A sliding system with improved thermal insulation parameters due to  the  use of a thermal separator enriched with glass fiber. The profile structure allows the construction of large luxurious doors with single or double glazed sealed units.  The  materials and technical solutions used help  achieve  a high level of thermal and acoustic protection. These doors are perfect for detached houses as well as apartments that require open spaces.


A window and door system with increased thermal insulation, equipped with a thermal barrier. It is characterized by high thermal and acoustic insulation, waterproofness and resistance to wind load. This system meets all the requirements for energy saving and environmental protection – its parameters exceed the requirements of the strictest applicable regulations and standards.

Application and functionality

  • Fixed or inward opening windows: Turn-Only, Tilt&Turn, Tilt&Slide
  • single or double leaf doors, opening outwards or inwards
  • optional bending of profiles and installation of arched windows
  • windows and doors with anti-burglary hardware
  • optional dual colored structures: the profiles can feature different colors on the interior and exterior
  • optional use of closure sensors – reed switches
  • installed separately or in aluminum facades


  • 3-chamber sections with a depth of 3.54 inch (window and door frame, door leaf), 3.89 inch (window sash)
  • 1.77 inch wide thermal barrier made of innovative materials
  • new standard for the profile and glass overlap – increased depth significantly improves the thermal and structural properties of the system
  • additional thermal insulation inserts (optional)


  • sash width: 66.92 inch
  • sash height 110.23 inch
  • sash weight 440 lb


  • filling thickness between 0.82 inch and 3.22 inch for opening windows and 0.47 inch – 2.87 inch for fixed doors and windows
air permeability class 4, EN 12207
watertightness class 9A, EN 12208
thermal insulation Uf from 0,73 W/(m²K), Uw od 0,7 W/(m²K)
wind load resistance up to class C4, EN 12210


With OKNOPLAST, embellishing your interior requires attention to the smallest details. Of course, color, material, and shape of the aluminium window are all important when choosing, but let’s not forget the accessories.


A variety of more than 50 colors in any combination of your choice are available for both indoors and outdoors. High-performance multi-layer film that is weather and UV-resistant retains its gloss throughout its life.

Get a personal consultation.

For all questions, problems, and suggestions find an OKNOPLAST expert near you and ask for a quote.