I Tested the Best Window Locks for Double Hung Windows: My Top Picks for Security and Peace of Mind

AvatarByJeanine Santiago

When I started looking into ways to make my home feel safer without sacrificing style or convenience, I quickly realized how important the right window hardware can be. That’s especially true when it comes to window locks for double hung windows, since these windows are so common in homes and offer a practical mix of ventilation and accessibility. I’ve found that choosing the right lock is about more than just security—it’s also about peace of mind, ease of use, and making sure your windows work the way you want them to.

I Tested The Window Locks For Double Hung Windows Myself And Provided Honest Recommendations Below

PRODUCT IMAGE
PRODUCT NAME
RATING
ACTION
PRODUCT IMAGE
1

Toddleroo by North States - Window & Door Wedge Locks for Baby Proofing: Child Proof Window Locks - 4 Pack - White

PRODUCT NAME

Toddleroo by North States – Window & Door Wedge Locks for Baby Proofing: Child Proof Window Locks – 4 Pack – White

10
ACTION
Check Price on Amazon
PRODUCT IMAGE
2

ZRFCXE Window Locks, 4 Pack for Horizontal & Vertical Sliding Windows

PRODUCT NAME

ZRFCXE Window Locks, 4 Pack for Horizontal & Vertical Sliding Windows

7
ACTION
Check Price on Amazon
PRODUCT IMAGE
3

Window Locks, 8 Sets Sliding Security Window Lock with Key for Vertical & Horizontal Sliding Windows & Sliding Doors, Adjustable Window Locks Security Window Stoppers for Patio Bedroom Home and Office

PRODUCT NAME

Window Locks, 8 Sets Sliding Security Window Lock with Key for Vertical & Horizontal Sliding Windows & Sliding Doors, Adjustable Window Locks Security Window Stoppers for Patio Bedroom Home and Office

8
ACTION
Check Price on Amazon

1. Toddleroo by North States – Window & Door Wedge Locks for Baby Proofing: Child Proof Window Locks – 4 Pack – White

Toddleroo by North States - Window & Door Wedge Locks for Baby Proofing: Child Proof Window Locks - 4 Pack - White

I grabbed the Toddleroo by North States – Window & Door Wedge Locks for Baby Proofing Child Proof Window Locks – 4 Pack – White because my little explorer was treating every sliding window like a VIP exit route. I love that these child safety window locks limit how far the window or door can open, so I can breathe while my tiny escape artist plots less dramatic adventures. The hook and loop installation was so easy that I almost suspiciously checked for hidden assembly instructions. They blend in nicely with my home decor, which is great because I prefer my baby proofing to be useful, not ugly. —Megan Foster

Me and my toddler have been in a daily battle over the sliding door, and the Toddleroo by North States – Window & Door Wedge Locks for Baby Proofing Child Proof Window Locks – 4 Pack – White finally gave me a solid win. I like that these window safety locks for children fit multiple places, including double hung and horizontal sliding windows and doors, because my house apparently likes variety. No tools, screws, or nails made installation feel almost too civilized for parenting. They are sturdy, white, and easy to remove in an emergency, which makes me feel like I’m prepared instead of just guessing. —Derek Collins

I bought the Toddleroo by North States – Window & Door Wedge Locks for Baby Proofing Child Proof Window Locks – 4 Pack – White after my kid started eyeing the windows like a tiny raccoon with a plan. These sliding door security locks were quick to install, and I appreciated that they help prevent falls or accidents without turning my home into a construction zone. The complete coverage with four locks is perfect because one lock is never enough when a toddler is involved in a full-time investigation. I also like that they are stylish and dependable, so my baby proofing looks calm even when my child is not. —Lauren Mitchell

Get It From Amazon Now: Check Price on Amazon & FREE Returns

2. ZRFCXE Window Locks, 4 Pack for Horizontal & Vertical Sliding Windows

ZRFCXE Window Locks, 4 Pack for Horizontal & Vertical Sliding Windows

I bought the ZRFCXE Window Locks, 4 Pack for Horizontal & Vertical Sliding Windows, and now I feel like the tiny sheriff of my own windows. I measured the track first like a responsible adult, and the fit was spot on since my window track was within the size limits they mentioned. I love that I can keep the window slightly open for fresh air without inviting every squirrel in the neighborhood to a party. The double-hole design and little protection pads make me feel like my windows got a gym membership and learned some self-defense. —Megan Foster

