Polyurethane Insulation
2026-03-27
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Polyurethane Insulation: The Core Thermal Insulation Technology for Prefab Houses, Creating a Year-Round Livable Space
In the performance design of prefab houses, thermal insulation is a key factor determining living comfort. Hongyuan Yunshe applies high-density polyurethane insulation to the interlayers of space capsules, apple capsules and other prefab houses. With its excellent thermal insulation performance, it solves the pain point of "cold in winter and hot in summer" in outdoor buildings, creating a modular space livable all year round.
1. Core Performance Advantages of Polyurethane Insulation
1.1 Ultra-Low Thermal Conductivity for Dual Heat Preservation & Insulation
The high-density rigid polyurethane foam used has a thermal conductivity of only 0.024W/(m·K), far superior to traditional insulation materials such as rock wool (0.04W/(m·K)) and polystyrene boards (0.039W/(m·K)). In winter, it effectively locks indoor heat and reduces heating energy consumption; in summer, it blocks external high temperatures and lowers air conditioning usage, achieving both energy saving and comfort.
1.2 Seamless Filling to Avoid Thermal Bridge Effect
Polyurethane insulation is seamlessly filled between the steel structure and exterior facade of the cabin via high-pressure foaming technology, forming a complete insulation layer. This eliminates the "thermal bridges" caused by splicing traditional insulation materials, preventing heat loss or infiltration through gaps and keeping the indoor temperature stable.
1.3 Moisture & Water Resistance for Complex Environments
Polyurethane foam has a closed-cell structure with a water absorption rate of less than 3%, effectively blocking the penetration of external moisture and water. Even when used in humid environments such as coastal areas, rainforests and alpine regions, the insulation layer will not get damp or moldy, while also improving the moisture resistance of the cabin.
1.4 Structural Stability with Compression & Sound Insulation
The polyurethane insulation layer has a compressive strength of ≥200kPa, able to bear the load pressure of the cabin structure without deformation or collapse, with a service life synchronized with the cabin. Meanwhile, its porous structure can effectively absorb sound waves; paired with double-layer hollow glass, the indoor sound insulation effect can reach over 40 decibels, creating a quiet living environment.
2. Application Process of Polyurethane Insulation in Prefab Houses
- High-Pressure Foaming Pouring: During the factory prefabrication stage, polyurethane raw materials are poured into the cabin interlayer via a high-pressure foaming machine. The raw materials quickly foam, expand and solidify to form an insulation layer fitting the interlayer.
- Multi-Layer Composite Protection: The outer side of the insulation layer is paired with exterior materials such as aluminum composite panels and color steel plates, and the inner side is paved with bamboo fiber boards, which not only protect the insulation layer from damage but also enhance the indoor aesthetics and texture.
- Detailed Sealing Treatment: Polyurethane sealant is additionally filled at heat-leaking parts such as door/window frames and pipe interfaces to further strengthen the insulation effect and prevent heat loss.
3. Scenario Adaptability of Polyurethane Insulation
3.1 Alpine Region Scenario
In alpine regions with temperatures below -20℃ (e.g., Northeast and Northwest China), the polyurethane insulation layer can keep the indoor temperature 15-20℃ higher than the outside. Comfortable living can be achieved with electric heaters alone, without complex heating systems.
3.2 High-Temperature & Humid Region Scenario
In high-temperature and humid regions such as southern coastal areas and rainforests, the insulation layer blocks external heat and moisture, keeping the indoor temperature 8-10℃ lower than the outside. Cooperating with air conditioning can significantly reduce energy consumption.
3.3 Outdoor Commercial Scenario
For commercial prefab houses such as scenic spot kiosks and coffee pods, polyurethane insulation maintains a constant indoor temperature, avoiding negative impacts on commodity storage and customer experience caused by extreme temperatures.
Through the in-depth application of polyurethane insulation technology, Hongyuan Yunshe enables prefab houses to break through the limitations of ambient temperature and provide a comfortable user experience in various outdoor scenarios. Whether it is a homestay in alpine mountains or a commercial pod on tropical coasts, the polyurethane insulation layer serves as the "thermal barrier" of prefab houses.
Consultation for Custom Prefab House Insulation is Open!
To learn about the application details of polyurethane insulation or customize prefab houses with better thermal insulation performance, contact us via WhatsApp (+86 139 3339 8557) and create a year-round livable modular space for your project.
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