English
Home / Projects / Curtain Wall / Marina Tower Façade
Published · Build-up disclosed
A 42-storey mixed-use tower façade assembled from oversize dual-silver Low-E insulating glass units, delivering U≈1.0 W/m²K across a marine temperate climate without breaking the façade grid.
📐 Unitized Curtain Wall
🌡️ U≈1.0 W/m²K
🔥 HST 554°F × 4hrs
📏 IGU 3300 × 12000mm
Marina Tower — 42-storey mixed-use tower (office + residential)
Rotterdam, Netherlands (marine temperate climate)
Unitized stick-and-unitized hybrid curtain wall
~18,500 m² vision + spandrel glazing across 4 elevations
The design called for a near-continuous glass skin with floor-to-ceiling vision bands, a tight U≤1.0 W/m²K target, and a façade grid that had to remain uninterrupted across the tower's long elevations. The challenge was not the coating — it was delivering that coating inside jumbo-format sealed units at a rhythm the unitized system could absorb.
Three constraints defined the specification:
Up to 6,000mm per unitized bay — far beyond standard stock sheet — to reduce mullion breaks along the long elevations.
U≤1.0 W/m²K across the whole façade, including spandrel, to avoid cold-bridge stripes and condensation at slab edges.
Spandrel ceramic frit had to read as the same glass family as the vision IGU under overcast D65 light.
These were the design inputs — final unit dimensions and coating choice were locked at order confirmation and cannot be modified after IGU sealing.
| Layer | Specification | Role |
|---|---|---|
| Outer lite | 6mm clear tempered, dual-silver Low-E on surface #2 | Solar control + low emissivity |
| Cavity | 16mm, Argon 90% | Thermal break |
| Inner lite | 6mm clear tempered | Structure + safety |
| Overall | 28mm (6+16Ar+6) | Standard unitized pocket |
| Spacer | Warm-edge (TSS) | Condensation control at edge |
U/SHGC/VLT are calculated values for this build-up; project-specific climate and orientation may shift the numbers. The spandrel used the same dual-silver coating family with a full ceramic frit on the inner face of the outer lite to preserve colour match.
Cut & edgework (Bystronic ±0.01″)→Temper (Grenzebach, ±9℉)→Low-E coat surface #2→Edge delete 8–10mm→IGU seal (PIB + silicone)→HST 554°F × 4hrs→Crate & ship
The largest sealed IGU measured 3300 × 12000mm. Because this is a sealed insulating unit, the size is constrained by handling and long-term edge-seal integrity — the same jumbo format as a monolithic lite reaches 3300 × 20000mm, but the IGU limit applies here.
Sizing rule: once an IGU is sealed it cannot be cut, drilled or modified. All lite dimensions, coating placement and cavity width were final at order confirmation.
| Standard | Scope |
|---|---|
| EN 12150 | Toughened soda-lime glass |
| EN 1279 | Insulating glass units — moisture & gas durability |
| EN 673 | U-value calculation |
| EN 1096 | Coated glass classification |
Every lite was heat-soak tested at 554°F (290°C) for 4 hours to precipitate nickel sulphide inclusions in the factory, reducing field breakage risk to below 0.01% (batch breakage rate ≤0.08%). Full SGS batch reports and EN 12150 traceability accompanied each crate, with a 20-year breakage insurance cover on the toughened supply.
Unitized modules supplied in sequence with the curtain wall installer's crane schedule — no glass waiting on site.
U≤1.0 W/m²K achieved across all elevations including spandrel, with no visible thermal striping.
Spandrel frit approved under D65 and direct sunlight before mass production — no read-through complaints.
Outcome figures reflect this project's documented delivery. Your project's schedule, U-value and visual result will depend on its own glass schedule and façade system.
At 6,000mm module widths, the alternative was either a dense mullion grid or stick-glazing on a tower crane — both expensive and visually noisy. Jumbo IGU let the unitized fabricator ship near-complete bays: fewer site seals, fewer sightline breaks, and the thermal performance baked in rather than applied as a retrofit.
Note on maximum size: this project used sealed IGUs (3300×12000mm). A monolithic jumbo lite — or a laminated jumbo lite — from the same line reaches 3300×20000mm. The difference is the sealed cavity, not the glass making capability.
3300 × 20000mm (11 × 65.6ft)
3300 × 12000mm
3–25mm monolithic
Bystronic ±0.01″ · Grenzebach ±9℉ · HST 554°F×4hrs
Enterprise capability figures (max 3300×20000mm, ≤0.08% breakage) describe the production envelope, not this specific project's panels. Project dimensions are always confirmed per glass schedule.
Module W × H→U / SHGC / VLT target→Coating grade (single/double/triple Ag)→Cavity width + gas→Spacer (warm-edge)→Inner lite (tempered/laminated)→HST required?→Lock dims & RFQ
EN 12150 · EN 1279 · EN 673 · EN 1096 · CE marking
ASTM C1048 · ASTM E2190 · NFRC 100/200/300
AS/NZS 2208 · AS/NZS 4666
Compliance is project-specific — confirm the target market and building code with the design team before specification.
The largest sealed IGU measured 3300 × 12000mm. Because this is a sealed insulating unit, the size is constrained by handling and long-term edge-seal integrity; the same jumbo format as a monolithic lite reaches 3300 × 20000mm. All unit dimensions were final at order confirmation.
The 6T+16Ar+6T dual-silver Low-E build-up, coating on surface #2, achieved U≈1.0 W/m²K, SHGC 0.31 and VLT 62% — meeting the project's U≤1.0 target for the temperate marine climate.
Yes. All tempered lites were heat-soak tested at 554°F (290°C) for 4 hours to precipitate nickel sulphide inclusions in the factory, reducing field breakage risk to below 0.01%.
EN 12150 (toughened glass), EN 1279 (insulating glass units), EN 673 (U-value calculation) and EN 1096 (coated glass), with CE marking and a project-specific warranty.
Yes. Send your elevation, glass schedule, target U-value/SHGC/VLT, coating grade, unitized module dimensions and destination port. We return feasibility, thermal calculation and FOB quotation within 48 hours.
① Project location & climate · ② System (unitized/stick) · ③ Module W × H & quantity · ④ Build-up (e.g. 6+16Ar+6 Low-E) · ⑤ Coating grade & surface · ⑥ U/SHGC/VLT target · ⑦ Spacer & gas · ⑧ Inner lite (tempered/laminated) · ⑨ HST required · ⑩ Standard (EN/ASTM/AS) · ⑪ Schedule/DWG · ⑫ Incoterm & port
Feasibility review + BIM wind-load & deflection simulation + thermal calc + FOB quote within 48 hours.
📧 tomron1688@gmail.com ｜ 🌐 Upload drawings at jumbotemperedglass.com
Send your elevation and glass schedule — get a matched Low-E IGU specification within 48 hours.Request Specification Back to Projects
The sealed low-emissivity unit behind this build-up.
IGU construction, thermal performance and jumbo sizing for sloped overhead glazing.
Vision, spandrel and unitized system solutions.
← All Projects · Selection Guides · Jumbo Glass · Curtain Wall Glass
Jumbo Glass Group · jumbotemperedglass.com · tomron1688@gmail.com
AS/NZS 2208
AS/NZS 2208
EN 1063:2000
EN 1063:2000
EN 1063:2000
EN 12150-2:2004
Subscribe To Our Newsletter To Get Our Update News!
Copy Right © 2026 Jumbo Glass Group