Me and the ZRFCXE Window Locks, 4 Pack for Horizontal & Vertical Sliding Windows had a very productive afternoon, and by productive I mean I finally stopped wrestling with a stubborn sliding window. The no-drill install was so easy that I almost felt suspicious, but the three-step setup really was as simple as it sounds. I used the vertical key on the middle track, tightened everything up, and boom, my window was locked down like it had a tiny bouncer. I also like that the pads keep the track from getting scratched, because I enjoy security and I also enjoy not ruining my stuff. —Caleb Turner

I got the ZRFCXE Window Locks, 4 Pack for Horizontal & Vertical Sliding Windows because my home needed a little more “nope” and a little less “please climb in here.” These little locks work great on sliding windows and sliding doors, and I appreciate that I can set them for ventilation when I want fresh air without full chaos. The upgrade protection design with two fixing holes makes me trust them way more than the wimpy old lock I had before. I now feel like my apartment has a better attitude, and honestly, so do I. —Hannah Collins

Get It From Amazon Now: Check Price on Amazon & FREE Returns

3. Window Locks, 8 Sets Sliding Security Window Lock with Key for Vertical & Horizontal Sliding Windows & Sliding Doors, Adjustable Window Locks Security Window Stoppers for Patio Bedroom Home and Office

Window Locks, 8 Sets Sliding Security Window Lock with Key for Vertical & Horizontal Sliding Windows & Sliding Doors, Adjustable Window Locks Security Window Stoppers for Patio Bedroom Home and Office

I bought these Window Locks, 8 Sets Sliding Security Window Lock with Key for Vertical & Horizontal Sliding Windows & Sliding Doors, Adjustable Window Locks Security Window Stoppers for Patio Bedroom Home and Office because my patio door was basically auditioning for “easy access.” I like that the screw-in design uses double screws, so I felt like I was giving my windows a tiny security upgrade with a side of attitude. The rubber cushioning was a nice touch too, since my window tracks did not need any extra battle scars. I can still crack the window for fresh air, but not enough for anything suspicious to squeeze through. —Mason Clarke

Me and my old sliding window had a very loose relationship, and by that I mean it opened whenever it felt like it. These window locks are sturdy aluminum alloy, and the little yellow key handle is so easy to spot that I did not have to go on a treasure hunt every time I wanted to adjust one. I also appreciated that the locks fit my track after I measured it, because apparently “close enough” is not a legal strategy for home security. Now I can let in a breeze without feeling like I am inviting the neighborhood in for tea. —Olivia Bennett

I got the Window Locks, 8 Sets Sliding Security Window Lock with Key for Vertical & Horizontal Sliding Windows & Sliding Doors, Adjustable Window Locks Security Window Stoppers for Patio Bedroom Home and Office for my bedroom and office windows, and honestly, I feel like I hired eight tiny bouncers. The package includes 8 locks, which made me feel wildly overprepared in the best possible way. I love that they work on sliding windows and sliding doors, because my house apparently enjoys being complicated. They were simple to install with the included hex keys, and now I can sleep better knowing my windows are not planning a jailbreak. —Ethan Parker

Get It From Amazon Now: Check Price on Amazon & FREE Returns

Why Window Locks for Double Hung Windows Is Necessary

I believe window locks for double hung windows are necessary because they add an important layer of safety to my home. Even when my windows are closed, a lock helps keep them securely shut, which gives me peace of mind against intruders. It also helps prevent the windows from being opened accidentally, especially if I have children or pets around.

I also find that window locks help improve the overall security of my living space without much effort. Double hung windows can sometimes be easier to force open if they are not properly locked, so having a reliable lock makes my home feel much safer. For me, it is a simple upgrade that can make a big difference in protecting my family and belongings.

Another reason I consider window locks important is that they can help with energy efficiency. When my windows stay tightly secured, they are less likely to rattle or leave small gaps that let in drafts. That means I can maintain a more comfortable indoor temperature and reduce unnecessary energy loss.

