Detailed Construction Process for Renovating Existing Building Facades with UHPC Panels

The revitalization of existing buildings begins with the exterior walls—UHPC panels empower renewal through technology, giving old buildings a new lease on life.

With the accelerating pace of urban renewal, exterior wall renovation of existing buildings has become a key topic in enhancing building aesthetics and performance. Ultra-high performance concrete (UHPC), with its ultra-high strength, excellent durability, and rich formability, is becoming the material of choice in the field of exterior wall renovation. As an industry leader with 28 years of expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group will provide a detailed explanation of the standardized construction process for renovating existing building exteriors with UHPC panels from a full-chain perspective, offering professional solutions for designers and owners.

I. Preliminary Assessment and Design: The "Tailored" Stage of UHPC Panel Renovation

The first step in exterior wall renovation of existing buildings is precise assessment. A comprehensive inspection must be conducted on the structural safety of the original building, the condition of the substrate walls, and the extent of finish damage. Combined with the building's functional positioning and aesthetic requirements, the thickness of the UHPC panels (typically 20-50mm), surface texture, and installation method are determined. Leveraging its in-depth design expertise, Qinglong Group can use BIM technology to simulate installation effects and optimize joint details, ensuring the compatibility of UHPC panels with the original building. For example, in a commercial complex renovation project, seamless integration between UHPC panels and the existing curtain wall was achieved through 3D scanning technology, with precision errors controlled within 2mm.

II. Substrate Treatment and Interface Optimization: A "Solid Foundation" for UHPC Panel Installation

Substrate treatment directly affects the installation quality and durability of UHPC panels. First, hollowed and cracked sections of the old wall are removed, and Qinglong's specially formulated interface agent is applied to enhance substrate adhesion, while GRC repair mortar is used to level areas with structural defects. Taking into account the load limitations of existing buildings, Qinglong's lightweight UHPC panels (density ≤2400kg/m³) reduce the load on the original structure, while a hot-dip galvanized steel framework system enables modular installation, balancing safety and construction efficiency.

III. Custom Production and Quality Control of UHPC Panels: "Precision Manufacturing" from Factory to Site

As a manufacturer of custom UHPC products, Qinglong Group has modern production lines with an annual capacity of 600,000 square meters, enabling full-process control from drawing detailing to component forming. Through processes such as automated material distribution and steam curing, UHPC panels achieve a compressive strength of ≥150MPa and a flexural strength of ≥25MPa, meeting long-term weather resistance requirements. Each panel undergoes third-party testing and is embedded with an RFID chip for quality traceability, providing data support for subsequent maintenance.

IV. Precise Installation and Sealing: The "Last Mile" for UHPC Panels

Installation adopts a "3D positioning + dry-hanging" method, with laser levels ensuring panel verticality and flatness, and hangers made of 316 stainless steel for corrosion resistance. Panel joints are sealed with elastic sealant, combined with a pressure-equalized cavity design to prevent rainwater leakage. Qinglong's construction team holds a Grade II qualification for professional curtain wall engineering contracting and has completed benchmark projects such as the Nanjing East Road Century Plaza renovation, achieving precise splicing of UHPC panels under complex conditions.

V. Acceptance and After-Sales Maintenance: "Quality Safeguarding" Throughout the Life Cycle

After completion, comprehensive acceptance inspections covering appearance quality, mechanical performance, and waterproofing must be conducted. Qinglong's after-sales maintenance services include regular inspections, sealant replacement, and structural safety assessments. With a nationwide network of offices, the company can respond quickly to customer needs, ensuring the long-term stable operation of UHPC exterior wall systems.

From design detailing to after-sales maintenance, Qinglong Group, guided by its values of "Honesty, Perseverance, Trust, and Collaboration," provides full-chain UHPC panel solutions for exterior wall renovation of existing buildings. As a National High-Tech Enterprise, Qinglong has participated in formulating industry standards such as the "General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)," driving the upgrading of architectural decoration materials through technological innovation. Choosing UHPC panels is not just choosing a material—it is choosing an approach to building renewal that combines aesthetics with durability.