The COR 80 system is characterized by an exceptionally slim frame. The visible exterior cross-section of only 66 mm significantly increases the glazing area. This allows the glass to constitute up to 85% of the entire window surface, ensuring excellent interior lighting.


The window is designed so that from the outside, fixed glazing cannot be distinguished from operable ones, achieving a perfectly uniform and aesthetically pleasing facade.


A 45 mm thermal break and polyolefin foam in the frame and sash enable a thermal transmittance coefficient of up to 0.8 W/m²K, significantly enhancing energy efficiency.


This system also provides a high level of interior sound insulation, achieved by using glazing up to 50 mm thick.


AEV test results confirm the excellent properties of water tightness, air tightness, and wind load resistance, ensuring the highest level of protection against adverse weather conditions.

  • Exterior cross-section of only 66 mm


  • Glass can constitute up to 85% of the window surface


  • Achieved a uniform and aesthetically pleasing facade with a hidden sash


  • Thermal transmittance coefficient up to 0.8 W/m²K


  • High level of sound insulation with glazing thickness up to 50 mm


  • Excellent water tightness, air tightness, and wind load resistance


  • Protection against adverse weather conditions


  • Capability for hidden handles
Uw up to 0.8 (W/m²K)
Rw = 46 dB
Air permeability: (EN 12207): CLASS 4
Water tightness: (EN 12208): CLASS E1650
Wind load resistance: (EN 12210): CLASS C5
Maximum sash dimensions: L 1300mm, H 2400mm
Maximum sash weight: 160 kg