ALT W62HS Hidden sash window

ALT W62HS hidden sash windows meet the highest architectural requirements with thermal insulation and the greatest possible transparency (the glazing area of W62HS windows is 18% larger than those of ALT W62 classic window).

The installation of ALT W62HS windows allows you to improve the local lightening of the premises, make it visually spacious and more comfortable.

The ALT W62HS windows with maximum thermal insulation and hidden sash are well combined with ALUTECH Door systems as well as with Sliding and Curtain Wall systems.

Hidden sash windows make a building look stylish and allow more sunlight to enter the premises thanks to the larger glazing area.

Up to 2 500 mm Max sash height
Up to 1 600 mm Max sash width
54 mm Max infill unit thickness
Up to 150 kg Max sash weight
1,3 W/m2*K Thermal insulation, Uw (EN ISO 12567-1:2011)
PAS 24:2016 (class W) Burglar resistance
class 4 (600 Pa) Air permeability (EN 1026:2000, EN12207:1999)
class E1500 (1500 Pa) Water tightness (EN 1027:2000, EN 12208:1999)
class B5 (2000 Pa; 1/200) Wind load resistance (EN 12211:2000, EN 12210:1999)
up to 36 dB Acoustic insulation (EN ISO 10140-2:2011, EN ISO 10140-4:2011)
Fixed light
Сombination window
Integrated window
Parallel-sliding 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 and timesaving fabrication due to universal punch-tools and equipment.
  • Universal corner cleats for stock optimization.
  • Simple and easy profile processing.
  • Easy integration into ALT F50 curtain wall system.
  • Replacement of most window elements does not require dismantling the entire structure.
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.