what is a home alarm system garage door

What Is A Home Alarm System Garage Door?

Protecting ourselves and our home is vital. Although we can lock our windows and doors at night, it is the garage door that many intruders may quickly get in. 

You can easily keep this from occurring by utilising the best garage door alarm. With a wide variety of choices, there’s one that will undoubtedly suit your needs. 

To help you narrow down your choices, we listed the seven best garage door alarms so you can pick what’s best for you. Door sensors are an essential component of your home security system: they let you know when someone enters your home. 

These devices are made up of two parts, which form a circuit when they’re kept parallel. 

When someone opens the door, the two parts separate and break the course, triggering the control panel to sound an alarm.

Because door sensors are simple to install, it’s easy to take these helpful gadgets for granted. But the more you know how your home security system works, the better you can use and maintain them.

Why Garage Door Security Is Important

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Of all of your outside doors, your garage door is probably one of the most at risk when it comes to security.  Garage door openers usually feature an emergency release lever. This lever has a cord that hangs down. 

All you have to do is pull the line, and the door opens. Anyone with a clothes’ hanger can reach into your garage and pull the cord. 

Once thieves break into your garage, it is usually pretty easy to gain access to the inside of the home.

A home security alarm can significantly increase your garage security. Add outdoor cameras to the exterior of the garage, and you have a very secure access point.

The Inner Workings Of A Door Sensor

While there are several different types and styles of door alarm sensors, most use a reed switch and a magnet to determine when a door is open or closed.

Reed switches are used in countless devices, from doorbells to laptops, and rely on a set of electrical connectors. 

The button is closed when the two parts sit close to one another, and an electric current can flow. 

When the switch opens, the two parts separate, causing the electrical current to stop and the circuit to deactivate.

When you add a door sensor into your home security system, the device will come with both pieces: a reed switch and a magnet. 

One piece attaches to the door frame, and the other attaches parallel to the first piece on the door itself. 

The two parts create a closed circuit when the door is shut. As the door opens, the magnet and switch separate, breaking the course. When the circuit fails, the sensor signals the central control panel.

Installing Door Sensors

Door sensors are easy to install. Using a strong adhesive, attach one piece of the sensor onto the door and the other to the frame. The two pieces must sit directly next to each other with only a tiny amount of space between them. 

If they’re too far away or aren’t parallel to one another, the pieces can’t interact, and the reed switch and magnet won’t create a circuit.

Garage Door Sensors

Though not as common as regular door sensors, garage door sensors can bring a lot to a home security system. There are two ways to detect a garage door opening: with a standard door sensor or with a pitch sensor.

The standard sensor works the same as on any other door. The two pieces are installed next to each other, one on the door and one on the wall next to the door. When the garage door is raised, it breaks the circuit and sets off the alarm.

A pitch sensor is a bit different. Rather than working through two pieces, pitch sensors are standalone devices. 

They’re designed to detect changes in angle. When the garage door is closed, the sensor sits vertically; when the door is opened, the sensor will move up with the door, and that change in angle will set off the sensor to trigger the alarm.

Door Sensor Use And Maintenance

Depending on the security system, you may customise the type of alert you receive when a door opens. 

You may choose for an audible alarm to sound when a door opens. Or, you may prefer the notice to trigger silently while alerting your security company and notifying you of a possible breach.

No door sensor lasts forever. The sensor may become damaged, the switch may wear out, and wireless sensors eventually run out of batteries. 

If a door sensor is setting off false alarms or malfunctioning, make sure to call your home security company to replace it immediately.

Now that you know the inner workings of door alarm sensors, it’s time to shop around and find one that meets your home security needs.

Garage Door Alarm Sensors

Garage door sensors are special alarm sensors that are designed for use with garage doors. 

Monitoring your garage is very important, as it is one of the most vulnerable spaces inside a home. With these devices, you can protect your garage and your property. 

A garage is one of the most common locations for the occurrence of property theft inside a house. 

An unclosed garage door is an open invitation for any criminal to walk right up and take your valuables. 

Additionally, garages serve as an easy access point for intruders to step inside the home. From there, they can easily steal valuables and cause damage. With this in mind, forgetting to close a garage door can have severe consequences.

One of the easiest ways to check if your garage door is closed is with a garage door sensor. 

These devices will essentially allow your garage door to show up as a zone on your security panel. 

If the sensor is activated due to the garage door being opened, the information will be displayed on the system. 

This will allow you to know if your garage door has been opened unexpectedly immediately. 

This can be great if you live in a household where multiple people have access to the garage door, and you want to know if someone has arrived home quickly.

Garage door sensors typically work in one of two ways. These are tilt sensors and door contacts. 

