What Is the Spacing for GRC Installation? Qinglong GRC Installation Joint Width Control Standards

The GRC installation joint width must be determined comprehensively based on panel dimensions, thermal deformation, construction tolerances and other factors, and is generally controlled at 6-12mm. Joints that are too narrow may crack due to thermal deformation, while overly wide joints affect aesthetics.

In the Shenzhen Pingshan High-tech Zone project, Qinglong set the installation joint width at 10mm based on local climate characteristics. A gap of 8mm was reserved for summer installation and 10mm for winter, to accommodate thermal deformation. Special joint width control gauges were used to ensure uniform and consistent joint widths. After withstanding two winters and summers, the panel joints show no abnormalities, proving that the joint width settings were appropriate.

Calculation of Joint Width for Thermal Deformation

The deformation amount is calculated based on the local annual temperature difference; 8-10mm is recommended for the Guangdong region. Large-area panels require appropriately wider joints. Expansion joints should be set at internal and external corners. Calculations must account for long-term deformation.

Construction Tolerance Control Requirements

The setting-out tolerance is ±1mm and the installation tolerance is ±2mm. Cumulative errors must be absorbed within the joint width. Large-area installations require adjustment joints. Tolerance control ensures uniform joint widths.

Aesthetic Joint Width Design

8-12mm is recommended for public buildings and 6-8mm for residential buildings. Horizontal joints may be slightly wider than vertical joints. Special-shaped areas require separate design. Joint widths must coordinate with the architectural style.

Functional Joint Width Determination

Areas with high waterproofing requirements should have appropriately wider joints. Seismic joints are set according to codes and standards. Deformation joints correspond to structural joints. Functional requirements are given priority.

Reasonable joint width design requires professional calculation and experience. With extensive experience, Qinglong GRC provides customers with optimal solutions.