The COR80 Hidden Sash is a premium aluminum window system by Cortizo that masterfully conceals the sash behind the frame, maximizing glazed surface area and natural light entry while maintaining a sleek, straight-line aesthetic. Engineered with a 45 mm thermal break and glazing capacity up to 51 mm — accommodating triple glazing — it achieves a thermal transmittance as low as Uw ≥ 0.71 W/m²K and acoustic insulation up to Rw 46 dB. Backed by Class 4 air permeability, Class 1650 water tightness, and Class C5 wind resistance, the COR80 Hidden Sash delivers elite environmental performance with a near-frameless visual presence.
Performance Ratings
- ● Thermal Transmittance: Uw ≥ 0.71 W/m²K
- ● Acoustic Insulation: Rw up to 46 dB
- ● Air Permeability: Class 4
- ● Water Tightness: Class 1650
- ● Wind Resistance: Class C5
Profile Specs
- ● Frame Section: 80 mm
- ● Sash Section: 80 mm
- ● Polyamide Bar Length: 45 mm
- ● Profile Thickness: 1.9 mm
- ● Max Glazing Thickness: 51 mm
- ● Min Glazing Thickness: 36 mm
Opening Options
- ● Side-Hung — Inward opening, classic casement style
- ● Turn & Tilt — Ventilation + full inward open functionality
- ● Bottom-Hung (Hopper) — Controlled top-inward ventilation
- ● Parallel Sliding — Space-efficient horizontal operation
Hardware Options
- ● Security Hardware — Optional
- ● Concealed Hinge — Optional
- ● Concealed Handle — Optional
- ● Concealed Drainage — Optional
Maximum Dimensions Per Sash
| Configuration | Max Width | Max Height |
|---|---|---|
| Standard Solution | 1,300 mm | 2,400 mm |
| HD Hardware (Side-Hung) | 1,200 mm | 3,500 mm |
| Maximum Sash Weight | 160 kg — subject to configuration | |
CORTIZO — Authorized Cortizo dealer — European-engineered aluminum systems.
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