ALT W73CW Casement window

Our new ALT W73CW thermally broken window system is designed for the aesthetics and insulation requirements of residential properties. Slim frames and sashes create maximum glazing area to enjoy the daylight. Various hardware options from leading European brands provide opportunities for the fabrication of elegant, warm and safe windows.

ALT W73 CW windows can be glazed from the inside as well as from the outside and also be easily integrated into ALT F50 Facade system and ALT BF73 Bi-folding doors.

down to 2.38 W/(m²·K) depending on the frame/vent combination and the glass thickness Uw = 1.57 W/m²·K for 1.48×1.23 m window dimensions with Ug = 1.1 W/(m²·K) Thermal insulation, Uf (EN ISO 12567-1:2011)
PAS 24:2016 (class W) Burglar resistance
class 4 (600 Pa) Air permeability (EN 1026:2000, EN12207:1999)
side hung - class 8A (450 Pa) top hung - class E1500 (1500 Pa) Water tightness (EN 1027:2000, EN 12208:1999)
side hung - class C5 (2000 Pa; 1/300) top hung - class CE2400 (2400 Pa; 1/300) Wind load resistance (EN 12211:2000, EN 12210:1999)
Fixed light
Framed window
Inegrated window
Tilt-and-turn window (Double sash)
Tilt-and-turn window (Fixed window with a sash)
Tilt-and-turn window (Single sash)
Window wall
Fabrication benefits
  • Easy profile processing due to carefully engineered design.
  • Reliable technological equipment.
  • Different glazing options (from the inside and from the outside).
  • Unique optimized profile design for better thermal insulation (minimum heat loss).
  • Outstanding tightness performance.
  • World leading software.
  • PAS24 (Class W).
  • Advanced security with special glazing fixing clip.
powder coating


  • any RAL-colour according to Qualicoat;
  • exclusive collections (Futura, Precis, Anodic);
  • variety of surface types (glossy, matte, textured);
  • innovative antimicrobial BIO-coating option.


  • conformance to Qualanod standard;
  • 9 standard colours;
  • possibility to choose different surface treatments (chemical etching, bead blasting, brushing).
wood-grain effect


  • conformance to Qualicoat standard;
  • 5 woodgrain options.