Waterproofing Treatment Plans and Key Technologies for UHPC Roof Panels

In contemporary architectural design, ultra-high performance concrete (UHPC) has gradually become an ideal material choice for roofing systems thanks to its outstanding mechanical properties and durability. However, as the first line of defense in building waterproofing, the professionalism of a roof's waterproofing treatment directly determines a building's service life and safety. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group draws on its full-chain technical experience to provide designers and owners with systematic UHPC panel roof waterproofing solutions that balance material characteristics with engineering effectiveness.

Technical Challenges and Core Requirements of UHPC Panel Roof Waterproofing

Although UHPC panels have the natural advantages of high strength and low porosity, their roof applications still face three major waterproofing challenges: first, the sealing of panel joints, as traditional waterproofing materials struggle to accommodate UHPC's coefficient of thermal expansion and contraction; second, waterproofing weak points at fastener penetration areas, requiring solutions to the sealing challenge between anchor bolts and panels; third, weather resistance requirements under long-term exposure, needing to withstand UV rays, temperature changes, and chemical corrosion. Addressing these pain points, Qinglong leverages the technical accumulation of its national-level R&D center to form a full-process solution from material selection to construction techniques.

Layered Waterproofing System: From Substrate Treatment to Surface Protection

Qinglong's UHPC roof waterproofing solution adopts a “three-layer protection” technical approach: the base treatment layer uses a dedicated interface agent to enhance the bond between UHPC panels and the waterproofing layer, solving the interface delamination problem of traditional cement-based materials; the core waterproofing layer uses Qinglong's self-developed reactive polyurethane waterproofing coating, with elongation exceeding 300%, effectively accommodating the minor deformation of UHPC panels; the surface protection layer combines GRP daylighting panels or UHPC decorative surface layers, unifying physical protection with decorative effect. This system has been validated in practice through projects such as the Nanjing East Road Century Plaza renovation, with a waterproofing warranty of up to 15 years or more.

Key Node Treatment: Bolt Sealing and Joint Structure Innovation

Targeting the weak links in roof waterproofing, Qinglong has developed two patented technologies: the first is the “metal bolt waterproofing assembly,” which uses dual sealing with an elastic sealing ring and an expansion water-stop ring to reduce the water leakage risk at bolt penetration areas to zero; the second is the “stepped joint structure,” which uses UHPC-specific sealant and backing materials to form multiple waterproofing barriers while reserving expansion buffer space. These detail treatments have been successfully applied in projects such as the Dongguan Women and Children's Activity Center, and verified by third-party testing institutions, with joint waterproofing performance reaching the P12 standard.

Full Life-Cycle Assurance: From Detailed Design to After-Sales Maintenance

As an enterprise integrating full-chain services of detailed design, manufacturing, construction and installation, and after-sales maintenance, Qinglong emphasizes the integrity of the waterproofing system. In the design phase, BIM technology is used to simulate the impact of thermal deformation on the waterproofing layer; in production, automated production lines ensure the dimensional accuracy of UHPC panels; during construction, a “three-level quality inspection” system is implemented, including substrate moisture content testing, coating thickness monitoring, and water ponding tests; in the after-sales phase, regular inspections and waterproofing maintenance services are provided. This full-process control model has earned high customer recognition for Qinglong's UHPC roof waterproofing system in overseas projects in Malaysia, Australia, and beyond.

As green building and long life-cycle concepts continue to deepen, UHPC panel roof waterproofing technology will develop toward material compositing, refined structural design, and integrated services. Qinglong Group will continue to leverage its technical advantages as a national “specialized, refined, distinctive, and innovative” enterprise, building on 28 years of industry experience to provide architects with more innovative and reliable solutions, helping to fulfill the corporate mission of “creating aesthetically beautiful buildings.”