as the characteristics and existing problems of prefabricated panel houses:

Component Characteristics of Prefabricated Panel Houses

Prefabricated panel houses are buildings constructed mainly with prefabricated panels. Prefabricated panels are cement components pre-fabricated in factories. During production, a wooden model is first nailed together, then steel bars are arranged inside the model, and finally, cement is poured to form the panel. Prefabricated panels come in two types: solid and hollow. The design of the hollow structure achieves lightweighting by reducing the non-load-bearing concrete, which not only ensures that the prefabricated panel has a certain load-bearing capacity but also reduces its own weight, facilitating transportation and installation.

Existing Problems of Prefabricated Panel Houses

• Weak Earthquake Resistance: The connections between the components of prefabricated panel houses are relatively not tight and firm enough. When subjected to strong external forces such as earthquakes, relative displacements are likely to occur between the components, leading to damage or even collapse of the building structure. Their earthquake resistance is significantly weaker than that of some buildings with monolithic cast-in-place structures.
• Poor Sound Insulation and Thermal Insulation: The material and structural characteristics of prefabricated panels result in deficiencies in sound insulation and thermal insulation. Since the interior of prefabricated panels is mostly cement material, and the air layer in the hollow structure has limited blocking effects on sound and heat, external noise can easily enter the interior, and indoor heat can also easily dissipate, affecting the comfort of living.
• Limited Service Life: The service life of prefabricated panel houses is approximately 30 - 50 years. Over time, prefabricated panels are affected by the natural environment, such as wind, sun, and rain, leading to problems such as aging and cracking of the cement. The steel bars may also rust, affecting the overall structural safety and service performance of the house.