How Do You Burglar Proof a Patio Door?
Patio doors are one of the most common entry points burglars use to break into homes. A flimsy lock or a door that slides out of its track can be all it takes. But securing your patio door doesn’t have to be complicated or expensive — and you don’t have to wait for something bad to happen to take action.
Whether you have a sliding glass door, a French door, or a hinged patio door, each style comes with its own weak points. This guide covers real, practical ways to make your patio door a lot harder to break through — using simple upgrades that most homeowners can do themselves or with a little professional help.
Why Patio Doors Are a Common Target
Most patio doors come with basic locks from the factory — the kind that can be defeated with a credit card or by simply lifting the door off its track. Burglars know this. In fact, sliding glass doors are sometimes called the “welcome mat” of the home because they’re so easy to force open when they’re not properly secured.
Beyond weak locks, patio doors also tend to be in the back or side of the house — out of view from the street — which gives a burglar more time and privacy to work.
“Most break-ins through patio doors happen in under 60 seconds. The right security upgrades can turn your door from easy target to not worth the trouble.”
8 Ways to Burglar Proof Your Patio Door
tips 1
Add a Security Bar or Rod in the Track
This is the simplest and cheapest fix. Place a cut-down wooden dowel, metal rod, or a purpose-built security bar in the bottom track of a sliding door. This stops the door from being slid open even if the lock is picked or defeated. For just a few dollars, it’s one of the most effective deterrents you can use.
tips 2
Upgrade the Existing Lock
Factory-installed patio door locks are often low quality. Replacing them with a high-grade keyed lock or a double-bolt lock adds a real layer of protection. A patio door security fix from a licensed locksmith ensures the lock is fitted correctly and actually does its job.
tips 3
Install Anti-Lift Pins or Security Plates
Sliding doors can often be lifted right off their tracks from the outside. Anti-lift pins — small screws inserted into the top frame above the door — prevent the door from being raised up and out. This is a quick DIY fix that many homeowners don’t know about until it’s too late.
tips 4
Apply Security Window Film
Patio doors are usually large glass panels, and glass breaks. Security film won’t stop a determined thief from eventually getting through, but it holds shattered glass together and dramatically slows entry. Most burglars don’t want to spend extra minutes at a house — delay is your friend.
Serving the South Denver Metro?
If you’re in the Englewood area and want a licensed locksmith to assess and upgrade your patio door security, our Englewood Locksmith team is available to help you choose and install the right hardware.
tips 5
Use a Double-Keyed Deadbolt for Hinged Patio Doors
French-style and hinged patio doors have different vulnerabilities than sliding doors. A double-keyed deadbolt requires a key on both sides to open, which stops a burglar from breaking a glass panel, reaching through, and unlocking the door from the inside. Just remember to keep a key nearby in case of a fire emergency.
tips 6
Add a Smart Lock or Door Alarm
A door sensor alarm alerts you the moment your patio door is opened or forced. These are inexpensive and connect easily to most home security systems. Smart locks let you monitor access remotely and receive alerts on your phone — handy if you travel or have a vacation property.
tips 7
Put Up Motion-Activated Outdoor Lighting
Darkness is a burglar’s best friend. A motion-activated light that floods your patio area the moment someone approaches removes that cover entirely. Install lights at a height that’s hard to reach and angle them to cover the full door area. This one change can stop a break-in before it even starts.
tips 8
Plant Thorny Shrubs Around the Patio Area
This sounds old-fashioned, but it works. Dense, thorny plants — like barberry, hawthorn, or rose bushes — planted along fence lines or under windows add a natural deterrent. Nobody wants to climb through a rose bush. It’s a low-cost, low-maintenance, and surprisingly effective layer of security.
Quick Security Audit: Check These Right Now
Patio Door Security Checklist
What About French Doors?
French doors have their own set of issues. Many have weak center astragal bolts — the bolts that shoot into the floor and ceiling to hold the inactive door shut. These can be forced with a strong kick. Upgrading to heavy-duty flush bolts and adding a multi-point locking system makes a French door significantly more secure.
A locksmith who specializes in patio door security fixes in Denver can assess exactly what your door needs — because not every fix works for every door type.
Frequently Asked Questions
Talk to a Local Locksmith Today
Rawkeys Locksmith is based in Littleton, CO and serves the entire Denver metro area. If you want a professional eye on your patio door security — or need hardware installed the right way — give us a call.
