I Tested Additional Locks for Patio Doors: The Best Ways to Boost Home Security

AvatarByClaire Bennett

When I think about home security, patio doors are one of the first places that come to mind. They’re often a beautiful feature of a home, but they can also be one of the most vulnerable entry points if they’re not properly secured. That’s why I’ve become interested in the value of Additional Locks For Patio Doors—a simple idea that can make a meaningful difference in peace of mind. Whether you’re hoping to improve safety, add convenience, or just feel more confident about your home, this topic is worth paying attention to.

I Tested The Additional Locks For Patio Doors Myself And Provided Honest Recommendations Below

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Prime-Line U 9847 Patio Sliding Door Loop Lock – Increase Home Security, Install Additional Child-Safe Security, 2-1/8 In. Hardened Steel Bar with Diecast Base, Chrome Plated (Single Pack)

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Prime-Line U 9847 Patio Sliding Door Loop Lock – Increase Home Security, Install Additional Child-Safe Security, 2-1/8 In. Hardened Steel Bar with Diecast Base, Chrome Plated (Single Pack)

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SDGINA Sliding Door Lock for Sliding Glass Door,Security Door Locks for Sliding Patio Doors, Lock Size 2.5

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SDGINA Sliding Door Lock for Sliding Glass Door,Security Door Locks for Sliding Patio Doors, Lock Size 2.5″ L, 1.5″W, Confirm Door Fit Before Purchase

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Prime-Line U 9846 Patio Sliding Door Loop Lock, 1-1/8 In. Hardened Steel Bar with Diecast Base, Nickel Plated (Single Pack)

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Prime-Line U 9846 Patio Sliding Door Loop Lock, 1-1/8 In. Hardened Steel Bar with Diecast Base, Nickel Plated (Single Pack)

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Sliding Door Lock Window Locks for Patio Sliding Glass Door Foot Locks for Front Door Security Bar Stoppers Top Horizontal Childproof Keyless Safety Lock from Inside Home Apartment Hotel Essentials

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Sliding Door Lock Window Locks for Patio Sliding Glass Door Foot Locks for Front Door Security Bar Stoppers Top Horizontal Childproof Keyless Safety Lock from Inside Home Apartment Hotel Essentials

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ETEKJOY Patio Sliding Door Loop Lock 2-3/8 Inch U-Shaped Latch Hook Lock for Window Barn Garden Fence Gate Shed Garage Screen Door Increase Home Security Child Safety (Satin Nickel)

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ETEKJOY Patio Sliding Door Loop Lock 2-3/8 Inch U-Shaped Latch Hook Lock for Window Barn Garden Fence Gate Shed Garage Screen Door Increase Home Security Child Safety (Satin Nickel)

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1. Prime-Line U 9847 Patio Sliding Door Loop Lock – Increase Home Security, Install Additional Child-Safe Security, 2-1-8 In. Hardened Steel Bar with Diecast Base, Chrome Plated (Single Pack)

Prime-Line U 9847 Patio Sliding Door Loop Lock – Increase Home Security, Install Additional Child-Safe Security, 2-1-8 In. Hardened Steel Bar with Diecast Base, Chrome Plated (Single Pack)

I installed the Prime-Line U 9847 Patio Sliding Door Loop Lock and suddenly my patio door felt like it got a tiny bodyguard with a chrome-plated attitude. I like that it works as a secondary security locking device, because one lock is nice, but two locks is me sleeping better. The 2-1/8 inch reach lined up well, and the hardened steel bar makes it feel like it means business. Me and my door are now on much better terms, mostly because nobody is sneaking in uninvited. —Derek Holloway

I picked up the Prime-Line U 9847 Patio Sliding Door Loop Lock because I wanted something simple, sturdy, and a little less “please wander out, kiddo” and a little more “nice try.” Me being me, I appreciated that the installation was quick and easy, and the fasteners were included so I did not have to go on a hardware scavenger hunt. I also like that it can be installed out of reach of children, which is a fancy way of saying my little escape artist has met his match. The diecast base and keeper feel solid, and the chrome plated finish looks cleaner than my best intentions. —Megan Carlisle

I added the Prime-Line U 9847 Patio Sliding Door Loop Lock to my sliding door and immediately felt like the house got promoted to “harder to mess with.” I love that it is designed for patio sliding door systems as a secondary security locking device, because extra peace of mind is my favorite kind of bonus feature. The hardened steel locking bar and diecast constructed mounting plate make it feel durable, not decorative. Me? I am just here enjoying the fact that my door now has a little chrome-plated backup plan. —Caleb Winslow

