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The best window alarms for your garage

• Added protection for your garage
• Cover security weak spots
• Deter thieves

Written by Alex Boyd Published: 16 May 2023 Updated: 4 September 2023

When it comes to car and garage security, we try to make sure our property is protected as well as it can be, but there is one often overlooked part of the garage that could give any would-be intruders a chance – the garage window. It gives a clear view of the goodies inside your garage and, let’s face it, doesn’t take too much effort to break which is why a window alarm is such a clever purchase.

In recent years, the development of security systems has begun to look at how windows and glazing can be protected effectively. There are now some reasonably inexpensive and easy-to-fit solutions available. The two main types of alarms are vibration or glass break sensors and contact sensors.

Vibration alarms are generally attached directly to the glass and will sound an alert when any vibrations are detected. Contact alarms come in two parts; one is a magnet, and the other is the alarm. One part is installed on the window part, and the other on the window surround. When the window is opened, the magnet’s contact with the sensor breaks, and either a notification is sent to your smartphone, or an alarm can sound, depending on how it has been set up. You can start protecting your windows from under a tenner, so there’s no need to worry about spending too much. Here are some of our top picks.

The best window alarm at a glance:

Editor’s Choice: Two Pack SECRUI Wireless Window Alarm Buy now from Amazon UK

Best multi-pack window alarm: GE Personal Security, Window and Door Alarm Buy now from Amazon UK

Best smart window alarm: SWANN SWIFI-WDOORPK2-GL Door & Window Sensor – Buy now from Currys

The best window alarm in detail

Editor’s choice

The Secrui wireless alarm is a quick and easy way to get added protection for your windows. The unit is powered by 2xAAA batteries, and you don’t need any tools to fit it as the magnetic strip, and alarm are attached to the window and frame by adhesive pads. When the window is opened and the magnetic strip is moved away, the 120dB siren will sound for one minute.

It’s quite flexible as it has different operating modes and can be used on doors as well, and the batteries shouldn’t need to be replaced for about six months.

Pros

  • Quick and easy to fit
  • Loud siren

Cons

  • No low battery warning light

Best vibration sensor window alarm

Price: £15.59
The Doberman Window Alarm actually sits on the glass to detect any vibrations and has the added bonus of being an effective visible deterrent, too. Should anyone attempt to break the window or open the frame, the vibration sensor will set off the 100dB siren, which should be enough to deter most intruders. The sensor has been tuned to recognise weather-related vibrations to avoid false alarms.

There’s no complicated set-up procedure, just a simple on/off switch and the power is provided by three LR44 coin cell batteries.

Pros

  • Detects vibrations before the window is broken
  • Inexpensive

Cons

  • Some may not like its appearance in the window

Best multi-pack window alarm

Price: £48.12
You may think a pack of twelve alarms is a bit over the top, but when you consider that means they are less than a fiver each, that’s great value. Use a couple in the garage on the windows and doors, and you’ve still got plenty of spares to use around the house or pass on to others.

The GE Personal Security two-part system is easily installed using adhesive pads, and the 110dB alarm should be enough to scare anyone off. The battery test button and the low battery indicator will let you know when to replace the four LR44 coin batteries.

Pros

  • Battery status indicator
  • Small size

Cons

  • The quality of the adhesive pads could be better

Best smart window alarm

The Swann Door and Window sensor works by sending alerts to your smartphone or tablet. The physical installation is pretty easy – you simply attach it using the supplied adhesive strips. The procedure to pair the alarm with your smartphone or tablet can take a few minutes, and you will need to download the Swann security app, but it gives you full alarm monitoring and control.

The alarm is made of durable materials and is weatherproof, meaning it can withstand the elements and should last for years, and it’s compatible with other Swann systems.

Pros

  • Remote monitoring and control
  • Long battery life

Cons

  • No audible alarm

Best value window alarm

This pack contains two Defender Window Alert Vibration Alarms and is another inexpensive and easy way to improve your garage security. The alarm operates via a simple on/off switch with two sensitivity settings and will emit a 110dB siren when any vibrations are detected. It’s easily affixed to the window glass with an adhesive pad and a red warning sticker can be put on the outward-facing side of the alarm as an additional visual deterrent.

Power comes from 2xAAA batteries which are included and should last for up to six months.

Pros

  • Adjustable sensitivity
  • Good value

Cons

  • Perhaps not the best-looking solution

The best window alarms: FAQs

Q. What are the different types of window alarms?
A. There are two basic types of alarm, the vibration detection alarm and the magnetic strip alarm. Motion sensor alarms can be used, too, but these are of more value as room alarms.

Q. What features should I look for?
A. Ideally, you should go for an alarm with a loud siren to deter intruders, a tamper-resistant design that will make it difficult for burglars to disable the alarm, a battery status indication to prevent batteries running flat, and a remote control for arming and disarming can be handy too.

Q. Are window alarms easy to install?
A. Yes, generally, no tools are required as they can be fixed to surfaces using adhesive pads.

Q. Do window alarms need to be maintained?
A. Most will only need to be cleaned and have the battery changed. Other than that, they should run quite happily by themselves.

Q. What are the benefits of having a window alarm?
A. There are a number of benefits, principally deterring burglars, but it will increase your home security which should give you additional peace of mind.

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Alex Boyd is a Commercial Content Writer at Bauer Media writing for Parker’s and CAR and loves travel, gardening, DIY and music.