
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 concealed. In this way, any element that could disrupt the visual harmony of the whole is removed.
70 mm aluminium hinged system with concealed sash
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 construction simplicity.
- Thermal transmittance
- Uw ≥ 0.84 W/m²K
- Acoustic insulation
- Rw up to 46 dB
- Air permeability
- Class 4
- Water tightness
- Class E1800
- Wind resistance
- Class C5
- PAS24 security test
- Suitable
System technical information
Main data
- Sections
- Frame 70 mm · Sash 70 mm
- Polyamide strip length
- 35 mm
- Profile thickness
- Window 1.9 mm
- Glazing
- Max. 40 mm · Min. 26 mm
- Max. sash dimensions
- Standard solution: width 1300 mm · height 2400 mm · HD hardware for side-hung opening: width 1200 mm · height 3500 mm
- Max. sash weight
- 160 kg
- Note
- Check maximum weight and dimensions according to typology
Options
Opening options

System gallery
Images prepared to show the concealed-sash design, the system sections, its opening options and its integration into residential projects.




Compare this system with what you need to improve
Before choosing a window, it helps to relate the system to the real use of the home: thermal insulation, outside noise, air leakage, watertightness, orientation and opening type.
Connect this system with your project
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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.



