Alumil M4

M4 is a thermal insulated system for structural curtain walls with hanging frames (stick type) for faster installation, which includes the following characteristics:

  • 55 mm width of mullions
  • Vents with structural glazing
  • Distance between glass panels: 14 mm
  • Vents are supported by the mullions, which secure the frame on the curtain wall structure.
  • Vents can be either fixed or projected outwards
  • Vast variety of mullions for high wind loads 
  • Polygonal surfaces are possible
  • Combines with any kind of door from the M11000 system
  • Very easy installation on the building



Exterior visible width

14 mm

Interior visible width 

55 mm

Mullion depth

49 - 139 mm

Transom depth

47 - 154 mm


Stick type with pre-assembled frame glass and EPDM gaskets

Glass thickness

5 – 38 mm

Mullions max inertia

Ix=501  Iy=64 cm4

Transoms max inertia

Ix=68  Iy=36 cm4

Inserts Max inertia

Ix=125  Iy=32 cm4

Cross section thickness



Type of system



from 3,7 W/m2K

Exterior aesthetics


Types of vent

·Top hung window

·POW window

·Inwards hinged window





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