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.

About BFRC rating

The BFRC is the UKs most widely used rating council for energy performance in windows and doors. The ‘rainbow’ labels are visible proof of invisible performance, showing our product has been independently verified by experts to perform as promised.

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Up to 2 200 mm Max sash height
Up to 1 700 mm Max sash width
48 mm Max infill unit thickness
Up to 180 kg Max sash weight
Uw>=1.4 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
Top hung
Top-hung with fixed light
Top-hung with fixed light
Side hung
Side hung with fixed light
Combination window
Integrated window
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.