Aluminium windows opening types


Windows are a key part to any house or building. The main functions of windows are letting natural daylight, providing ventilation and connection to outside. In addition to these classical functions, the windows have to meet aesthetic, energy efficiency, acoustical and security requirements. So choosing the right windows is depending on many factors when you are building a new home or renovate an older home. Since opening type can change most of these functions of windows, it is important to select the right opening type when considering windows for your building project.  So you should consider the type of window opening that best suits you.

Opening type of a window specifies how the window opens.

There are so many different opening types for windows. When the windows are classified according to the opening types: 

  • Inward opening side-hung window
  • Inward opening turn&tilt window
  • Inward opening bottom-hung (tilt only) window
  • Outward opening side-hung window
  • Outward opening top-hung window
  • Sliding window
  • Folding window
  • Pivot opening 
  • Fixed window

The casement opening is the most popular opening type comprising of a traditionally opening framed window. It is economical and widely used with a basic and uncomplicated design and a straightforward opening style. Although casement windows are often referred to as side-hinged windows, the opening casements can be side-hung, bottom-hung or top-hung on hinges attached to the window frame.

Inward opening side-hung window

That is the traditional side-hung casement window and it is the most requested window type. The window sash is attached to the frame by one or more hinges. By operating the handle, the window sash can be opened for inward turning. It is easy to clean this window from the inside and it offers a very good means of escape.

Inward opening - Turn&tilt window

Turn and tilt windows have dual hinge system and two different vent opening settings: tilt and turn opening. When the window vent is in the “tilt” mode the top of the vent opens slightly inward for a secure ventilation; and when in the “turn” mode the vent swings open fully like a side hinged window.

A tilt and turn window has restricted opening of typically 15 degrees. This allows for adequate ventilation, making them ideal for offices, businesses, hotels and flats. The safety and cleaning options make this style of window increasingly popular and they are incorporated in many newly built flats. 

Inward opening - Tilt before turn window

It is the same as a turn&tilt window style except handle positions. Depending on how the handle is positioned, this window can first be tilted and in the second position the window can be turned. That opening also called “tilt before turn” window.

Inward opening - Bottom-hung (tilt only) window

This element is equipped with either a handle or a spring latch. By operating the handle or spring latch, the window sash will move to a tilt position.

Outward opening - Side-hung window

That is the another traditional and popular window type in the UK. It is side hinged and the handle is located at the centre on the window.

Outward opening - Top-hung window

The window sash can only open up to a limited angle and it can be cleaned only from the outside. Because the sash opens outward, it has no sash in the room that disturbing sill ornaments, curtains or blinds.

Horizontal sliding window

A sliding can be slid open using one or more railings.

Folding window

Folding window sashes can be folded open in a specific opening sequence. A folding window system creates the ultimate opening area.  In this system, the glazed elements are folded to the in -or outside of a wall by use of a rail.

Vertical pivot opening 

The pivot sash is secured to the window frame by a pivot mechanism. The mechanism is located vertically at or near the center of the window. Pivot windows allow a wider opening than is common with other window types. The design of a pivot window also allows for larger than standard window sizes.

Horizontal pivot opening

Having one sash only, the horizontal pivoted sash hinged swings open vertically. Typical applications for horizontal pivot windows are large sized openings in commercial or residential buildings where the design calls for an unobstructed view and large window sizes.

Fixed window

As the name suggests, fixed glazed windows are fixed and don’t have any sash. Since they are not openable and don’t provide any ventilation, fixed windows can be used in situations where only light or vision is needed.