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8+16Ar+8 Low-E curtain wall glass – heavy-duty double silver low-emissivity insulated glass unit engineered for high-rise towers, super-tall buildings, and blast-rated facades. 8mm tempered outer lite + 16mm argon cavity + 8mm tempered inner lite. Double or triple silver Low-E coating on #2 or #3 surface. U-value ~1.4 W/m²K (double silver) to ~1.2 W/m²K (triple silver), SHGC 0.18–0.33, VLT 45–60%. Jumbo size up to 8330×13000mm. ASTM E3190, EN 1679, IGCC certified. Request FOB quote.
8+16Ar+8 Low‑E Curtain Wall Glass | Heavy‑Duty Low‑E Insulated Glass for High‑Rise & Super‑Tall Towers
Heavy‑Duty Double Silver Low‑E Insulated Glass – The Preferred Configuration for High‑Rise, Super‑Tall Towers & Extreme Wind Load Facades
8+16Ar+8 Low‑E curtain wall glass is the heavy‑duty counterpart to the industry‑standard 6+16Ar+6 configuration. It consists of:
💡 Why 8+16Ar+8 is specified: When building height exceeds 250m, wind loads typically surpass 2.5 kPa — exceeding the safe working range of 6mm glass. The 8mm panes in this configuration provide the necessary stiffness to limit center‑of‑glass deflection to L/175 (typical curtain wall limit), while the 16mm argon cavity maintains the same thermal performance as the 6mm standard. For super‑tall towers, this configuration is considered the minimum specification.
| Item | Specification |
|---|---|
| Configuration | 8+16Ar+8 |
| Overall Thickness | 32mm |
| Outer Lite | 8mm Tempered / Heat‑Strengthened |
| Inner Lite | 8mm Tempered / Heat‑Strengthened |
| Coating | Double Silver or Triple Silver Soft‑Coat Low‑E (MSVD) |
| Coating Surface | #2 (cold climate) or #3 (hot climate) |
| Cavity | 16mm sealed |
| Gas Fill | Argon ≥90% (Krypton optional) |
| Spacer | Warm Edge TPE / Swisspacer / Stainless Steel |
| Seal | Dual seal: PIB primary + Polysulfide/Silicone secondary |
| Desiccant | Molecular sieve ≥2800 mg/g |
| Parameter | Double Silver (Balanced) | Triple Silver (Balanced) | Triple Silver (Ultra‑Low SHGC) |
|---|---|---|---|
| U‑Value | ~1.4 W/m²K | ~1.2 W/m²K | ~1.2 W/m²K |
| SHGC | 0.28–0.33 | 0.20–0.25 | 0.15–0.19 |
| VLT | 50–60% | 50–58% | 41–50% |
| g‑value | 0.28–0.33 | 0.20–0.25 | 0.15–0.19 |
| UV Blockage | 90–95% | >98% | >98% |
| Acoustic (Rw) | ~35 dB | ~35 dB | ~35 dB |
| Max Size | 3320 × 10200 mm | 4320 × 9800 mm | 4310 × 9500 mm |
The 8mm glass thickness provides approximately 77% greater bending stiffness compared to 6mm glass (stiffness ∝ t³). This translates to:
| Glass Thickness | Relative Stiffness | Safe Wind Load (4‑side support, 1800mm span) |
|---|---|---|
| 6mm | 1.0x | Up to 2.5 kPa |
| 8mm | 2.37x | Up to 4.0 kPa |
| 10mm | 4.63x | Up to 6.0 kPa For buildings above 250m, wind loads of 3.0–4.0 kPa are common — 8mm glass is the minimum recommended thickness. |
Despite the thicker glass, the 16mm argon cavity with double silver Low‑E achieves a U‑value of ~1.4 W/m²K — identical to the 6+16Ar+6 configuration. With triple silver Low‑E, the U‑value drops to ~1.2 W/m²K, approaching Passive House performance levels for double glazing.
Triple silver Low‑E in the 8+16Ar+8 configuration can achieve SHGC as low as 0.15 — essential for super‑tall towers in tropical climates (Dubai, Singapore, Miami) where cooling loads dominate.
The 8mm glass mass provides ~35 dB Rw — a 2 dB improvement over 6+16Ar+6. This is critical for high‑rise residential towers, hotels, and office buildings in noisy urban environments.
The thicker glass provides inherent impact resistance. Combined with SGP lamination (available on one or both panes), 8+16Ar+8 can meet GSA blast standards (Level B/C) and hurricane impact codes (Miami‑Dade, TAS 201, 202, 203).
