ALU 70 Hidden Sash - Tilt and Turn Window

The ALU 70 Hidden Sash window offers an ultra contemporary tilt and turn window at a competitive price point.

From outside the unique hidden sash feature makes the window look like a fixed light, with a slim frame and maximum glazing.

Designed for both the domestic and commercial market the Alumen 70 Hidden Sash Tilt and Turn window is suitable for all applications.

  • High thermal insulation capable of achieving an energy rating of 'A'
  • High security multipoint locking fitted as standard
  • Concealed Handle option
  • Concealed Tilt and Turn Gearing
  • Generous size limitations (upto 1300mm x 2400mm)
  • Suitable for both residential and commercial applications
  • Glazing thickness upto 40mm

ALU Hidden Sash

COR 70 Hidden Sash Section

Cross Section

COR 70 Hidden Sash Section


The following profiles are the main profiles that we use as standard. More profile options are available and can be found in the Technical Manual.

Outer Frame

70mm base width profile used as standard.


Concealed Sash. 2 Options available depending upon glazing thickness. Standard 26-32mm, Alternative 34-40mm.




Choice of 85mm Stub cill, 150mm, 190mm or 225mm.


Choice of 50mm and 59mm add-ons. The 50mm add-on is used as standard where trickle vents are specified.