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COR 80 Hidden Sash - aluminium and PVC windows Cortizo
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COR 80 Hidden Sash

Elegant straight-line design in which the sash is withcealed behind the frame, maximising the glazed surface and the entry of light. This is combined with high thermal and acoustic performance driven by a 45 mm thermal break and a glazing capacity of up to 51 mm, allowing the installation of triple glazing.

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Features

80 mm aluminium hinged system with withcealed sash | Cortizo aluminium and PVC windows for homes

COR 80 Hidden Sash combines minimalist aesthetics with high insulation performance. The sash is hidden behind the frame to reduce the visible section, increase natural daylight and offer a very clean solution for demanding residential projects.

Thermal transmittanceUw ≥ 0.71 W/m²K
Acoustic insulationRw up to 46 dB
Air permeabilityClass 4
Water tightnessClass E1650
Wind resistanceClass C5
AEV reference test 1.23 x 1.48 m / 2 sashes.
System technical information

System technical information

Main data

SectionsFrame 80 mm · Sash 80 mm
Polyamide strip length45 mm
Profile thicknessWindow 1.9 mm
GlazingMax. 51 mm · Min. 36 mm
Max. sash dimensionsStandard solution: width 1300 mm · height 2400 mm · HD hardware for side-hung opening: width 1200 mm · height 3500 mm
Max. sash weight160 kg
NoteCheck maximum weight and dimensions according to typology

Options

Security hardware - aluminium and PVC windows CortizoSecurity hardware
Concealed hardware - aluminium and PVC windows CortizoConcealed hardware
Concealed handle - aluminium and PVC windows CortizoConcealed handle
Concealed drainage - aluminium and PVC windows CortizoConcealed drainage

Opening options

COR 80 Hidden Sash opening options - aluminium and PVC windows Cortizo
Inward opening: side-hung, tilt & turn, bottom-hung and parallel sliding.
System gallery

System gallery

Images prepared to show the withcealed-sash aesthetics, the system sections, its opening options and its integration into residential projects.

COR 80 Hidden Sash in a home - aluminium and PVC windows Cortizo
COR 80 Hidden Sash detail - aluminium and PVC windows Cortizo COR 80 Hidden Sash section - aluminium and PVC windows Cortizo COR 80 Hidden Sash technical section - aluminium and PVC windows Cortizo

Would you like to assess COR 80 Hidden Sash for your home?

Request a quote and we will help you analyse whether this system meets your needs for insulation, natural daylight and minimalist design.

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Aluminium and PVC windows: useful guidance for choosing well

Choosing aluminium and PVC windows is not only a matter of price. In every home, orientation, climate, outside noise, opening size, façade design and daily use all influence the final decision. Cortizo Windows brings together solutions designed to improve thermal insulation, acoustic insulation, security, natural light and energy efficiency while preserving the character of each project.

Aluminium stands out for its strength, durability, dimensional stability and design possibilities, especially when large openings, slim profiles or highly customised finishes are required. PVC offers excellent insulating performance, low maintenance and a strong balance between comfort and value for home renovation. In both cases, the right choice should take into account the glazing, opening type, installation quality, orientation and the real needs of the household.

Beyond comparing materials, it is useful to define what needs to be improved: reducing energy loss, gaining more silence, increasing security, simplifying maintenance, renewing the appearance of the home or preparing it for more efficient consumption. The Cortizo Windows retail network helps assess each project, identify the most suitable solution and request a professional quotation for replacing windows with a close, project-focused service, without spam or unrelated calls.