Keystone Supplies, Unit 17 Storforth Lane Trading Estate, Hasland, Chesterfield, Derbyshire, United Kingdom S41 0QQ
01246 201523
Cortizo Aluminium Windows
Precision engineered Spanish aluminium windows designed for high specification architectural projects. Featuring ultra slim profiles, superior thermal insulation, and expansive glass areas, Cortizo window systems seamlessly blend minimalist modern aesthetics with outstanding energy efficiency.
The Cortizo COR 70 Hidden Sash system is engineered for modern architectural projects where clean lines and expansive glazed expanses take priority. By concealing the operable window sash directly behind the slim outer frame, the system ensures that fixed lights and opening windows present a completely uniform external appearance. With an extraordinarily slender 66mm visible face width, it maximizes natural daylight while creating a frameless, minimalist look from the outside.
Manufactured with high grade architectural aluminium and advanced 35mm tubular polyamide thermal break technology, the COR 70 Hidden Sash achieves exceptional thermal insulation and weather resistance. Ideal for contemporary self builds, luxury extensions, and major renovations, each unit is custom fabricated to provide outstanding acoustic performance, robust security, and smooth daily operation.
External Finish
Architectural Powder Coated Aluminium, Anodised, or Textured
Internal Finish
Matching Powder Coated Aluminium or Dual Colour Options
Glazing Options
High performance double or triple glazing up to 40mm thickness
Optional Extras
Fully concealed hinges, solar control glass, acoustic laminated glass, minimalist architectural handles
Opening Styles
Inward tilt and turn, inward side hung, outward top hung, fixed
Colours
Complete range of Classic RAL colours, textured finishes, and bespoke dual colour combinations
Security
Multi point locking mechanisms, PAS 24 security compliant, internal glazing beading
Thermal & Acoustic
U values as low as 0.8 W/m²K with acoustic insulation reaching up to 46dB
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Cor 70 Casement
High Performance Architectural Aluminium Windows
The Cortizo COR 70 Casement window system combines architectural strength, sleek profile geometry, and market leading energy efficiency. Engineered to suit both contemporary modern homes and traditional property renovations, the system offers complete design flexibility. Whether configured as classic side hung casements, top hung sashes, tilt and turn units, or grand multi section bay windows, the COR 70 delivers crisp sightlines that maximize glass area and flood interior spaces with natural daylight.
At the core of the system is a precision engineered 35mm tubular polyamide thermal break, combined with high performance EPDM gaskets to eliminate draughts and prevent heat loss. This robust aluminium profile delivers exceptional weather tightness against driving rain and heavy wind loads, alongside superior acoustic insulation. Fully compatible with high security multi point locking hardware, the Cortizo COR 70 provides dependable safety, structural longevity, and effortless daily operation.
External Finish
Architectural Polyester Powder Coating, Anodised or Textured
Internal Finish
Matching Powder Coated Aluminium or Bespoke Dual Colour Options
Glazing Options
High performance double or triple glazing up to 55mm unit thickness
Side hung, top hung projecting, inward tilt and turn, fixed frame, floating mullion French casement
Colours
Comprehensive palette of Classic RAL colours, textured architectural finishes, and dual colour combinations
Glazing Options
Multi point perimeter locking, PAS 24 security certified, internal security glazing beading
Glazing Options
U values down to 0.8 W/m²K with acoustic noise reduction up to 45dB
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Ultra Slim Sightlines & Concealed Frames
Cortizo COR 70 Hidden Aluminium Sash
66mm Ultra Slim Visible Profile
Multi Point Security & PAS 24 Certified
U Values Down To 0.8W/m²K
Concealed Sash Aluminium System
Engineered to maximize natural daylight, the Cortizo COR 70 Hidden Sash system conceals the window sash directly behind the outer frame. This creates an uninterrupted, all glass exterior appearance with an extraordinarily slim 66mm visible profile, delivering sleek minimalist aesthetics alongside exceptional weather protection and thermal efficiency.
Exceptional Thermal Performance & Security
Cortizo COR 70 Aluminium Casement
70mm Frame Depth & Slim Sightlines
Secured By Design & PAS 24 Certified
U Values Down To 0.8W/m²K
Advanced Polyamide Thermal Break
Delivering superior energy efficiency and structural strength, Cortizo casement and hinged window systems are ideal for contemporary modern homes and premium renovations. Built with advanced thermal break technology, these highly versatile windows can be tailored into side hung, top hung, or tilt and turn configurations to suit any space.
Stay Stylish With Matching Doors
Looking For Cortizo Doors?
See Cortizo's paired range of doors to perfectly complement your windows.