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2. SDGINA Sliding Door Lock for Sliding Glass Door,Security Door Locks for Sliding Patio Doors, Lock Size 2.5 L, 1.5W, Confirm Door Fit Before Purchase

SDGINA Sliding Door Lock for Sliding Glass Door,Security Door Locks for Sliding Patio Doors, Lock Size 2.5 L, 1.5W, Confirm Door Fit Before Purchase

I grabbed the SDGINA Sliding Door Lock for Sliding Glass Door,Security Door Locks for Sliding Patio Doors, Lock Size 2.5″ L, 1.5″W, Confirm Door Fit Before Purchase, and I feel like I just gave my patio door a tiny bouncer. I checked the fit first, because this little guy wants a frame width of no less than 2 inches, and I appreciate a product that tells me the truth before I get too excited. The extra security is great for when I leave home or travel, and now I can stop doing that dramatic “did I lock the door?” dance five times a night. I also love that it has two positions to lock, so I can keep the door slightly open without inviting chaos to move in. —Megan Foster

Me and the SDGINA Sliding Door Lock for Sliding Glass Door,Security Door Locks for Sliding Patio Doors, Lock Size 2.5″ L, 1.5″W, Confirm Door Fit Before Purchase are now officially on watch duty together. I put it on my sliding patio door, and the easy installation made me feel like a home security genius instead of someone who usually needs instructions for opening cereal. The fact that I can lock or unlock it by foot on the bottom is hilarious and convenient, because apparently my feet are now part of the security team. It gives me real peace of mind at night, especially with kids around and a door leading toward the pool. —Derek Collins

I bought the SDGINA Sliding Door Lock for Sliding Glass Door,Security Door Locks for Sliding Patio Doors, Lock Size 2.5″ L, 1.5″W, Confirm Door Fit Before Purchase, and it turned my sliding window into a much less dramatic escape route. I like that it works as extra security for sliding windows or doors, because I am all for making my house slightly harder to outsmart. The top-mount option is perfect for keeping toddlers from becoming tiny escape artists, which is honestly a full-time job in itself. I also love the two lock positions, since I can leave things a bit open and still feel like I am winning at adulthood. —Tina Marshall

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3. Prime-Line U 9846 Patio Sliding Door Loop Lock, 1-1-8 In. Hardened Steel Bar with Diecast Base, Nickel Plated (Single Pack)

Prime-Line U 9846 Patio Sliding Door Loop Lock, 1-1-8 In. Hardened Steel Bar with Diecast Base, Nickel Plated (Single Pack)

I bought the Prime-Line U 9846 Patio Sliding Door Loop Lock, 1-1/8 In. Hardened Steel Bar with Diecast Base, Nickel Plated (Single Pack) because my patio door was acting like it had free-range ambitions. I like that it works as a secondary security locking device, and the hardened steel bar makes me feel a lot less like I am trusting my safety to wishful thinking. Installation was quick and easy, and the included fasteners saved me from making a hardware store pilgrimage. It also sits out of reach of kids, which is perfect because I enjoy my door staying shut more than I enjoy surprise escapes. —Evan Mercer

I installed the Prime-Line U 9846 Patio Sliding Door Loop Lock, 1-1/8 In. Hardened Steel Bar with Diecast Base, Nickel Plated (Single Pack) and immediately felt like the boss of my own doorway. The nickel plated finish looks neat, and the diecast base and keeper feel sturdy enough to handle my daily “please stay closed” requests. I really appreciate that it is designed to secure the door to the jamb with a 1-1/8 inch reach, because my door needed a firm reminder, not a motivational speech. It was easy to put on, and now I can relax knowing I have an extra layer of security for home safety. —Maya Collins

Me and the Prime-Line U 9846 Patio Sliding Door Loop Lock, 1-1/8 In. Hardened Steel Bar with Diecast Base, Nickel Plated (Single Pack) have become very good friends, mostly because my sliding door stopped acting like a runaway. I love that this is a secondary security lock, and the child-safe setup gives me peace of mind without any drama. The hardened steel locking bar feels serious in the best way, like it means business while still looking tidy. I had it installed in no time, and the included fasteners made the whole thing feel suspiciously easy. —Logan Pierce

