Casement windows are often the most recommended window type for enhanced security.

Before looking at how to enhance your window’s security, you’ll need to check whether it is  PAS 24 certified. This British accreditation shows if a window or door has met its comprehensive security standards to endure break-in methods. All new residential buildings must now adhere to the PAS (Product Assessment Specification) requirements or an equivalent standard. However, many windows in old properties are not certified to PAS 24:2022 (the latest specification), so it’s crucial to replace them if needed.

In terms of style, most windows can offer good security if they have strong build quality and are well-maintained, but casement windows are often the most recommended. This window type is considered more secure as the tight sealant and multi-point locking systems make it difficult for intruders to pry them open.

Sliding windows can be less resistant to break-ins because they have weaker locks and sliding panels — burglars can more easily manipulate and remove them than other window mechanisms. Additionally, louvre windows that have horizontal slats like a window blind, are generally not advised due to the lack of security.

The material can also influence a window’s security level, with aluminium frames often being recommended due to their robust properties. Another commonly used material, uPVC is long-lasting and hard-wearing, making the frame highly resistant to forced entry. Timber frames, however, are more vulnerable as they require additional maintenance to protect them from rotting and weathering, which weakens the material.

It’s also worth noting that any windows with large glass panels can be less secure, but only if the glass is weak and easily broken.

Double glazing or security window film enhances a window's strength.

Burglars often target homes with single-glazed windows as the glass is much easier to break. While most new homes are built with double glazing, many old properties still contain the weaker alternative.

However, old double glazing is still susceptible to break-ins and requires updating. While modern double glazing uses internal beading to keep the glass in place, old models used external beading, which could be tampered with to remove the glass panes and access the property. Now, double glazing is highly secure against breakage, mainly if it includes a layer of laminated or toughened glass to further increase the window’s strength.

Not all windows, such as heritage properties, are suitable for double glazing, though. An alternative is window film, which provides many of the benefits of double glazing but at a fraction of the price and with a much simpler installation process. Security window film acts as a protective layer, strengthening the glass and holding it in place if attacked. It’s advised to use film to increase the security of breakable single-layered and untreated annealed glass.

Security window film is also a good option for renters who don’t want to invest in a property they don’t own and have no control over the structural improvements.

Grilles and bars can be added to windows to prevent them from being smashed, but as they can block the view from the inside and impact the room’s aesthetics, they may be best suited to rooms not regularly used.

Overall, film or permanent glazing is recommended over temporary secondary glazing that intruders could easily remove.

3) Keep valuables out of sight

Computers and other valuables left on display by windows can attract burglars.

In the Aviva study, one in ten people said they stored their keys within reaching distance of a door or window. Even if the keys are out of reach but still visible, burglars can use fishing rods and coat hangers to hook the keys through a small gap.

It’s also important to keep valuable items, like tech, jewellery, and wallets concealed to avoid attracting burglars. If keeping belongings near windows is unavoidable and you don’t want to keep your curtains or blinds closed, installing a one-way window film will keep your items hidden without blocking your outside view. 

4) Upgrade window locks and security devices

A window latch is a standard lock found on double and single-hung windows.

Different window styles often require specific locks to match the mechanisms and materials, such as folding locks for casement windows and track locks for sliding windows. However, most insurance companies require all ground-floor external locks to meet a certain security standard, such as the BS 7950 specification for enhanced security of casements and tilt/turn windows. It’s important to check your home insurance policy specifications.

According to the Metropolitan Police, key-operated locks are recommended for windows that open out, are easily accessible and are on the ground floor. In the guidelines for minimum security for domestic property, the Master Locksmiths Association advised fitting a multi-point locking system or two locks with removable keys for windows that open and are over 600 millimetres (mm) high or wide. Handle locks are also recommended for accessible windows.

While the ground floor windows are most at risk of burglars accessing and therefore need robust locks, it’s still important to lock upstairs windows, especially if they’re not easy for neighbours to view. However, in a John Lewis study, nearly 70% of respondents said they didn’t bother locking their upstairs windows, and nearly one-third slept with their bedroom window open in the summer months.

Unfortunately, burglars can take advantage of this access using ladders that are in the garden or they bring themselves. Upstairs windows near a drain pipe, shed, or anything else a burglar can climb are particularly easy targets. To mitigate burglary risks, shut and lock all windows whenever you’re not home, even if you’re in the garden.

Installing window restrictors can also help protect the home against burglaries, as they limit how far a window can open, preventing intruders from climbing through.
Some window restrictors are integrated and concealed in the window design, while others are retrofitted to existing windows. If the restrictors come with a lock and key, ensure the keys are safely stored away. These measures allow you to let fresh air flow through the home without anyone gaining access through windows.

Fitting sash jammers is also a cheap and easy way to stop uPVC windows from opening completely if a burglar bypasses the lock. Hinge bolts are another added precaution to prevent windows from being lifted off their hinges and forced open. Similarly, anti-lift devices can keep sliding windows from being lifted out of the track.

Keep in mind that these security measures are not a substitute for window locks but instead provide additional protection. Windows that don’t need opening or act as a fire escape can be permanently screwed shut to prohibit any accessibility.

5) Home security systems

The visibility of a security alarm can help deter burglars.

In the Aviva study, only a fifth of Brits said they used a burglar alarm while they were away from their property for an extended period (such as three days or longer), and just 17% used it while they slept. Another startling figure was that only 20% used traditional security measures, such as motion sensor lights that activate at night.

However, a home security system is key to protecting your entire property, including the windows. The visibility of an alarm or camera will help deter burglars, as well as alert you to any security threats. It’s also recommended to install cameras so all entry points are recorded, especially if they’re away from public view. Anything that draws attention to an intruder, like floodlights, is another useful way to prevent break-ins.

Motion sensors can also trigger an alarm if it detects somebody is in the home or visible through the window if the device is positioned properly. Due to this measure, burglars may target upstairs windows as sensors are commonly only used downstairs, so it’s important to use them in all rooms when you aren’t home and the rooms you aren’t using while asleep.

If possible, keep these security systems out of reach and inaccessible so burglars can’t easily tamper with them.

6) Window maintenance

Maintaining the quality of windows can prevent security risks.

Even the most protective window will lose its effectiveness without proper maintenance. So, after investing in your window’s security, don’t let it degrade over time, leaving your home vulnerable.

To maintain window frames, clean them every few months, depending on your environment and the material, with a soft cloth and warm, soapy water. Harsh chemicals are generally best to avoid unless they’re specifically designed for the material.

Inspect the coating of timber frames annually and, if needed, sand and re-coat the wood. Ensure you re-paint or re-stain damaged timber, which may require a timber filler to smoothen the surface. Any rotting will likely need a professional assessment.

Window mechanisms are generally low-maintenance but will occasionally benefit from upkeep. First, polish the hardware using a soft cloth and spray a small amount of silicone-based lubricant.

As well as conducting regular maintenance, ensure all window elements have been properly fitted, whether you’ve had recent updates or moved homes, otherwise, the security could be compromised.

While many are anxious about the possibility of burglaries, it seems this worry may be putting people off from thinking about it altogether. However, taking measures to protect your home is the best way to regain control and lessen the risk. As windows are a common entry point for intruders, it’s vital to maximise their security.

Easily Increase Your Window Security with Window Films

One of the easiest ways to increase the window security in your home and keep your family safe is by installing specialised security window films. They offer much higher levels of protection against break-ins and are an extremely cost-effective solution compared to other security solutions.

Get in touch with Evowrap for more information about how security window film can help prevent break-ins and keep your home safe.