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Window designs: large selection of various designs of window

Window designs

Windows can be divided into a number of design categories. However, there is no standard uniform separation of the different types of windows available. As windows have several distinctive characteristics and properties, they can also be attributed to several different categoies of window designs. However, windows are frequently divided into types of design as follows:

  • Location/purpose
  • Type of opening mechanism
  • Material
  • Window elements

These separations are the simplest, being assigned by the particular location in which they are used. However, this division does not tell us anything about the installation,appearance or safety aspects of the window. The most important window designs are:

  • External windows
  • Door windows
  • Skylights
  • Internal windows
  • Cellar/basement windows
  • Bathroom windows
  • Shaft windows

Opening systems

Many windows are categorised according to the way in which they are designed to open. This is why many are divided into so-called window types. The following list provides the main window types:

  • Fixed glazing
  • Turning windows
  • Tilt windows
  • Turn and tilt windows
  • Pivoted windows
  • Pivot sash windows
  • Sliding windows
  • Exit windows


Another way of differentiating between window designs is by their material. This simple way of categorising materials is based purely on the window profile, i.e. the window frame material used. Four main designs are categorised:

  • Wood windows
  • PVC windows
  • Aluminium windows
  • Wood-Aluminium windows

Single windows

The single window is the most popular design of window used in Europe. This window desgn comprises a single sash frame profile. Within this profile or frame construction various types of glazing can be fitted. The window frame is securely fixed within the wall construction. The window casement is fitted with appropriate hinges and fittings and the selected type of glazing. The frame material can be produced from a range of different raw materials: wood, PVC or aluminium. The first single construction windows were fitted with single-glazing. These panes of glass could not contribute very much in the way of insulation and were very poor as both heat or sound insulators. For this reason this particular type of window is no longer permissible for heated rooms within the Federal Republic of Germany. Today's single unit windows are equipped with multi-pane insulation glazing. The window itsef comprises a minimum of two panes of glass. Between the two (or more) panes there is a gap which provides an inner chamber. This separation chamber is either filled with air or a gas. Within the range of insulation glass there are several different types, each possessing different properties. One finds sun-protection glass, thermal insulating glass or sound-proofing glass. Multi-pane insulation glass - as a result of modern multi-pane technology - provides excellent insulation properties.


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The separation of windows according to their elements is the clearest. The categorisation of the particular window design is decided according to the window elements used. That allows us to draw up the following window designs:

Double window

Double windows are used when the window opening is closed using two separate single windows. Both single window units are placed one behind the other, so that one window is placed inside and the other is situated outside.

The windows are then opened separately from each other, one is opened inwards and the other outwards. The double window presents better thermal and sound insulation than a simple single window, but they are rarely used nowadays thanks to more modern window designs. Double windows can also be split into two separate groups: box double windows and coupled windows. The latter separation of window designs is that used most frequently. It gives a more accurate picture of the window elements employed.

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