Heritage 47 Crittall Replacement Aluminium Window

Heritage 47 Evolution Crittall Replacement Window

The Heritage 47 Aluminium Window is designed as a thermally broken replacement for old steel or crittall windows and for use as fixed lights and open out windows. It is an internally beaded tape glazed system suitable for both commercial and domestic applications.

  • Incredibly slim sightlines (sash width of only 42mm)
  • Modern shootbolt locking
  • Internally Beaded as standard
  • Thremally broken frame
  • 47mm frame depth (front to back)
  • Suitable for listed buildings or replica refurbishment projects

Cross Section Through Frame and Sash

SMART Alitherm 300 Externally Beaded Aluminium Window


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

47mm base width profile used as standard.


Internally beaded sash used as standard.


Squareline bead for 24mm units used as standard.


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


32mm add-on is available. This is used as standard where trickle vents are specified.