Polyurethane Great Wall Board Roofing

The core insulation layer adopts high-density rigid polyurethane foam material with a thermal conductivity as low as 0.022W/(m·K), which is far superior to the EU CE energy efficiency standard. With a closed cell rate of over 95%, the board can effectively block water vapor penetration and avoid the attenuation of energy-saving performance caused by damp insulation layer. After long-term use, the thermal insulation effect can still maintain more than 90% of the initial state, significantly reducing the energy consumption of building heating and cooling and helping to achieve the goal of ultra-low carbon buildings.

The surface layer is made of 0.4-0.6mm thick high-zinc color-coated steel plate. After fluorocarbon coating treatment, its salt spray corrosion resistance reaches more than 5000 hours, which can adapt to harsh environments such as coastal high salt spray and industrial pollution, and the surface can remain rust-free and fade-free after long-term use. The wavy structure of the board is optimized by finite element analysis, and its bending bearing capacity is 65% higher than that of a flat plate of the same thickness. It can bear a uniform load of 0.5kN/㎡, meeting the normal walking needs of roof maintenance personnel. According to third-party testing, the board can resist level 12 typhoons (wind speed 32.7m/s) and hail impact with a diameter of 50mm, and has adaptability to all climatic environments.

Innovatively adopts a dual waterproof design of "structural self-waterproofing + sealing reinforcement". The edge of the board is equipped with a bite-type lock edge, which forms a labyrinth waterproof channel when spliced, blocking the direct penetration path of rainwater. The lap joint uses weather-resistant silicone sealant, which still does not crack after 500 cycles of high and low temperature tests from -40℃ to 80℃, adapting to extreme temperature difference environments. The surface of the board is smooth and has a wavy drainage slope, and the rainwater discharge speed is 30% higher than that of a flat roof, which greatly reduces the risk of roof water accumulation and achieves the waterproof effect of long-term anti-seepage with one construction.

The unit area weight of the product is only 10-15kg/㎡, no large hoisting equipment is needed, and the installation can be completed by a team of 2-3 people. The effective width of the board is 900mm, and the length can be customized according to the roof size (up to 6 meters), which can significantly reduce the number of splicing seams. No on-site cutting is required during installation, only special self-tapping screws are needed for fixing, and a screw spacing of 500mm can meet the fixing requirements. The operation is simple and easy to learn, adapting to the technical level of construction teams in different regions, effectively shortening the construction period and reducing labor costs.