Prefabricated Wooden House Materials

The materials for prefabricated wooden houses need to be determined based on the specific type. Common types include SIP composite houses and traditional prefabricated panel houses, with significant differences in materials between the two. The following is a detailed analysis:

SIP Composite Houses
SIP (Structural Insulated Panel) composite houses are a type of panel-based wooden structure house, installed on-site using prefabricated panels. Their core materials include:

1. Panel Materials: Typically, OSB (Oriented Strand Board) is the primary choice due to its high strength, good dimensional stability, and moisture resistance, making it suitable as a structural layer. Alternatively, magnesium oxide boards (fire-resistant, moisture-resistant, and corrosion-resistant) or cement fiber boards (fire-resistant and impact-resistant) can be selected, although the latter is more expensive and mainly used in scenarios with strict fire safety requirements.
2. Core and Insulation Materials: Polyurethane (PU) is commonly used as the core material due to its closed-cell structure, which results in a low thermal conductivity coefficient and excellent insulation performance. EPS (Expanded Polystyrene Foam) can also be chosen for its lower cost, although it has slightly weaker fire resistance. To enhance fire resistance, rock wool (a Class A non-combustible material) can be filled, but it should be noted that rock wool has strong water absorption and requires moisture-proof treatment.
3. Connectors: Metal connectors (such as galvanized steel components) or specialized adhesives are used to ensure structural stability between panels.

Traditional Prefabricated Panel Houses
If referring to traditional concrete prefabricated panel houses (non-wooden structures), their materials and processes are as follows:

1. Structural Materials: Primarily composed of concrete and steel reinforcement. During fabrication, a hollow mold is first made using wooden boards, with a steel reinforcement mesh or framework placed inside. Concrete is then poured into the mold, and after forming, the wooden boards are removed to create prefabricated panels.
2. Auxiliary Materials: Wooden boards serve only as temporary molds and do not participate in structural loading; steel reinforcement provides tensile strength, while concrete provides compressive strength, working together to ensure structural load-bearing capacity.
3. Application Scenarios: Mainly used in multi-story residential or industrial buildings, but they have drawbacks such as heavy self-weight and poor earthquake resistance, gradually being replaced by cast-in-place concrete structures.

Key Differences
SIP composite houses focus on lightweight wooden-based panels, emphasizing the integration of insulation and structure; traditional prefabricated panel houses rely on concrete, prioritizing structural load-bearing capacity. When choosing, comprehensive considerations should be given to building function, cost, and environmental requirements.