Tilt sensors consist of a single device that is placed on a garage door. When the garage door is opened, the tilt sensor will shift from a vertical position to a horizontal position. 

This change in orientation will allow the sensor to detect whenever the garage door is activated. 

When this occurs, the sensor will pass a signal onto the security system to let it know that the garage door has been opened. You can then respond appropriately.

The other prominent type of garage door sensor is a door contact. These devices consist of a sensor and a magnet. 

The sensor is usually installed on the garage door frame, and the interest is installed on the garage door itself. 

When the garage door opens, the magnet will separate from the sensor. This will cause the reed switch inside the sensor to activate. 

When this happens, the sensor will signal the security system and cause a fault in the affected zone. One look at the security panel will inform you that the garage door was opened.

Best Garage Door Security Tips

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You’ve heard of home security systems, but have you heard of garage security systems? Okay, that’s not a thing. 

Still, your garage is just as worthy of protection as your house is. Let’s talk about how you can keep your garage and everything in it safe.

Close Your Garage Door

Do you shut your garage door? Or do you sometimes leave it open while you’re napping or running errands? 

Leaving your garage door open may not seem like a big deal at first, but at second look, it’s a huge security problem.

An open garage door makes it easier for thieves to steal your cars, bikes, and power tools. And, if your garage is attached to your house, it becomes a huge safety risk. 

It’s practically inviting people to try their luck with the door connecting your home to your garage. Pretty scary if you ask us.

To keep your garage and home safe, close your garage door when you aren’t around to monitor it.

Smarten Your Garage Up

It’s easier to protect a smart garage than a “dumb” one. Responsive technology that you can access remotely makes it easier to control garage access.

Smart Opener

A quick way to make your garage more secure? Use a smart garage door opener.

When you use a smart garage door opener, you can control the door from your phone. That means you can open and close the garage remotely. 

That’s super useful if you forgot to shut it when you left the house or needed to let your kid in to grab their bike.

Even if you don’t want to invest in a smart door opener, you might be able to put your everyday garage door remote on a timer. 

The timer causes the door to close after a set amount of time.

If you aren’t sure whether your opener has this feature, check with the manufacturer.

Smart Sensors

If you add sensors, you’ll know anytime someone else opens or closes the garage. You can even receive an alarm through your phone when there’s unauthorised activity.

Some home security systems offer special tilt sensors. These are different from your typical entry or open/close sensors because they account for how some garage doors tilt while closing.

Keep Things Locked

It may seem like a no-brainer, but locks are a surefire way to secure your garage.


If your garage has a service door, put a secure deadbolt on it. Do the same with the door that separates the garage from the mudroom or kitchen.

We recommend a deadbolt over a non-deadbolt lock because a deadbolt can’t move from a locked position unless there’s a key in the cylinder. That makes it far safer than your typical lock mechanism.

Alternatively, you can put a padlock on the service door if you don’t use it much. You can also padlock things inside the garage, like tools and bikes.

Garage Shield

Several years ago, the web was full of videos of people opening closed garage doors in six seconds or less

All it took was 1) a wedge to open a gap between the weather sealing and the door and 2) a coat hanger to reach the emergency release.

To keep this from happening to you, we suggest using a garage door shield, such as the Garage Shield. 

This shield protects the area near the emergency release mechanism, making it impossible to open.

Protect Your Windows

Did you forget about the garage windows? They’re easy to overlook. But they need protection, too.

Window Sensors

If you have garage windows that slide open, put sensors on them. You can buy window sensors on their own, but we generally recommend a complete security suite.

Window Film

If your garage windows don’t slide open, you can still protect them by making them shatter-resistant. 

The quickest and easiest way to do this is to buy some window film. You can get window film in pre-cut pieces or cut off a custom-sized piece from a big roll.

Best of all, window film is relatively inexpensive, especially when compared to sensors or cameras.

Add Cameras

Aim cameras at your garage door and garage interior to ward off potential mischief. 

The mere presence of a camera deters the type of criminals and busybodies who misbehave only when they know they won’t get caught.

How To Make Your Garage Door Smart

If you’re wondering how to make your garage door bright, you should start by going with a home security system that offers a garage door sensor. 

The companies we highlight above each offer a smart sensor that mounts to your garage ceiling. 

You’ll also want to download the mobile companion app offered by the security company you choose.

Armed with the app, you’ll be able to control your garage door from pretty much anywhere in the world. 

You were heading to the airport to catch a flight but wondering if you’ve forgotten to close the garage? 

No problem. Just pop into the app to see your garage door status, and a simple flick of the thumb makes your home safe and secure.

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