The Schüco Corona CT 70 window system pairs proven German engineering with aesthetic versatility. Where many rivals offer just one look, this system lets you select the sash geometry: the understated Classic, the bold Cava, or the gently rounded Rondo.
With its sturdy steel reinforcement and a distinctive gasket layout, windows built on this profile deliver outstanding structural rigidity and a tight seal. It is the perfect pick for anyone seeking not merely a "plastic window," but an architectural element built to last for decades.
Brand
Schüco is the choice of architects who don't compromise. The German corporation is famous for aluminum facade systems that adorn skyscrapers worldwide. For private clients, Schüco offers the same technologies in premium window and sliding system formats.
More about SchücoTechnical Specifications
A German reference point. A top-tier system offering interchangeable sash profiles (Classic, Cava, Rondo) and improved stiffness.
Core system specifications:
Glass and infill choices:
Profile geometry and sizing:
Tested performance values:
A German reference point. A top-tier system offering interchangeable sash profiles (Classic, Cava, Rondo) and improved stiffness.
For a standard 2-sash tilt-and-turn window (1200 × 1400 mm) with basic double-glazed unit.
Alternative solutions from other manufacturers
Side by side
How Schüco Corona CT 70 stacks up against the closest matches from other brands.
| Specification | Schüco Corona CT 70This profile | Rehau Euro-design 70 | Veka Softline 70 | WDS 6S (70 mm) |
|---|---|---|---|---|
| Brand | Schüco | REHAU | VEKA | WDS |
| Material | PVC | PVC | PVC | PVC |
| Profile depth | 70mm | 70mm | 70mm | 70mm |
| Chambers | 5 chambers | 5 chambers | 5 chambers | 6 chambers |
| Glass unit, max | up to 52mm | up to 40mm | up to 42mm | up to 40mm |
| Thermal (Uw) | 1.3 | 1.3 | 1.3 | 1.3 |
| Sound (Rw, dB) | ≈48 Rw(dB) | ≈43 Rw(dB) | ≈45 Rw(dB) | ≈40 Rw(dB) |
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FAQs
This is a 70 mm, 5-chamber PVC profile with a frame value of Uf 1.3 W/m²K (standard reinforcement) reaching Uw ≤ 1.3 W/(m²·K). Sealing relies on a pair of EPDM weatherseal lines, and a rust-resistant steel core keeps wide sashes stable. The combined frame-plus-sash height is a standard 120 mm.
Depending on the glazing bead chosen, it accepts infills up to 52 mm — enough room for unusually thick low-energy or acoustic units. That headroom is what enables the Rw up to 48 dB (sound protection class 5) rating with appropriate glazing. Build-ups that exceed 52 mm simply will not seat under the bead.
The CT 70 is a casement window system, not a heavy lift-and-slide or door. Its security tops out at RC2 (formerly WK2), so it isn't the choice where higher burglar-resistance classes are specified. For large sliding openings or entrance doors, Schüco's dedicated LivIngSlide or LivIng Door systems are intended instead.
It is rated Class 4 air permeability (DIN EN 12207) and Class 9A watertightness (DIN EN 12208) — the latter being the top class on that standard's scale. Combined with the twin EPDM seal lines, this makes it well suited to exposed, weather-driven facades.
It is the entry premium PVC casement. For better warmth, the 7-chamber LivIng 82 (82 mm, Uw ≤ 0.80) steps up while sharing the 52 mm glazing limit. Aluminium siblings differ in build:
You choose from three sash outlines — Classic (traditional), Rondo (rounded), and Cava (with undercut) — so the window suits any facade. The EPDM gasket is supplied silver-grey on white profiles and black on laminated ones for a refined, coordinated finish.
