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Awning windows

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Awning windows

Awning windows are hinged at the top - making them useful in wet weather.

What are awning windows?

An awning window is hinged at or near the top of the frame and swings out from the bottom to open. The design of awning windows makes it ideal for ventilation in wet weather with the sash acting as a canopy to keep the rain out. You can also control the amount of air coming in by adjusting the angle of the window.

 

Window operation

Push-out awnings are fitted with friction stays to allow manual ‘push out’ operation. A lever is fitted to the middle of the bottom rail to close the sash tightly against the frame. For added security, optional multi-point levers will lock the window in place.

An alternative system of sash support uses hinges or non-friction stays and is operated by a flexible chain arm or scissor system with a handle-operated winder at the middle of the bottom rail. This overcomes the problem of sashes on friction stays in exposed location closing due to the wind pressure. Folding handles are also available to keep curtains and blinds clear of obstruction.

 

Window ventilation

While most awning windows won’t allow you to open the entire window, it is easy to regulate ventilation - even when it is raining.

 

Are awning windows energy efficient?

An awning window, when compared with a sliding window, performs favourably in terms of increased energy efficiency. They leak less air because when the sash presses against the frame to close, it provides an airtight seal. This compression type sealing, adds to the insulation properties of your home.

 

Weatherproofing

Weather tightness is usually excellent with awning windows if fitted with a continuous seal around the sash (or frame). Wind pressure helps to seal the sash against the frame and prevent water penetration.

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Maintenance tips

Awning windows have a number of moving parts such as cranks, hinges, and levers which may need repairing, though most can be replaced without much trouble. Unless the top part of the sash slides down, the outer pane will need to be cleaned from the outside.

 

Window security and insect screens

Screens can only be added to the inside of the window with winders operating underneath or through the screen. For manual push out awning windows, magnetic or retractable insect screens are available.

 

Common awning window problems

Awning windows project beyond the face of the building so it is unwise to use this style of window in locations where external space is tight.

 

Tip 
  • Before getting these windows installed, be sure to measure the amount of outside clearance the window will have.
Advantages
  • Ideal for wet weather
  • Good thermal performance
  • Good weather-sealing properties
  • Can add automation
Disadvantages
  • Limited security and fly screen installation
  • Unsuitable if external space is tight
  • Unsuitable in high wind areas if using friction stays
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