NORTH Collection DK Windows2016-10-27T20:02:55+00:00



Glass Sliding Doors

Fixed Windows

DK Windows

Glazed Doors

Panelled Doors


Our DK windows are popular because they are safe, secure, and easy to use. They can be locked, tilted inward for ventilation, and opened to the side with the same handle.


Our DK windows are popular because they are safe, secure, and easy to use. They can be locked, tilted inward for ventilation, and opened to the side with the same handle.

In ventilation position, the window tilts inwards from the top and stays slightly open, creating a pleasant flow of fresh air. When you want to ventilate the room, you do not have to remove things from under the window or from the windowsill. And, thanks to its design, the window keeps rain out even when tilted for ventilation.

For easy cleaning, these windows can be opened inward to the side. Because there is only one frame, there are just two glass surfaces to clean. When closed, the window is locked securely with a multi-point locking mechanism.

DK windows are safe to use because they tilt inward from the top when opened for ventilation. They can be used as reliable fire exits because they can be opened quickly with a simple turn of the handle and there are no window restrictors or other mechanisms that would make opening the window slow and difficult.

Our DK windows are also suitable for use as French balcony doors, for instance. The single-framed window swings open in the same way as a door and has the added benefit that it can be tilted and left in ventilation position. This kind of ‘door’ is safe for children and pets even when it is left slightly open.

Number of Frames1
Opening DirectionInward
HingesSide and bottom hinges with a tilt function or hinged without a tilt function
Casing DepthDouble and triple glazing: 78 mm
MaterialPine, larch, or oak
LatticesOptionally, a decorative lattice fitted to the inside or outside of the inner pane
Color Options for Aluminium PartsMatte brass, matte silver, and matte bronze
HandleHandle from the Hoppe New York range.

Please ask about the availability of other handles.

Finish Options for the HandleMatte silver or matte brass.

Locking handle available in matte silver or matte brass.

Optional FeaturesAvailable with vents – the vent colour option is white.


The name of float glass refers to its manufacturing process: the molten glass is floated onto a bed of molten tin and onto a cooling kiln. The manufacturing process enables excellent optical quality in the result. The most common float glass thicknesses are 4, 6, 8, and 10 mm.
Tempered glass is physically and thermally strong, and it has excellent flexural strength. It is around 4–5 times stronger and more heat-resistant than non-treated glass. When tempered glass breaks, it shatters into small, dull pieces instead of sharp shards. Most types of glass can be tempered, except soft-coated glass and carved decorative glass.
Laminated glass consists of two or more sheets of glass with inter-layer bonding, typically of polyvinyl butyral. When laminated glass breaks, the inter-layer structures hold the pieces of glass together, preventing injuries caused by falling or flying glass. Various types of glass, including energy-saving, sun-protection, and soundproof glass, are available laminated.
Safety glass is designed to prevent injuries from falling or flying glass. There are two types of safety glass, tempered and laminated glass, with individual subtypes of glass falling into personal safety classes F1–F3. Some types of safety glass can also have other features, such as energy-saving properties, protection against the sun, soundproofing, or self-cleaning properties.Safety glass can be used to protect people or property against vandalism, break-ins, or firearms. Resistance categories:
  • Anti-vandalism P1A–P4A
  • Protection against burglary P5A–P8B
  • Bullet protection BR1–BR7
The safety feature can be combined with other features, such as energy-saving properties (selectivity), protection from the sun, soundproofing, or self-cleaning characteristics.
Sun-protection glass reduces the amount of solar radiation that passes through the glass unit. The thermal radiation and visible light from the sun is partly reflected and partly absorbed, with only some of the radiation passing through the glass. Sun-protection glass can also be tempered, or it might have features such as soundproofing. The pane with the sun-protection coating is always the outermost pane of a glass unit. The special coating on energy-saving sun-protection glass scratches easily, so it always faces the inside of the unit.
Self-cleaning glass has been treated with a transparent photocatalytic and hydrophilic coating. The principle of self-cleaning glass involves two natural components: sunlight and rainwater. The sun’s UV radiation (present even when it is cloudy) breaks down dirt and grime, making it easier to remove. Rain then washes the dirt away. Unlike with normal glass, water does not leave unsightly marks on self-cleaning glass when it dries; instead, it forms an even layer over the entire surface of the glass. Self-cleaning glass is, therefore, cleaner after the rain than normal glass is. Self-cleaning glass can also have other features, such as energy-saving or sun-protection properties, or it might be tempered.
Tempered silk-screen or back-painted glass is an excellent choice for portions of façades that do not have windows. The colours for back-painted glass are chosen from the RAL colour chart. Decorative patterns are created to order, by means of the screen-printing technique.
Most of our insulated units feature Super Spacer warm edge spacers. The Super Spacer component is made of silicone foam without any metal parts, and it is a significant improvement over traditional metal spacers. It conducts 950 times less heat than aluminium spacers do and has been shown to reduce the pressure on the panes, decrease the passing of heat through the unit, prevent condensation, increase the surface temperature of the panes, and improve soundproofing. The Super Spacer product has undergone extensive testing, and it is widely used all over the worldInsulated glass units with Super Spacer warm edge spacers have the market’s best U values. Super Spacer spacers enable window- and door-manufacturers to meet tightening energy-efficiency requirements.In addition, spacers made of aluminium or stainless steel are still available. Metal spacers can be used when the spacers have to be a certain colour or the glass unit must meet the requirements of a specific fire-resistance class.
The soundproofing characteristics of a glass unit can be improved through the use of panes with different thicknesses, by means of laminated glass, or with an increase in the amount of space between the panes. The best results are achieved with laminated glass that has a special soundproofing coating. Soundproofing glass can also have other features, such as energy-saving or sun-protection properties, or it can be self-cleaning or tempered, for example.
Window handle

Window handle

New York

Standard handles. We use Hoppe handles in our windows and doors. Our standard handles are from the Hoppe New York range and are available for all of our windows and doors. Other handles are available on request.


Five-year warranty against structural, technical, and material defects

A five-year warranty applies to products coated, painted, or varnished at our production facility.

One-year warranty against structural, technical, and material defects (from the date of delivery)

The warranty applies to all untreated and stained products that are painted or varnished properly immediately after installation.

Five-year warranty against leaks and condensation

The manufacturer of the insulated glass units offers a five-year warranty on all of these units. Leaking or condensation-prone units will be replaced at any point during the term of warranty.



Venetian blinds can be fitted to the windows at the factory.

The standard colour is white (0150).
Silver (7010) is available as a special colour.

Color options
  • White

  • Silver


Our DK Windows can be equipped with easily attachable insect screen, which is long lasting, stylish and almost unnoticeable.

Colour of the net is always grey due to transparency. Colour options for the frame are:

  • RAL 9010 white
  • RR 32 brown
  • RAL 1001 beige
  • RAL 7024 dark grey
  • RAL 7040 light grey

Special colours also available.