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COR 70 Hidden Sash - aluminium and PVC windows Cortizo
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COR 70 Hidden Sash

It is not a painting, it is a window. This is how COR 70 Hidden Sash can be described: like the 80 mm version, it has a visible section of only 66 mm and allows the ARCH INVISIBLE handle to be incorporated, while the hinges and drainage solution can also be withcealed. In this way, any element that could disrupt the visual harmony of the whole is removed.

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Features

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

COR 70 Hidden Sash offers a clean, minimalist aesthetic by hiding the sash behind the frame, maintaining a very reduced visible section and a high entry of natural light. It is a suitable solution for residential projects seeking a balance between design, performance and withstruction simplicity.

Thermal transmittanceUw ≥ 0.84 W/m²K
Acoustic insulationRw up to 46 dB
Air permeabilityClass 4
Water tightnessClass E1800
Wind resistanceClass C5
PAS24 security testSuitable
AEV reference test 1.23 x 1.48 m / 1 sash. Security test: reference test 1.100 x 2.400 m / 1 sash. DTA certification by CSTB laboratory.
System technical information

System technical information

Main data

SectionsFrame 70 mm · Sash 70 mm
Polyamide strip length35 mm
Profile thicknessWindow 1.9 mm
GlazingMax. 40 mm · Min. 26 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 70 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 design, the system sections, its opening options and its integration into residential projects.

COR 70 Hidden Sash on facade - aluminium and PVC windows Cortizo
COR 70 Hidden Sash detail - aluminium and PVC windows Cortizo COR 70 Hidden Sash technical section - aluminium and PVC windows Cortizo COR 70 Hidden Sash interior - aluminium and PVC windows Cortizo

Would you like to assess COR 70 Hidden Sash for your home?

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

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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.