How to Burglar-Proof Your Windows: 9 Proven Methods to Secure Your Home

To burglar-proof your windows, combine physical locks, electronic sensors, and a monitored alarm, especially on first-floor windows. No single fix stops a determined burglar alone. 

Here are 9 proven methods to burglar-proof your windows, including do-it-yourself (DIY) methods, so you can start reinforcing your windows right away.

Key Takeaways

• The strongest approach to burglar-proofing your windows is to layer in physical reinforcement, electronic detection, and a monitored response.
• If you’re renting, you can add sensors, locks, and motion lights without ever touching a drill to burglar-proof your windows.
• If you choose to install window bars on bedroom windows, make sure that they come with a quick-release mechanism, since fire code requires an emergency escape opening.

Why Windows are a Burglar’s Favorite Entry Point

Windows are a burglar’s favorite entry point because first-floor windows give burglars a quiet, low-effort way in. In fact, first-floor windows account for 23% of all burglary entry points, second only to the front door. More than that, 35% of homeowners admit to leaving a first-floor window unlatched while away from home.

Most people lock the front door out of habit and forget the windows, exactly the opening burglars look for. The average burglary lasts only 8 to 12 minutes, so every extra layer of security cuts into that window of time. Each lock, sensor, or alarm added buys you precious seconds.

How to Burglar Proof Your Windows: 9 Methods That Work

Here are 9 methods to burglar-proof your windows, including five-minute fixes and bigger investments. Start wherever your budget allows.

1. Upgrade Your Window Locks

Factory latches on double-hung or sliding windows aren’t built for security. A firm push or a screwdriver can pop them open.

Swap the frame’s Phillips screws for tamper-resistant Allen-head screws too, which prevents forced entry through weak points a burglar could pry loose.

You can get a lock in a store like Home Depot for as low as ~$2, making it one of the most affordable DIY security upgrades here. Upgrading your window locks also requires minimal ongoing maintenance.

Renter Tip: Most locks attach with adhesive or a clamp (not drilling), so you can take them when you move.

2. Install Window Security Film

Security film is a multi-layer polyester laminate on the inside of your glass. It won’t stop a crowbar from cracking the pane, but it holds shattered pieces together in a “spiderweb” pattern, which makes it harder for a burglar to enter.

Installation runs $7 to $15 per square foot, depending on thickness, window size, and labor rates.

3. Add Window Sensors and Glass Break Detectors

Contact sensors trigger the moment a window opens. Acoustic glass break detectors listen for the sound of shattering glass and trip even if the window never moves. Prices at Home Depot start at around $9. 

Both can be connected to a monitored system, so someone gets alerted the moment a window is breached. SafeStreets installs door and window sensors and glass break detectors connected to ADT’s 24/7 monitoring center.

4. Use Window Security Bars or Grilles

Window security bars make sure that an intruder won’t get in from a window. Even if the glass shatters, the bars still block entry. Installed bars run $200 to $2,350 per window.

Plenty of homeowners dislike how bars look. But there are now ornate, low-profile designs that may fit your liking.

Safety Warning: Never install fixed bars on a bedroom window without a quick-release mechanism. The International Residential Code (IRC) requires at least one bedroom window as an emergency escape opening. Swing-away bars with an interior release meet fire code egress requirements safely.

Don’t want bars? Locks, film, sensors, laminated glass, pins, and a monitored system all add protection without metal over your window.

5. Reinforce Glass with Laminated or Double-Pane Windows

Laminated glass sandwiches a vinyl interlayer between two panes, which strengthens glass against shattering attempts since a burglar must strike the same spot repeatedly to punch through.

Tempered glass is cheaper and still solid at around $350 and $750 per window, running 4 to 5 times stronger than annealed glass under the ASTM C1048 standard. Double-pane windows add security plus lower energy bills. It also balances security with natural light and ventilation.

Reinforcing glass with laminated or double-pane windows requires professional installation, better suited to homeowners than renters.

6. Apply Window Pins and Secondary Locking Mechanisms

Window pins and secondary locking mechanisms add one more step a burglar has to defeat. 

If you have double-hung windows, drill a small angled hole through the inner sash and partway into the outer sash, then drop in a removable pin so the window can’t slide open. A window pin costs around $3 at Home Depot.

Sliding windows get a similar fix with a dowel rod cut to fit the bottom track. Both cost next to nothing and need just a drill and a tape measure.

7. Install Motion Sensor Lights Near Windows

Motion-activated LED floodlights light up the moment someone approaches at night. They improve nighttime visibility around entry points and remove the shadows burglars rely on, especially near ground-floor and basement windows. Basic units run $15 to $65 each, plus $50 to $250 for labor.

8. Set Up Security Cameras Covering Window Access Points

Visible cameras deter burglars before an attempt even starts. It also gives you usable footage if one happens anyway.

In a University of North Carolina at Charlotte study of convicted burglars, 60% said they’d seek another target after spotting an alarm or camera.

Aim cameras at ground-floor windows, side yards, and basement window wells. The unit itself ranges from $20 to $400. SafeStreets installs outdoor security cameras connected to ADT monitoring, so you get alarmed whenever there’s someone attempting to enter your home.

9. Connect Everything to a Monitored Home Security System

Homes without a security system are up to 300% more likely to be targeted by burglars than homes with one. Have a monitored home security system to protect your home even further. Once a sensor trips, the monitoring center verifies the alert and dispatches police while you get notified.

A monitored home security system also commonly qualifies homeowners for a 5% to 20% insurance discount, giving you approximately $75–$300 savings per year. Confirm your exact discount with your insurer.

Which Window Security Methods are Right for You?

All costs are estimates only.

Protect Your Windows with SafeStreets and ADT Monitoring

SafeStreets is an ADT Authorized Provider that builds your system around your actual windows. A technician can walk your property, flag the weakest points, and set up same-day installation in most of the United States.

Call 855-891-7233 today or get in touch with our team for a free quote.