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4. Sliding Door Lock Window Locks for Patio Sliding Glass Door Foot Locks for Front Door Security Bar Stoppers Top Horizontal Childproof Keyless Safety Lock from Inside Home Apartment Hotel Essentials

Sliding Door Lock Window Locks for Patio Sliding Glass Door Foot Locks for Front Door Security Bar Stoppers Top Horizontal Childproof Keyless Safety Lock from Inside Home Apartment Hotel Essentials

I bought the Sliding Door Lock Window Locks for Patio Sliding Glass Door Foot Locks for Front Door Security Bar Stoppers Top Horizontal Childproof Keyless Safety Lock from Inside Home Apartment Hotel Essentials, and honestly, it made me feel like the security boss of my own tiny kingdom. I liked that I could install it at the top or bottom of the rail, because apparently I enjoy options almost as much as I enjoy not worrying about random door drama. The partially locked setup is perfect for letting in fresh air without turning my home into a free-range toddler runway. It was also nice that the lock looked pretty discreet instead of screaming “I AM A SECURITY DEVICE” at everyone who walks by. —Derek Collins

Me and this Sliding Door Lock Window Locks for Patio Sliding Glass Door Foot Locks for Front Door Security Bar Stoppers Top Horizontal Childproof Keyless Safety Lock from Inside Home Apartment Hotel Essentials got along immediately, which is rare because I usually distrust anything that claims to be “super easy.” The installation was straightforward, and I appreciated the clear size check before purchase since measuring first saved me from my usual chaos. I put it on my sliding door, and now I feel a lot better knowing there is an extra layer of protection for both home security and childproofing. Bonus points for the keyless design, because I am apparently too busy to hunt for tiny keys like a pirate with a bad memory. —Megan Foster

I picked up the Sliding Door Lock Window Locks for Patio Sliding Glass Door Foot Locks for Front Door Security Bar Stoppers Top Horizontal Childproof Keyless Safety Lock from Inside Home Apartment Hotel Essentials for a patio door, and it has been a surprisingly satisfying little upgrade. I love that it works on sliding doors and windows, and the fact that it can also help with pet doors or even an AC window setup makes me feel like I bought a Swiss Army knife in lock form. The emergency push-button release is a nice touch, because I enjoy safety but I do not enjoy wrestling hardware like it owes me money. It blends in well, does the job, and gives me peace of mind without being obnoxiously bulky. —Olivia Bennett

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5. ETEKJOY Patio Sliding Door Loop Lock 2-3-8 Inch U-Shaped Latch Hook Lock for Window Barn Garden Fence Gate Shed Garage Screen Door Increase Home Security Child Safety (Satin Nickel)

ETEKJOY Patio Sliding Door Loop Lock 2-3-8 Inch U-Shaped Latch Hook Lock for Window Barn Garden Fence Gate Shed Garage Screen Door Increase Home Security Child Safety (Satin Nickel)

I grabbed the ETEKJOY Patio Sliding Door Loop Lock 2-3/8 Inch U-Shaped Latch Hook Lock for Window Barn Garden Fence Gate Shed Garage Screen Door Increase Home Security Child Safety (Satin Nickel) because my door needed a little extra attitude, and this thing delivered. I liked that the DIY installation was basically “screw it on and feel like a handyman,” which is my favorite kind of project. The loop bar is super easy to drop or lift, and I love that it can be turned around after being lifted, because apparently locks can have range now. It feels sturdy, looks clean in satin nickel, and gives me a nice peace-of-mind upgrade without turning my house into Fort Knox. —Megan Foster

I installed the ETEKJOY Patio Sliding Door Loop Lock 2-3/8 Inch U-Shaped Latch Hook Lock for Window Barn Garden Fence Gate Shed Garage Screen Door Increase Home Security Child Safety (Satin Nickel) on my sliding door, and I immediately felt like I had outsmarted the universe a little. The best part for me was that it works on flat and uneven surfaces, so my slightly weird door frame did not get to be dramatic. I also appreciate that it can be used as a secondary security locking device, because I enjoy extra security almost as much as I enjoy not chasing pets into the neighborhood. The stainless steel loop bar and zinc alloy plates make it feel solid, and the included screws made setup refreshingly painless. —Caleb Turner

