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Double Glazing and Home Security

Police statistics have shown that in recent years burglaries in the UK have been on a general downward trend, but now reports in the media indicate that they are increasing again as the effects of the recession start to bite. Those who have experienced having their homes broken into know how very distressing it can be.

For maximum home security and peace of mind, our homes should all be fitted with double glazed locking windows, and exterior doors must also be protected with extra strong locking systems.

Burglar attacking double glazing with crowbar

Burglar attacking double glazing with crowbar

The most common method used by burglars to gain illegal entry to a house, is by violently forcing a window open or breaking the glass. Therefore the security of windows and doors is essential, especially those that pose a greater risk of attack, e.g. on the ground floor at the rear or side of the house, or ones that can be accessed via a flat roof.

Double glazed windows are fitted to most homes nowadays and used not only to insulate houses against cold, winds, and noise, but are also acknowledged as an effective deterrent to burglars by crime prevention advisors and insurance companies.

Double glazing should to be manufactured to BS 7412, which ensures the best possible protection from break in by intruders, wind resistance and weather tightness. The advantages of double glazing are clear!


Why use double glazing for security?

Breaking glass creates lots of noise, which is the last thing a burglar wants.  It also makes it very difficult for a burglar to force the glass out of the frame.

Double glazed window units are available with integrated additional security systems such as multi-locks, double-locking handles, reinforced side hinge security devices and laminated glass.

All of which make double-glazing a very efficient break-in prevention solution.


Double Glazing Locks

  • Multi-point locks – these are basically bolts that are set into the window.
  • Deadlock shoot bolts – are built into the frame on all sides of the double glazing. The lock inserts steel bolts or hooks all around the frame, making the double glazed window or door almost impossible to open from the outside; they are activated by turning the handle to totally lock the window or door.
  • 5 lever deadlocks – available for double glazed doors, and usually required to comply with home insurance


If a double glazed window does not have a locking or bolting mechanism, the level of security is dependent on the type of frame type used.


uPVC Frames

uPVC or plastic frames cannot be forced open from outside, as the plastic makes a tight seal around the glass; also the plastic doesn’t shrink as wooden frames can do.

However, sometimes extra locks cannot be fitted to uPVC windows, as the frames are not sturdy enough to support a metal lock with steel screws. uPVC frames reinforced with galvanized steel and aluminium can overcome this problem.


Aluminium Frames

Aluminium windows are known for their strength and durability and provide an increased level of security, as they are much more difficult for the would be intruder to force.

Hand opening double glazing lock with key

There are many different types of double glazing lock available


Wooden Frames

Wooden frames can be easily fitted with extra locks and bolts. However, wooden frames can shrink away from the glass, making it easier for an intruder to force.


Laminated glass

The panes of glass themselves are characteristically the weakest point in a building, since glass is extremely breakable. If you want to provide added security for those windows particularly at risk, it may be a good idea to fit them with laminated glass.

Laminated glass consists of several glass panes (either standard or individually strengthened), bonded together with a layer of plastic to increase structural reliability and reduce breakability.

Because of its toughness, laminated glass is standard in car windscreens, curtain walls and skylights, but it has also become popular for windows and storm doors in private homes.

It is easy to fit and available in a selection of designs, thicknesses, strengths, and shades, enabling you to custom-glaze windows in your home for maximum protection.

An intruder has no difficulty in smashing a regular pane of glass to gain access to your house, however if your window is made of laminated glass, it will prove to be much harder to break in.

Laminated glass can be made to defend against everything from a crowbar, or a gun to an explosive device and even if the glass does break, it stays in situ on impact and the fragments stay bonded together, thus avoiding injuries from flying glass debris.

The resistance to penetration of the glass can also be sustained by the careful design of the frame and locking system to give the greatest protection.

If you use laminated glass for windows in upstairs rooms, do keep in mind the need for a means of escape, since breaking out through laminated glass is as difficult as breaking in, however this can be allowed for in the design of the frame.

All of the above features and benefits leads us to the conclusion that double glazing is essential as far as security is concerned, for the added protection of your home and valuables!

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