Introduction to prefabricated houses with energy-saving and heat-insulating materials

I. Core structure and materials

• Main frame

Aluminum-zinc-plated light steel keel (tensile strength ≥550MPa), molded by cold rolling process, factory prefabrication rate of more than 80%, forming a “cage-type” load-bearing structure, suitable for buildings of less than 6 floors.

The nodes are flexibly connected by bolts or self-tapping screws, and the seismic resistance level reaches 9 degrees (0.4g seismic acceleration), which can disperse seismic energy.

• Configuration of energy-saving and heat-insulating materials

Wall: light steel skeleton + 9mm OSB board + 50mm glass wool (capacity 15kg/m³) + 12mm calcium silicate board, with a total thickness of about 200mm, and a thermal resistance value of 4.24K-m²/W, with thermal insulation performance twice that of traditional brick walls.

Roof: 12mm OSB board + SBS waterproofing membrane + light steel truss, filled with 50mm graphite polystyrene board (thermal conductivity ≤ 0.033W/(m-K)), snow pressure resistance ≥ 1.55kN/㎡.

Doors and windows: double-layer hollow Low-E glass (heat transfer coefficient ≤1.5W/(m²-K)) + broken-bridge aluminum profile to reduce the cold and heat bridge effect.

II. Detailed performance parameters

Structural performance Earthquake-resistant grade 9 degrees (0.4g) / wind pressure ≥ 0.85kN / square meters

Thermal insulation Thermal resistance of the wall 4.24K-m²/W / temperature difference to maintain 13 ℃ advantages

Sound insulation performance Outer wall sound insulation ≥ 65dB / inner wall ≥ 44dB

Energy-saving efficiency Energy consumption reduction of 30% -50% (compared with traditional brick mix)

Environmental indicators 100% recycled steel / construction without wet work and dust

Design life ≥ 50 years (aluminum-zinc anti-corrosion treatment)

Construction cycle 100 square meters single layer ≤ 1 month (including assembly and decoration)

III. Technical Highlights

• Layered composite structure

The wall adopts the combination of “rigid skin + flexible filling”, OSB board and light steel skeleton form a shear-resistant layer, and glass wool filling improves airtightness, realizing double optimization of heat preservation and structural strength.

• Prefabricated integration process

Enclosure panels and pipe casing are pre-buried in the factory, and only need to be assembled on site, with the error controlled within ±2mm, reducing material waste.

• Ecological adaptability

The roof is equipped with photovoltaic tiles (optional), combined with the new air heat recovery system (efficiency ≥ 75%), realizing near-zero energy consumption living.

Comparison of classification of energy-saving heat-insulating materials:

• Organic heat-insulating materials

• Extruded polystyrene board (XPS board)

Thermal conductivity: 0.028-0.030 W/(m-K)

Density: 25-35 kg/m³

Applicable temperature: -50℃~75

Characteristics: high strength, moisture resistance, suitable for roofing, basement and other high humidity environment

• Expanded polystyrene board (EPS board)

Thermal conductivity: 0.038-0.041 W/(m-K)

Density: 15-30 kg/m³

Applicable temperature: -40℃~70

Characteristics: low cost, easy processing, widely used in building exterior walls and roofs

• Polyurethane foam

Thermal conductivity: 0.025-0.028 W/(m-K)

Density: 35-50 kg/m³

Applicable temperature: -60℃~120

Characteristics: high closure rate, excellent waterproof performance, suitable for cold storage, laboratories and other harsh environments.

• Inorganic thermal insulation materials

• Rock wool board

Thermal conductivity: 0.041-0.045 W/(m-K)

Density: 80-150 kg/m³

Applicable temperature: ≤600℃

Characteristics: Fireproof grade A, suitable for industrial plants, high temperature pipeline

• Aluminum silicate cotton

Thermal conductivity: ≤0.07 W/(m-K)

Density: ≤220 kg/m³

Applicable temperature: >1000°C

Characteristics: high temperature resistance, used in metallurgy, electric power and other industries, high temperature equipment

• Foamed cement

Thermal conductivity: 0.08-0.28 W/(m-K)

Density: 300-1600 kg/m³

Applicable temperature: conventional building environment

Characteristics: fire retardant, simple construction, suitable for floor heating insulation layer

• Composite heat-insulating materials

• Aerogel heat insulation material

Thermal conductivity: 0.012-0.016 W/(m-K)

Density: 0.16 mg/cm³

Applicable temperature: -200°C~650°C

Characteristics: nanoporous structure, ultra-lightweight, used in aerospace, lithium batteries and other high-end fields

• EVB energy-saving high-strength thermal insulation board

Thermal conductivity: not directly labeled, but through the composite structure (convection heat dissipation layer) to enhance the thermal insulation efficiency

Structure: Finish layer + load-bearing layer + heat-insulating layer, total thickness 90mm.

Applicable scenes: the roof or wall that needs natural ventilation to dissipate heat.

• New Reflective Heat Insulation Materials

• Aluminum foil heat insulation coil

Reflectivity: ≥92% of solar radiation 

Thermal conductivity: Depends on the thickness of the air layer, usually equivalent to 0.03-0.05 W/(m-K).

Characteristics: moisture-proof and water-proof, convenient construction, suitable for quick remodeling projects.

Why Choose Us

Shijiazhuang Eiffel Steel Structure Co., Ltd.

Shijiazhuang Eiffel Steel Structure Co., Ltd. is an enterprise dedicated to researching and developing new energy-saving and environmentally friendly houses and construction methods. We always adhere to the values of honesty and quality first, and position ourselves as a leader in high-quality steel structure villa construction. We combine emerging foreign technologies with the actual domestic market and provide customers with one-stop services for prefabricated buildings such as design, production, interior decoration, and whole house customization. The prefabricated buildings produced by the company are widely used in office buildings, villas, rural courtyards, estate clubs, tourist attractions, homestays, hotels, public facilities, etc. 

At present, the company is centered in Shijiazhuang, Hebei Province, with products radiating to regions such as Beijing, Tianjin, Hebei, Shanxi, Shandong, Henan, Liaoning, Mongolia, Jiangsu, Sichuan, and Guangxi, and exported to overseas markets. Adhering to the quality demand of "building a century old villa, choose Eiffel", we strive to create an excellent brand of prefabricated buildings.

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