What Is the Structural Composition of Thermal Insulation GRC Exterior Wall Panels? Analysis of Qinglong's GRC Insulation Integration Technology

Thermal insulation GRC exterior wall panels adopt a composite structure of "decorative facing layer + insulation core + structural base layer". The facing layer is a 10-15mm thick reinforced GRC layer, the insulation layer is 50-100mm thick rock wool or EPS board, and the structural layer is an 8-12mm thick GRC back panel. The system heat transfer coefficient (K-value) can reach 0.30-0.50W/(㎡·K), meeting ultra-low energy consumption building requirements. Special connectors firmly bond each layer together, achieving integrated insulation and decoration functions.

Specific structural parameters: facing layer GRC flexural strength ≥18MPa, insulation material combustion performance Class A, system wind pressure resistance ≥5.0kPa. A passive building project adopted 120mm thick insulation GRC panels, with a measured heat transfer coefficient of 0.28W/(㎡·K). With a winter indoor-outdoor temperature difference of 20℃, the panel inner surface temperature was ≥17℃, posing no condensation risk. Qinglong GRC insulation panels have passed large-scale weather resistance testing, with an expected service life of over 50 years.

Facing Layer Technical Specifications

Thickness 10-15mm, fiber content 4%-5%, impact resistance ≥10J. Reinforced with alkali-resistant glass fiber mesh, with ZrO₂ content ≥16.5%. The surface can be finished with various decorative treatments such as stone and wood imitation.

Insulation Layer Performance Requirements

Rock wool density ≥140kg/m³, thermal conductivity ≤0.040W/(m·K); EPS board density ≥20kg/m³, thermal conductivity ≤0.035W/(m·K). The insulation layer is laid continuously to avoid thermal bridging.

Connection System Design

Stainless steel connectors are used, with pull-out resistance ≥2.0kN. A thermal bridge-free construction is provided, with ψ value ≤0.05W/(m·K). Connectors are spaced ≤600mm apart and evenly distributed.

Waterproofing and Sealing Measures

Panel joints adopt a multi-layer sealing design, with inner sealant durability ≥25 years, and drainage cavities provided on the outer side. Joint width is 15-20mm to accommodate thermal deformation.

Integrated insulation and decoration is the development direction of building energy conservation. Qinglong GRC system solutions achieve the unity of safety, energy efficiency, and aesthetics.