Glass Curtain Wall Systems
The modern skyline language. Hanart engineers and delivers aluminum-framed glass curtain walls — unitized and stick-built — floor-to-ceiling transparency with engineered thermal, acoustic and fire performance.
Two proven construction methods
Unitized Glass Curtain Wall
Factory-assembled and glazed modules crane-lifted into place. The choice for towers above 50 m where speed, quality control and weather-tightness decide the program.
- Module 1.2–2.4 m × 3.2–4.2 m
- 2–3 panels installed per crane per day
- Factory glazing QC and pressure testing
- Watertightness Class R7–R8
Stick-Built Glass Curtain Wall
Site-assembled mullions, transoms and infill glass. The lowest-cost conventional system for mid-rise buildings with flexible response to irregular geometry.
- Mullions & transoms 60–180 mm sightline
- Thermal-break frame profiles
- Glass 6–19 mm insulating units
- Ideal ≤ 60 m building height
Glass curtain wall performance envelope
Indicative values from Hanart-verified assemblies; final values confirmed per project by full-scale mock-up testing.
| Parameter | Standard | Premium |
|---|---|---|
| U-value | 1.4–1.6 W/m²·K | 1.0–1.2 W/m²·K (triple to 0.9) |
| SHGC | 0.30–0.45 | 0.18–0.30 |
| Visible light transmittance | 50–65% | 35–55% |
| Watertightness | Class R6 | Class R7–R8 |
| Airtightness | Class A2 | Class A3 |
| Wind load resistance | ≥ 2.4 kPa | ≥ 3.5 kPa (hurricane-rated) |
| Acoustic insulation | Rw 35–38 dB | Rw 42–46 dB |
| Fire rating (option) | — | EI 60 / EI 120 perimeter |
Balanced facade engineering
A curtain wall is an engineering compromise — daylight, thermal performance, solar control, acoustic comfort, structural safety and cost must be balanced together. Hanart runs the full calculation set on every project: thermal, condensation, structural, seismic, fire and water management.
- Thermal & condensation risk analysis (ISO 10211)
- Structural design for wind, seismic and thermal movement
- Solar control glass specification per facade orientation
- Acoustic design to interior noise targets
- Fire, smoke management and perimeter barriers
Glass curtain wall questions, answered
A curtain wall is a non-structural facade hung on the building's edge, spanning from slab to slab and carrying only its own weight plus wind load. A window wall sits on the slab, transferring its weight to the floor structure. Curtain walls allow floor-to-ceiling glass and are the standard for commercial towers.
With thermal-break frames and high-performance coated insulating glass, Hanart glass curtain walls achieve U-values from 1.2 W/m²·K (double glazing) down to 0.9 W/m²·K (triple glazing in cold climates), validated by full-scale mock-up testing.
Yes. Hanart supplies fire-resistant glass curtain walls using fire-rated glazing (up to EI 60/120), fire-stopping at floor edges, and perimeter fire barriers, engineered and tested to the project's local fire code.
From award to facade completion: 8–14 months for a typical 10,000–50,000 m² tower, including engineering (2–3 months), mock-up testing (1–2 months), fabrication (3–6 months) and erection (3–6 months). We provide a detailed program on review of your drawings.
Every project follows a full QA program: design reviews, full-scale mock-up testing (air, water, structural, thermal), factory QC with serial-numbered panels, site installation supervision, and performance testing on the completed building before handover.
Engineer a glass curtain wall for your tower
Send your drawings and performance targets. We'll recommend the system (unitized or stick-built), glass specification and preliminary budget within 24 hours.