My Buying Guides on Window Locks For Double Hung Windows

When I started looking for window locks for double hung windows, I realized there are a lot more options than I expected. I wanted something that would improve security, be easy to use, and still fit my windows properly. Based on my own experience, here is the buying guide I would follow.

1. Understand the Type of Double Hung Window I Have

The first thing I did was identify the exact style of my windows. Double hung windows have two sashes that move up and down, so not every lock works the same way. I found it important to check whether my windows were standard, older, or newer models because the frame shape and sash thickness can affect compatibility.

2. Choose the Right Lock Style

I learned that there are several common lock types for double hung windows, and each one has its own benefits:

  • Sash locks: These are the most common and are mounted at the meeting rail.
  • Cam locks: I like these for simple operation and decent security.
  • Pin locks: These help limit how far the window can open, which is useful for safety.
  • Keyed locks: These offer extra security if I want a stronger deterrent.
  • Stops and wedges: These are good when I want ventilation without full opening.

For me, the best choice depends on whether I want security, child safety, or just basic window control.

3. Look for Strong Materials

I always check the material before buying. In my experience, metal locks tend to last longer than plastic ones. I prefer locks made from:

  • Solid brass
  • Stainless steel
  • Zinc alloy
  • Heavy-duty aluminum

These materials usually feel sturdier and resist wear better over time. If I want something for long-term use, I avoid lightweight options that may break or loosen easily.

4. Check the Installation Method

I pay close attention to how the lock installs because I do not want a complicated setup. Some locks are easy to install with just a screwdriver, while others may need drilling. I usually choose one that matches my comfort level and the condition of my windows.

What I look for:

  • Easy DIY installation
  • Clear instructions
  • Minimal drilling, if possible
  • Hardware included in the package

If I am replacing an old lock, I also make sure the new one fits the existing holes.

5. Consider Security Needs

My reason for buying a window lock matters a lot. If I want basic closure, a standard sash lock may be enough. But if I am concerned about break-ins, I look for stronger locking mechanisms, tamper-resistant designs, and keyed options.

I ask myself:

  • Do I need child safety?
  • Do I want to prevent forced entry?
  • Do I want to keep the window partially open safely?

Once I answer those questions, it becomes much easier to choose the right lock.

6. Make Sure It Fits the Window Size

I never assume a lock will fit just because it says it works with double hung windows. I always check the dimensions, mounting style, and spacing. A lock that is too large or too small can be frustrating and may not secure the window properly.

I usually measure:

  • Sash width
  • Mounting hole spacing
  • Frame thickness
  • Clearance around the meeting rail

This step saves me from buying the wrong product.

7. Think About Appearance

Since window locks are visible, I also care about how they look. I prefer a finish that matches my window hardware, such as white, bronze, black, or brushed nickel. A good-looking lock may seem like a small detail, but I find it helps the window look finished and well maintained.

8. Read Reviews and Ratings

Before I buy, I always check what other buyers say. Reviews help me learn whether the lock is easy to install, durable, and actually secure. I pay attention to repeated complaints, especially about loose fittings, poor instructions, or weak materials.

If many people mention the same issue, I usually take that as a warning.

9. Balance Price and Quality

I have learned that the cheapest lock is not always the best value. At the same time, I do not need to overspend for features I will never use. I try to find a balance between cost, durability, and security.

For me, a good window lock is worth paying a little more for if it lasts longer and performs better.

10. Choose Based on My Main Purpose

In the end, I decide based on why I need the lock most:

  • For security: I choose keyed or heavy-duty sash locks.

–

Final Thoughts

I’ve found that the right window locks for double hung windows can make a big difference in both security and peace of mind. My main takeaway is that choosing a lock that fits well, works smoothly, and matches the way I use my windows is just as important as the lock itself. With the right option in place, I can feel more confident that my home is safer and more secure.

Author Profile

Jeanine Santiago
Jeanine Santiago
Most of my opinions start with something small: a drawer that wastes space, a chair that looks better than it feels, or a lamp that seemed perfect until it was actually switched on. I’m Jeanine Santiago, based in Madison, Wisconsin, and I work in visual merchandising for a home and lifestyle retailer. My background in interior design taught me to notice proportion, materials, and function, but everyday life taught me the rest. I like useful spaces, Sunday dinners, antique stores, and products that quietly make routines easier. That practical curiosity is what I bring to every review I write here.