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Cortizo COR 70 HS Aluminium Tilt & Turn Windows

Hidden Sash Aluminium Windows with an Integrated Concealed Handle

Cortizo COR 70 HS Aluminium Tilt & Turn Windows

Hidden Sash Aluminium Windows with an Integrated Concealed Handle

The Cortizo COR 70 HS is a premium aluminium tilt & turn window system designed for contemporary residential and commercial projects where clean architectural lines and high performance are equally important.

Its hidden sash design conceals the opening vent behind the outer frame, creating the appearance of fixed glazing from the outside while maximising the visible glass area. Combined with an integrated concealed handle, the result is a minimalist window with uninterrupted sightlines inside and out.

Suitable for luxury homes, apartment developments and commercial buildings, the COR 70 HS delivers excellent thermal performance, weather resistance and everyday practicality without compromising aesthetics.

Hidden Sash Design with Concealed Handle

The defining feature of the COR 70 HS is its hidden sash construction. By concealing the opening sash behind the outer frame, the window creates a consistent external appearance across fixed and opening lights while allowing larger glazed areas and slimmer visible sightlines.

Internally, the integrated concealed handle sits neatly within the frame, maintaining the clean appearance of the window without projecting hardware.

Together these features provide:

  • Hidden sash appearance
  • Larger glazed areas
  • Slim architectural sightlines
  • Concealed integrated handle
  • Minimalist internal and external aesthetics

Practical Tilt & Turn Functionality

Behind its minimalist appearance, the COR 70 HS provides all the practical advantages of a modern tilt & turn window.

The tilt position allows secure background ventilation, while the turn function opens fully inwards for safe cleaning, simple maintenance and maximum airflow. This makes the system particularly well suited to apartments, multi-storey developments, hotels and premium residential projects where ease of operation is essential.

Design, Performance and Finishing Touches

The COR 70 HS combines concealed engineering with elegant design, creating clean elevations, larger glass areas and refined internal detailing. Browse the gallery below to see how the hidden sash and integrated handle create a seamless appearance across a wide range of residential and commercial projects.

Designed for Contemporary Architecture

The COR 70 HS combines concealed engineering with elegant design, creating clean elevations, larger glass areas and refined internal detailing. Browse the gallery below to see how the hidden sash and integrated handle create a seamless appearance across a wide range of residential and commercial projects.

Technical Specification

Specification COR 70 HS Hidden Sash
Frame Depth 70mm
System Design Hidden Sash
Handle Integrated Concealed Handle
Visible Sightlines 70mm Frame / 70mm Sash
Thermal Performance Uw from 0.85 W/m²K*
Glazing Thickness 26mm – 40mm
Acoustic Performance Up to Rw 46dB
Maximum Sash Size Up to 1300mm (W) × 2400mm (H)**
Maximum Sash Weight 160kg
Air Permeability Class 4
Water Tightness Class E1650
Wind Resistance Class C5
Security PAS24 Certified
Thermal Break 35mm Polyamide
Finishes Single & Dual Colour RAL, Textured, Metallic, Woodgrain & Anodised

* Performance depends on glazing specification, window size and configuration.

** Larger sizes are available on selected configurations using HD hinges.

FAQ

What is a hidden aluminium window?

A hidden window conceals the opening vent behind the outer frame, creating the appearance of fixed glazing while increasing the visible glass area and producing cleaner external elevations.

What are the benefits of tilt & turn windows?

Tilt & turn windows provide secure everyday ventilation through the tilt position while opening fully inwards for easy cleaning, maintenance and maximum airflow.

Are Cortizo COR 70 HS windows energy efficient?

Yes. The system incorporates a polyamide thermal break and supports both double and triple glazing, achieving window U-values from 0.8 W/m²K.

Can the COR 70 HS be specified for commercial projects?

Yes. The system is suitable for residential developments, apartment buildings and commercial applications where slim sightlines, thermal performance and weather resistance are required.

What finish options are available?

The COR 70 HS is available in a wide range of single and dual colour powder-coated finishes, including the full RAL colour range.

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