*Updated October 3rd, 2025

Windows might not be the first thing that comes to mind when you think of home security, but they’re one of the most common entry points for burglars. In fact, approximately 23% of break-ins occur through first-floor windows—often because they’re left unlocked or outfitted with inadequate window locks. While many homeowners prioritize securing doors, ensuring your window hardware is reliable is just as crucial to prevent unauthorized access.

Whether you live in a ground-floor apartment, a suburban home, or a high-rise condo, the right window lock can make all the difference in safeguarding your family and possessions. In this guide, we’ll walk you through the best window lock types to help you choose the most effective solution for protecting your home.

Keyed Window Locks

Keyed window locks are among the most secure and reliable options, especially for ground-level or residential double-hung windows. These locks require a key to operate, ensuring that only authorized individuals can open the sash window. This added layer of protection makes it nearly impossible for an intruder to force them open without breaking the glass.

How They Work

Keyed window sash locks typically mount onto the window frame or sash. When engaged with a key, the bolt or cam secures the sash firmly in place. Many homeowners use these as secondary measures alongside the built-in latch to keep windows secure.

Pros & Cons

• Provides excellent window security, especially at ground level
• Works as an additional lock alongside a standard window latch
• Must track and store keys safely
• In emergencies, searching for a key could slow evacuation

Best for: Homeowners securing ground-level or balcony-accessible windows.

Sliding Window Locks

Sliding windows are stylish but more vulnerable than hinged or double-hung options. Without proper sliding window locks, they can be lifted from their track.

How They Work

Sliding window locks clamp or bolt onto the track, blocking the window sash from moving. Adjustable models let you crack a sliding window a few inches for airflow while still keeping your home secure. Many are easy to install with just a screw or clamp, making them a popular home improvement accessory.

Pros & Cons

• Effective at securing sliding windows and patio doors
• Adjustable for ventilation while maintaining window security
• May limit airflow
• Some models won’t stop a window sash from being lifted entirely

Best for: Homes with large sliding doors or vinyl windows leading to patios or balconies.

Sash Locks

Sash locks are classic window hardware pieces most often used on double-hung sash windows, where the upper and lower sashes slide vertically. Installed on the meeting rail, these locks keep both sections of the sash window tightly closed.

How They Work

By turning a latch or rotating a lever, a sash lock engages with a keeper (a metal plate mounted opposite the lock), holding the upper and lower sashes together. Modern sash locks feature sturdier hardware than older models, making them harder to tamper with from the outside.

Pros & Cons

• Simple, traditional window latch design
• Fits seamlessly into historic or residential homes
• Not as strong as multi-point locking systems
• Doesn’t allow partial opening

Best for: Homeowners reinforcing older sash windows without full lock replacement.

Window Pin Locks

A cost-effective way to secure windows, pin locks insert directly into a drilled hole in the window sash or track.

• Affordable and easy to install
• Works for sliding windows and double-hung styles
• Requires drilling into the window frame
• Less convenient than a built-in window latch

Hinged Wedge Locks

Hinged wedge locks let homeowners keep windows that slide or double-hung sashes cracked for fresh air without sacrificing security. Installed on the sash or frame, they block movement past a set point.

• Great for child safety and ventilation
• Adjustable and sturdy
• Not as strong as keyed window hardware

Smart Window Locks

For tech-savvy homeowners, smart window locks integrate with home security doors, alarms, and even geofencing. These locks alert you if a window latch is tampered with or left open. Many models work across casement windows, sliding windows, and double-hung styles.

• Real-time monitoring
• Remote control via smartphone
• Integrates with smart home improvement systems
• Higher cost, needs Wi-Fi and batteries

Conclusion

Whether you choose a traditional sash lock, an adjustable sliding window lock, or a high-tech smart security lock, upgrading your window hardware is one of the simplest ways to keep your home secure. From bolts and latches to multi-point locking systems, each option gives homeowners a sturdier barrier against intruders.

Investing in the right window lock types ensures peace of mind, better home security, and stronger protection for your family.

FAQs

What are the disadvantages of a window lock?
Some window locks—especially keyed designs—can be inconvenient if you misplace the key or need to unlock quickly in emergencies.

Are sash locks effective for home security?
Yes. While not as robust as smart or multi-point locking systems, sash locks combined with other window parts like pin locks can deter intruders.

What’s the most secure window style?
Casement windows paired with high-quality keyed or smart window locks are considered among the most secure because the handle and keeper design tightly seals the sash to the frame.offer excellent protection against forced entry.

Sources

• The Prepared
• SafeWise
• Champion Window

Additional Window Resources

• Transform Your Home with Transom Windows
• 12 Questions to Ask a Window Company
• 10 Types of Windows for Your Home