How Secure Are Double-Glazed Windows?

The world we live in is one full of dangers and unsavoury characters. Our usual place of solace and protection is our homes, but sometimes even they can come in for unwanted attention. Fortunately there are options available to you that add that extra security.

So let's look at what goes into a secure window, and what you should be looking at when you make the decision to replace your current windows.

Saving Energy

It's worth mentioning here that most people's primary reason for changing their windows is to save money. Yes, they want to be safer, but not if it increases their heating bills. Most replacement windows nowadays are "A" rated, and it doesn't really make sense to buy a window that isn't. But not all "A" rated windows are equal; it's worth ensuring that you're buying 70mm units - the price difference is negligible, and you'll quickly recoup the difference in energy savings.

Reinforcement

PVCu is a fantastic material - it's stable, durable and virtually maintenance-free. But ultimately it's just plastic. The best windows are steel-reinforced as standard (make sure this is standard, not an extra cost option). This reinforcement should run through all four sides of the frame. Check this carefully - it's a favourite price-cutting move among some manufacturers.

Internal or External Beading

You may have heard people talking about internal and external beading, but what's the difference and why should you be concerned about it?

When double glazing is added to the frame, this is locked into place into the window frame using either internal or external glazing beads. The downside of external beading is that it can be removed from outside simply by prising it loose. It's then possible to lift the glass pane out of the frame and gain entry. This isn't possible with internal beading. The advice here is clear and simple: don't even consider externally beaded windows.

Locking Systems

Window security has improved considerably over the last few years, but it's still worth checking. Look for high-security locks (and remember not to leave the keys in them!), and ask to see samples of the door furniture. Satisfy yourself that the handle and locking system are sturdily made.

Now turn your attention to the way the moving element is secured to the frame. You should see multiple locking points that fit into solid sockets. All of these should be fixed firmly to the internal steel reinforcement, not the PVCu. The hinges should be immune to lifting, and ideally there should be anti-jemmy bolts.

The best replacement windows will include these features as standard, and they're completely adequate to resist all but the most committed attack.

Secured by Design

A top-quality manufacturer will build all of the features above into their range of windows. But in some cases, for example where a window is particularly vulnerable - say because it's concealed from view and in a high-crime area, it may be worthwhile going even further.

The UK police have given their backing to the Secured by Design initiative. Backed by the Prime Minister, the DETR and Local Government, Secured by Design supports the principles of designing out crime. Secured by Design (SBD) covers the locking mechanisms for doors and windows and these are tested to destruction in a laboratory setting. To pass the stringent SBD criteria, they also have to pass British Standards BS7950 and PAS 24.

Among other things, adding the SBD standard to a window means the addition of secure claw locks. These are made from reinforced galvanised steel and run up the hinge side of the window. They locate at the bottom, middle and top of the window and once the window is closed it means that the window is now locked and secure on all four sides increasing security and making it virtually impenetrable.

Sometimes going that extra mile makes all the difference. The Secured by Design standard should make little difference to the overall cost of your new window project, especially as it's usually required only on the most vulnerable windows. And you can't ever put a price on the safety of your family.

The marketplace for replacement windows, doors and conservatories contains too much self-promotion, thinly disguised as buying information. In this series of articles I'm putting together information from Elitis, who manufacture replacement windows in Stoke on Trent. Together we're hoping to bring you the answers - or at least the best questions - to consider when making an informed choice.

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