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This summer, record-breaking heat waves scorched many regions, with ground temperatures hitting historic highs. At the same time, Northern China was battered by unprecedented rainfall, while coastal areas faced the typhoon “Zhu Jie Cao,” bringing fierce winds and heavy storms. Alternating heatwaves and downpours are pushing roofing systems to their limits.
During extreme rainstorms, sudden rainfall often exceeds the drainage capacity of traditional roof panels, leading to severe leakage issues. Strong winds can tear off poorly secured roofing sheets, forcing factories to halt production. Meanwhile, conventional roofing systems, constrained by thermal expansion, structural flaws, and design limitations, often fail under stress, resulting in frequent structural damage.
With decades of expertise in the metal enclosure industry and over one million square meters of proven roofing projects, Hongxinyuan has integrated advanced Japanese roofing technology to develop the SeamFlex65® Standing Seam Metal Roof System. Engineered for superior drainage, wind resistance, structural safety, and climate adaptability, it provides a reliable solution for buildings facing extreme weather conditions.
1. Superior Drainage & Waterproofing
The unique rib profile, combined with a watertight seam-lock design, effectively blocks capillary infiltration. A 92mm deep rib delivers a 34mm safe water channel, far exceeding the drainage threshold of conventional roofing systems. Tested under extreme rainfall, the seam-lock joints maintained zero leakage, ensuring low-slope roofs remain protected against backflow and ponding.
2. Exceptional Wind Resistance
Optimized panel geometry and secure rib-to-bracket connections provide excellent structural stability, preventing wind uplift damage under storm conditions. The system has passed the GB50205-2020 Wind Uplift Test, outperforming standard roofing systems.
3. Versatile Applications
The system accommodates thermal expansion and structural movement, making it ideal for large-span, curved, low-slope, and long-length roofs. It maintains reliable performance in coastal salt-spray zones, industrial corrosion environments, and severe freeze–thaw regions, with customized solutions available to meet diverse project requirements.
4. Easy Installation & Maintenance
Modular installation ensures efficiency and simplicity. If a panel is damaged, the round seam-lock design allows for quick removal and replacement, reducing maintenance time and costs.
5. Superior Corrosion Resistance
Panels are coated with premium high-aluminum zinc-aluminum or zinc-aluminum-magnesium alloy layers. These form a dense crystalline barrier that prevents corrosion, withstands both extreme heat and freeze–thaw cycles, and delivers over 30 years of service life. Smooth seam-locking ensures zero coating damage during installation.
6. Complete Accessory System
A full range of accessories guarantees waterproofing, wind resistance, and long-term stability under harsh conditions such as heavy rain, typhoons, and repeated freeze–thaw cycles.
7. Seamless Integration of Add-On Systems
Solar panels, decorative aluminum sheets, snow guards, and walkways can be mounted without perforation, eliminating leakage risks caused by drilling and ensuring long-term safety while supporting sustainable energy and architectural creativity.
The Headstream SeamFlex65® Metal Roof System delivers industry-leading performance in drainage, wind resistance, and durability. With worry-free maintenance, complete accessory integration, and seamless compatibility with solar and decorative systems, it is the trusted roofing solution that ensures buildings remain safe, stable, and efficient under extreme climate challenges.
