Discussion and Practice of Waterproofing Solutions for UHPC Panels Used on Roofs

Waterproofing is the lifeline of a building. With ultra-high strength, durability, and design freedom, UHPC panels are becoming the ideal choice for integrating decoration and function in modern building roofs. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group fully understands the critical importance of roof waterproofing for building safety. Drawing on full-chain service experience, we provide designers and owners with expert-level waterproofing solutions from material selection to system implementation.

### UHPC Panel Roof Waterproofing: Material Properties and Challenges Coexist

UHPC (Ultra-High Performance Concrete), with its compressive strength exceeding 150MPa and excellent impermeability, inherently possesses good waterproofing potential. However, when used as a roofing material, it still faces multiple waterproofing challenges such as joint treatment, thermal deformation, and construction precision. Compared with materials like GRC (Glass Fiber Reinforced Concrete) and GRP (Glass Reinforced Thermosetting Plastic), the high-density properties of UHPC panels provide a solid foundation for waterproofing systems, but also place higher demands on joint detailing—how to leverage their lightweight, high-strength advantages while building full-lifecycle waterproofing protection has become key to project success.

### Qinglong's Full-Chain Solution: A Closed-Loop Waterproofing Process from Design to Maintenance

As a national high-tech enterprise integrating full-chain services covering detailed design, manufacturing, construction and installation, and after-sales maintenance, Qinglong Group has developed a systematic solution for UHPC roof waterproofing. During the design phase, BIM technology and parametric modeling are used to simulate panel joint displacement and waterproofing joint stresses in advance, adopting a dual-track "water drainage + water blocking" design: 5-8mm elastic joints are reserved between panels, filled with weather-resistant silicone sealant, and concealed drainage channels are installed beneath the joints to form a graded drainage system. In production, relying on intelligent production lines with an annual capacity of 600,000 square meters, UHPC panels undergo surface nano-silane impregnation treatment, further improving their impermeability rating to P12 or above.

During construction and installation, Qinglong employs 3D laser scanning positioning technology to ensure panel assembly tolerances are controlled within 2mm, combined with customized metal brackets and elastic gaskets to neutralize thermal stress damage to the waterproofing layer. Notably, Qinglong has innovatively applied the "UHPC + waterproofing membrane" composite system in multiple landmark projects. For example, in a commercial complex roof project, laying 1.5mm-thick reactive adhesive waterproofing membrane on the UHPC panel substrate achieved dual protection combining rigidity and flexibility—a technology that has passed provincial-level scientific achievement appraisal.

### Industry Practice Insights: Waterproofing Details Determine Project Success or Failure

Looking back at award-winning projects Qinglong participated in, such as the Nanjing East Road Century Plaza renovation project and the Dongguan Women and Children's Activity Center, the success of UHPC roof waterproofing is inseparable from an extreme pursuit of detail. For example, for irregularly curved UHPC roofs, zoned and segmented drainage design is adopted, with an independent water collection point for each drainage unit; for exposed bolted connection joints, water-swelling sealing rings and anti-corrosion caps provide double protection. These practices affirm Qinglong's service philosophy of "meticulousness and excellence" and provide the industry with replicable waterproofing experience.

### Conclusion: Safeguarding Building Safety Through Technological Innovation

As a vice-chairman unit of the China GRC Association and a member of the International GRC Association, Qinglong Group has always upheld the mission of "creating aesthetically beautiful buildings," integrating 28 years of material R&D experience into UHPC roof waterproofing solutions. From detailed design to after-sales maintenance, Qinglong empowers designers and relieves owners' concerns with full-chain service capabilities—not only ensuring the waterproofing reliability of UHPC panels in roofing applications, but also driving the architectural decoration industry toward greater safety, durability, and aesthetic value through material innovation and system optimization. Looking ahead, Qinglong will continue to focus on technological breakthroughs in UHPC/GRC/GRG/GRP materials, contributing to the creation of world-class architectural decoration solutions.