What Walls Are Suitable for Prefabricated Slab Houses

For prefabricated slab houses, it is recommended to choose lightweight partition boards, steel-framed lightweight panels, or color-steel sandwich panels based on the usage scenario, while also considering reinforcement needs and key indicators comprehensively.

I. Mainstream Partition Wall Material Selection

1. Lightweight Partition Boards (such as calcium silicate boards, GRC boards):

   • Core Advantages: Low density (400-800kg/m³), significantly reducing the load on prefabricated floors; sound insulation up to 40-52dB, meeting the requirements for residential separating walls; fire resistance exceeding 3 hours (Grade A fireproof), ensuring high safety.
   • Suitable Scenarios: Internal partition walls in residential buildings, places requiring high sound insulation (such as conference rooms, audio-visual rooms).

2. Steel-Framed Lightweight Panels:

   • Core Advantages: Composed of lightweight concrete and a steel frame, with a compressive strength of ≥2.4MPa and a self-weight of only 65-95kg/㎡; seismic intensity up to Grade 8, providing strong structural stability.
   • Suitable Scenarios: Industrial plants, rail transit, and other scenarios with high requirements for load-bearing capacity and seismic resistance.

3. Color-Steel Sandwich Panels:

   • Core Advantages: Quick construction (modular installation), with a thermal conductivity as low as 0.035, offering excellent thermal insulation; surface galvanized or coated for strong corrosion resistance.
   • Suitable Scenarios: Temporary buildings, clean rooms (such as food processing, pharmaceutical production), or humid environments.

II. Reinforcement and Renovation Recommendations

1. Original Wall Reinforcement:

   • If the original wall is an old brick structure, reinforced concrete sandwich walls can be added, i.e., pouring reinforced concrete layers on both the inner and outer sides of the wall to enhance load-bearing capacity and lateral resistance.

2. Enhancing the Integrity of Prefabricated Slabs:

   • To address the issue of cracking at the joints of prefabricated slabs, a reinforced concrete composite layer (5-8 cm thick, with a concrete grade not lower than C25) can be poured on the roof, enhancing overall stiffness through steel mesh reinforcement.

III. Key Selection Indicators

1. Basic Performance:
   • Density, sound insulation, fire resistance grade, and compressive strength should be comprehensively matched to requirements (e.g., lightweight partition boards with a density of 400-800kg/m³, sound insulation of 40-52dB, and fire resistance of Grade A).
2. Construction Details:
   • Panel joints should be filled with special mortar, with a joint width of ≤5mm; single-point hanging capacity should be >100kg (to prevent detachment when installing heavy objects); in humid areas, moisture-resistant panels (such as calcium silicate boards) should be selected.

IV. Precautions

Early cement prefabricated slab walls have been banned due to poor thermal insulation and insufficient structural stability, and are now mostly replaced by cast-in-place slabs; if prefabricated concrete wall panels are to be used, it is essential to ensure compliance with current engineering standards. It is recommended to prioritize referring to manufacturer technical guidance (such as Hebei Yuefeng Building Materials providing installation design solutions) and select manufacturers nearby to reduce logistics costs.