Our jumbo IGU capability extends 8+16Ar+8 to 3320 × 10300 mm — enabling fewer facade joints and cleaner architectural lines for landmark towers.
8+16Ar+8 double silver Low‑E is the recommended vision glass specification for high‑rise towers. The 8mm glass provides structural confidence at height, while the Low‑E coating delivers energy performance.
Recommended specification:
For spandrel zones, the same 8+16Ar+8 Low‑E IGU is used with ceramic frit applied to the inner surface of the outer lite. The thicker glass provides additional thermal mass and stability for the frit application.
Spandrel specification additions:
✅ Best practice: Using the same 8+16Ar+8 Low‑E IGU for both vision and spandrel zones ensures consistent U‑value, SHGC, and facade appearance. Only the frit differs.
Our jumbo production capability allows 8+16Ar+8 Low‑E IGU to be manufactured in sizes far exceeding industry standards.
| Parameter | Standard | Jumbo |
|---|---|---|
| Max Width | ≤2400 mm | ≤3320 mm |
| Max Height | ≤6000 mm | ≤10300 mm (extreme up to 15500 mm) |
| Max Area | ~14 m² | ~34 m² |
| Glass Thickness | 8mm | 8mm (both lites) |
| Wind Load Capacity | Up to 3.0 kPa | Up to 5.0 kPa (with proper frame design) |
| Coating Variant | Gas | Price Range (USD/m²) |
|---|---|---|
| Double Silver (balanced) | Argon | $36–52 |
| Double Silver (solar control) | Argon | $38–54 |
| Triple Silver (balanced) | Argon | $46–64 |
| Triple Silver (ultra‑low SHGC) | Argon | $48–68 |
| Triple Silver (balanced) | Krypton | $54–74 |
| Triple Silver (ultra‑low SHGC) | Krypton | $58–80 |
| Factor | Impact |
|---|---|
| Coating variant | Triple silver +15–25% vs. double silver |
| Gas fill | Krypton +15–25% vs. argon |
| Spacer type | Warm‑edge +5–10% vs. aluminum |
| Tempering | Included in base price |
| Laminating (one or both panes) | +$20–50/m² |
| Ceramic frit (spandrel) | +$8–15/m² |
| Quantity | FCL pricing available |
| Destination port | Affects logistics cost |
💡 Comparison with 6+16Ar+6: 8+16Ar+8 is typically 20–35% more expensive than 6+16Ar+6 due to the thicker glass, heavier processing, and increased logistics cost. The premium is justified by the structural and acoustic benefits for high‑rise applications.
Submit your project requirements for a competitive FOB quotation and performance analysis.
Required Information:
Q1: What is 8+16Ar+8 Low‑E curtain wall glass?
It is a heavy‑duty double‑glazed insulating glass unit with 8mm tempered outer and inner panes, a 16mm argon‑filled cavity, and a double or triple silver soft‑coat Low‑E coating. It is the standard specification for high‑rise and super‑tall towers.
Q2: When should I specify 8+16Ar+8 instead of 6+16Ar+6?
When building height exceeds 250m, wind loads exceed 2.5 kPa, glass spans exceed 1800mm, acoustic targets exceed Rw 34 dB, or blast resistance is required.
Q3: What U‑value does 8+16Ar+8 achieve?
Double silver: ~1.4 W/m²K. Triple silver: ~1.2 W/m²K. With krypton fill: ~1.0 W/m²K.
Q4: What SHGC can I expect?
Double silver (balanced): 0.28–0.33. Triple silver (balanced): 0.20–0.25. Triple silver (ultra‑low): 0.15–0.19.
Q5: Which surface should the coating be on?
Q6: Can 8+16Ar+8 be used for spandrel glass?
Yes. Add ceramic frit to the outer lite for opacity. The same IGU construction maintains consistent thermal performance.
Q7: What is the maximum size?
Up to 3320 × 10600 mm for standard 8mm panes. Larger sizes require engineering review.
Q8: What certifications do you provide?
ASTM E3490, EN 2469‑5, IGCC, CE, ISO 2481, CCC, SGS. Blast testing per GSA and BS EN 17123 available on request.
Q9: What is the lead time?
Standard sizes: 5–7 weeks. Jumbo sizes: 7–9 weeks. Laminated panes add 1–2 weeks.
Q10: How does 8+16Ar+8 compare to 6+16Ar+6?
8+16Ar+8 provides 2.37x greater bending stiffness, ~2 dB better acoustic performance, and higher wind load capacity — at a 20–35% cost premium. For buildings over 250m, 8+16Ar+8 is the recommended minimum.
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