What should be paid attention to when installing glass curtain walls

Installing a glass curtain wall is a complex project involving multiple aspects such as design, materials, construction, and safety. It requires strict control over details to ensure quality and safety. The following are key points to note when installing a glass curtain wall:

1. Preliminary design and planning

Adaptability of building structure

Confirm whether the load-bearing capacity of the main structure (such as concrete frame, steel structure) meets the design load requirements of the curtain wall, to avoid deformation or detachment due to insufficient structural strength.

Taking into account the climatic conditions of the region where the building is located (such as wind pressure, seismic intensity, temperature difference, etc.), design appropriate parameters for wind pressure resistance, seismic resistance, thermal expansion coefficient, etc.

Functional requirement matching

Based on the intended use of the building (such as commercial, residential, or public facilities), select the appropriate type of curtain wall (such as exposed frame, concealed frame, full glass, point-supported, etc.), balancing aesthetics and practicality.

Clarify energy-saving requirements, and prioritize the use of energy-saving materials such as Low-E glass and insulating glass to reduce energy consumption.

Compliance review

Ensure that the design scheme complies with local building codes (such as fire prevention, lightning protection, and seismic grade) and environmental protection requirements to avoid issues during later acceptance inspection.

II. Material selection and quality control

Glass material

Safety: Tempered glass (with strong impact resistance, shattering into small, obtuse-angled particles) or laminated glass (with a PVB film in the middle layer to prevent debris from splashing) are preferred.

Performance: Depending on the requirements, choose from Low-E glass (for heat insulation), ultra-clear glass (with a low self-shattering rate), insulating glass (for sound and heat insulation), and more.

Specification: Ensure that the glass size and thickness (such as 6mm+12A+6mm insulating glass) meet the design requirements to avoid installation difficulties caused by dimensional deviations.

Frame material

Aluminum alloy profiles must comply with national standards (such as 6063-T5), with a surface oxide film thickness of ≥15μm to prevent corrosion.

Steel materials require anti-corrosion treatment (such as hot-dip galvanizing) to ensure structural stability.

Sealing material

Select weather-resistant silicone sealant (such as Dow Corning or GE brands) to ensure bonding strength and aging resistance.

Avoid direct contact between acidic sealant and alkaline materials (such as concrete) to prevent chemical reactions that may lead to detachment.

Hardware accessories

Connectors, bolts, etc. need to be made of stainless steel to prevent rust from affecting structural safety.

The hinges and locks for the opening fan should be sourced from branded products to ensure smooth operation and anti-theft performance.

III. Construction process management

Surveying and setting out

Use tools such as laser theodolites and level gauges for precise measurement to ensure that the flatness and perpendicularity errors of the curtain wall are ≤2mm.

Re-check the deviation of the main structure, adjust the curtain wall grid size in advance, and avoid deformation caused by forced installation.

Installation of embedded parts

Embedded parts (such as steel plates and anchor bolts) must be constructed simultaneously with the main structure, with a positional deviation of ≤10mm, to ensure the secure connection of the curtain wall joists.

Post-installed embedded parts require pull-out tests to verify whether their bearing capacity meets the design requirements.

Keel installation

The installation of columns and beams requires control of spacing errors to be ≤1.5mm, and diagonal errors to be ≤3mm, to prevent twisting of the curtain wall plane.

The welding area needs to be polished and derusted, and coated with anti-rust paint to prevent corrosion.

Glass installation

For the hidden-frame curtain wall, structural adhesive should be used to fix the glass. The construction environment should have a temperature ranging from 15 to 30℃ and a humidity level of at least 50% to ensure the quality of adhesive curing.

The glass panels should be handled using dedicated suction cups to avoid edge damage; during installation, reserve 2-3mm expansion joints to prevent cracking caused by thermal expansion and contraction.

Sealing and waterproofing

Sealant shall be applied at the junction between the curtain wall perimeter and the main structure, with a width of ≥15mm and a depth of ≥10mm, to form an effective waterproof barrier.

The opening fan needs to be equipped with a drainage hole to prevent leakage caused by rainwater accumulation.

IV. Safety and acceptance

Construction safety

For work at heights, scaffolding or a hanging basket must be erected, and workers must wear safety belts and helmets.

Special tools should be used for handling glass to avoid falling and hurting people; glass cutting should be carried out in designated areas to prevent fragments from splashing.

Quality acceptance

Visual inspection: The curtain wall surface is smooth, free of scratches, with uniform glue joints, and the opening fan is tightly closed.

Performance testing: Conduct tests on air tightness, water tightness, and wind pressure resistance to ensure compliance with design standards.

Concealed works inspection: Inspect concealed parts such as embedded parts, joist connections, and fire partitions to ensure there are no defects.

Post-maintenance

Regularly clean the surface of the curtain wall to prevent dust accumulation from affecting light transmittance; check whether the sealant is cracked and whether the glass is self-exploding.

Establish and maintain records to document each inspection and maintenance, thereby extending the lifespan of the curtain wall.

V. Common problems and prevention

Glass self-explosion

Reasons: nickel and sulfur impurities, edge damage, and thermal stress concentration.

Prevention: Use ultra-clear glass, perform fine processing on the edges of the glass, and avoid sudden changes in local temperature.

Water seepage and leakage

Reasons: aging of sealant, blocked drainage hole, structural deformation.

Prevention: Use high-quality sealant, regularly clean the drainage holes, and control the deformation of the curtain wall.

Structural adhesive failure

Reasons: Improper construction environment, expired adhesive, and incomplete cleaning of the substrate.

Prevention: Strictly control construction conditions, use qualified products, and clean the surface of the substrate.