What Are the Steps of GRC Installation: Detailed GRC Installation Step Analysis and Operation Guide

Precision installation is the core element for GRC components to achieve both aesthetic value and structural safety. As an industry player with 28 years of experience in GRC detailed design and construction, we will analyze the key points of the entire GRC installation process from a professional perspective, providing designers and project owners with a practical, actionable guide.

Technical Preparation Before GRC Installation: From Drawing Refinement to Material Acceptance

Quality GRC installation begins with rigorous preliminary preparation. First, the BIM model must be verified against on-site dimensions, using 3D scanning technology to ensure substrate structure errors are controlled within ±5mm—this is the foundation for precise joining of complex shapes. Upon material delivery, focus on checking the flexural strength of GRC components (should be ≥15MPa), surface flatness, and embedded part positions, and conduct sampling tests in accordance with the Technical Standard for Building Applications of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018) to eliminate installation risks caused by material defects. For special-shaped components such as double-curved surfaces, factory pre-assembly is recommended to resolve potential on-site dimensional deviations in advance.

Core Process of GRC Installation: From Substrate Treatment to Anchoring and Fixing

During the substrate treatment stage, an appropriate solution must be selected based on the wall material: concrete substrates are fixed with mechanical anchors, while hollow walls require a steel structure transfer layer, ensuring no fewer than 4 anchoring points per square meter. For installation layout, use a laser line projector for positioning, with horizontal line errors controlled within 2mm/m and corner squareness deviations not exceeding 3mm. Component hoisting should use specialized lifting devices; for GRC components weighing more than 50kg, a temporary support system should be set up to prevent deformation during hoisting. Anchoring node construction must strictly follow the design torque values (typically 35-45N·m) and adopt double-nut anti-loosening measures; stainless steel connectors should be used at critical positions to enhance weather resistance.

Seam Treatment and Waterproofing Techniques: Ensuring GRC System Durability

GRC component joints are critical nodes for waterproofing and should adopt a composite process of "elastic sealing + backing filling": first fill the joint cavity with closed-cell foam rods, then inject weather-resistant silicone sealant (with movement capability ≥25%), keeping the sealant joint width between 8-15mm. For areas with frequent rainfall, it is recommended to add EPDM waterproof membrane on the inner side of joints to form a double waterproof barrier. For surface treatment, note that after GRC components are installed, at least 2 rounds of repair and polishing should be performed to ensure the flatness at joints is consistent with the parent body. Finally, spray a dedicated protective coating as required by the design to enhance stain resistance and anti-aging performance.

Quality Acceptance and Safety Control: Building a Full-Process Assurance System

Installation quality acceptance requires a three-level inspection system: team self-inspection focuses on the number of anchoring points and position deviations, project department re-inspection focuses on overall verticality (≤3mm/2m) and joint flatness, while third-party testing conducts sampling tests on load-bearing capacity. In terms of safety control, fall protection devices must be installed for work at heights, and scaffolding should meet the hoisting load requirements of GRC components (typically ≥2kN/m²). Notably, large GRC curtain wall systems should undergo on-site water spray tests to simulate waterproofing performance under extreme rainfall conditions, ensuring structural safety throughout the system's 20-year service life.

As a national high-tech enterprise and a participant in GRC industry standard setting, Qinglong has always believed that scientific installation techniques are the key to maximizing the value of GRC materials. From parametric modeling in the detailed design stage, to millimeter-level precision control during construction, and to full life-cycle management in later maintenance, only the technical expertise of a professional team combined with standardized processes can ensure that every GRC project both realizes the architect's creative vision and meets the baseline requirements of building safety. In the field of new architectural decorative materials, only by deeply integrating technical rigor with artistic expression can architectural works that stand the test of time be achieved.