Prefabricated House Exterior Wall

There are various types of prefabricated house exterior walls, each with distinct characteristics. Here is a detailed introduction:

Characteristics of Pre-cast House Exterior Walls

Pre-cast houses (prefabricated assembled buildings) mainly include panel-assembled, box-assembled, and frame-assembled types. Panel-assembled buildings use pre-cast wall panels and floor slabs as core components, which can expand the usable area but have limited design flexibility. Box-assembled buildings combine pre-fabricated functional units, increasing construction speed by 50%-70%, but requiring higher transportation and lifting equipment.

Container-style Prefabricated House Exterior Walls

These walls use metal corrugated panels paired with double-layer hollow Low-E glass and have built-in insulation layers for long-lasting thermal insulation.

Concrete Exterior Wall Panels

• Definition and Function: Made of reinforced concrete, these panels are used for the external enclosure structure, serving both enclosure and decorative purposes, and offering functions such as thermal insulation, fire resistance, and heat insulation.
• Common Types: There are pre-cast concrete external cladding panels (composed of inner and outer leaf panels with a sandwich insulation layer) and ultra-high-performance concrete exterior wall panels, among others.
• Basic Characteristics:
  • Classification: According to the insulation structure hierarchy, they are divided into single-leaf panels, two-in-one panels, and three-in-one panels; the typical structure consists of inner leaf panels, outer leaf panels, sandwich insulation layers, connectors, and facing layers.
  • Material Requirements: The concrete strength grade should not be lower than C30, and the reinforcement should preferably be HRB400 grade steel or cold-drawn low-carbon steel wire; reinforcement should be double-layered and bidirectional, with a diameter not less than 5mm and a spacing not greater than 200mm; insulation layer materials are divided into organic and inorganic types, with organic materials having a thermal conductivity not greater than 0.04W/(m·k), a combustion performance not lower than B2 grade, and inorganic materials having a combustion performance meeting A grade requirements.
  • Connection Method: The exterior wall panels are connected to the main structure using point-supported flexible connections, with connection nodes divided into load-bearing and non-load-bearing nodes, and specific connection methods including translational and rotational types.
  • Waterproof Design: It mainly relies on sealant materials (physical properties) and cavity structures (structural properties).

Integrated Insulation Structure Prefabricated Exterior Walls for Prefabricated Concrete Residential Buildings

The "Construction Guide for Integrated Insulation Structure Prefabricated Exterior Walls for Prefabricated Concrete Residential Buildings" issued and implemented in Hubei Province introduces two types of products: pre-cast concrete sandwich insulation exterior wall panels and pre-cast concrete reverse-cast insulation exterior wall panels. It has formulated technical standards tailored to local needs, covering the entire process from design to acceptance, which is of great significance for improving building quality and promoting energy conservation and emission reduction.