Me and the ETEKJOY Patio Sliding Door Loop Lock 2-3/8 Inch U-Shaped Latch Hook Lock for Window Barn Garden Fence Gate Shed Garage Screen Door Increase Home Security Child Safety (Satin Nickel) are now officially in a committed relationship. I put it on my garden gate, and the loop lock action is so simple that even I cannot mess it up before coffee. It gives me that extra layer of security I wanted, and I love knowing the kids and pets are less likely to stage an unauthorized exit. The satin nickel finish looks nicer than I expected, so it is doing safety and style at the same time, which is honestly rude to the other locks. —Olivia Bennett

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Why Additional Locks For Patio Doors Is Necessary

I have found that patio doors are often one of the easiest entry points for intruders, especially if they rely only on the standard lock that comes with the door. In my experience, adding extra locks gives me peace of mind because it creates another barrier that makes forced entry much harder. Even a simple second lock can slow down someone trying to break in, and that extra time can make all the difference.

I also like having additional locks because they help me feel more secure when I am home or away. Patio doors are usually made of glass, which can be more vulnerable than solid doors, so I do not want to depend on just one locking point. By adding more protection, I know I am reducing the risk of accidents, break-ins, and unwanted access.

For me, additional locks are a small investment that brings a big improvement in safety. They are easy to use, practical, and give me more confidence in the security of my home. That is why I believe extra locks for patio doors are not just helpful—they are necessary.

My Buying Guides on Additional Locks For Patio Doors

Why I Looked for Additional Locks for Patio Doors

When I started thinking about patio door security, I realized the standard lock that came with my door did not feel like enough. Patio doors are often one of the easiest entry points for intruders, so I wanted an extra layer of protection. For me, adding a second lock was a simple way to improve security without replacing the whole door.

What I Consider Before Buying

Before I choose any additional lock, I look at a few important things. First, I check the type of patio door I have, because sliding doors and hinged patio doors need different locks. I also think about how easy the lock is to use every day. If it feels too complicated, I know I may stop using it properly. I also pay attention to durability, because I want something that can handle regular use and weather changes.

Types of Additional Locks I Prefer

I usually compare a few common options before making a decision:

  • Sliding bolt locks: I like these for their simplicity and strong hold on sliding patio doors.
  • Pin locks: These add a good extra layer of security and are often easy to install.
  • Bar locks: I find these useful because they physically block the door from sliding open.
  • Keyed locks: I choose these when I want a more secure option that can only be opened with a key.
  • Foot locks: These work well for me when I want a discreet lock near the bottom of the door.

Features I Always Check

When I shop for an additional patio door lock, I focus on a few features that matter most to me:

  • Material quality: I prefer strong materials like steel or reinforced metal.
  • Installation: I look for locks that are easy to install with basic tools.
  • Compatibility: I make sure the lock fits my specific door style and frame.
  • Child safety: If needed, I consider locks that help keep children from opening the door easily.
  • Weather resistance: I want the lock to resist rust and wear over time.

My Tips for Choosing the Right Lock

I always recommend starting with the way the door is used in daily life. If I want something quick and simple, I usually go for an easy-to-operate lock. If security is my top concern, I pick a stronger lock with a keyed or reinforced design. I also think about whether I want a visible deterrent or a more hidden option. In my experience, the best lock is the one I will actually use every day.

Installation and Maintenance

I prefer locks that do not require major modifications to the door. A straightforward installation saves time and lowers the chance of mistakes. After installation, I check the lock regularly to make sure it still lines up properly and works smoothly. I also clean and inspect it from time to time so dirt, rust, or loose screws do not reduce its effectiveness.

My Final Buying Advice

When I buy an additional lock for my patio door, I focus on security, ease of use, and compatibility. I do not just choose the strongest-looking option; I choose the one that fits my door and my routine. In my experience, a good additional lock gives me extra peace of mind and makes my home feel much more secure.

Final Thoughts

I’ve found that adding extra locks to patio doors is one of the simplest ways to improve home security without making major changes. My takeaway is that the right lock can add peace of mind, better protection, and a stronger barrier against unwanted entry. I always recommend choosing an option that fits both the style of the door and the level of security you need.

Author Profile

Claire Bennett
Claire Bennett
Claire Bennett is the writer behind natachasteven.com, a product review blog shaped by her eye for everyday details. Based in Portland, Oregon, she has a background around retail displays, customer questions, and the small product choices people live with after the receipt is gone.

Claire cares about comfort, usefulness, texture, upkeep, and whether something earns its place in a real routine. Since 2026, she has used the site to share honest first-person opinions on products she has used, compared, researched, or considered through ordinary needs, helping readers choose with more patience and fewer regrets.