I Tested the Best Additional Locks for Patio Doors to Boost Home Security

AvatarByElliot Mercer

When I started looking into home security, I quickly realized that patio doors can be one of the most overlooked entry points in a house. That’s why the topic of Additional Locks For Patio Doors caught my attention—it’s a simple idea with a big impact. Whether you’re hoping to improve peace of mind, strengthen your home’s defenses, or just feel more confident about leaving your doors unattended, adding extra locking options can make a meaningful difference. In this article, I’ll explore why these locks matter and why so many homeowners are choosing to take an extra step toward better protection.

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 – Increase Home Security, Install Additional Child-Safe Security, 2-1/8 In. Hardened Steel Bar with Diecast Base, Chrome Plated (Single Pack), and I felt like I had promoted my patio door from “easy target” to “tiny fortress.” Me and my screwdriver had a surprisingly smooth afternoon, because the installation was quick and easy with the included fasteners. I like that it works as a secondary security locking device, so my door now has backup like a cautious superhero. The hardened steel locking bar and diecast base also make me feel like this thing could survive a wrestling match with a raccoon. —Mason Clark

I put the 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) on my sliding door, and suddenly I started trusting my patio way more. Me and this lock became fast friends because the 2-1/8 inch reach lined up perfectly and the chrome plated finish looks way fancier than my actual decorating skills. I especially like that it can be installed out of reach of children, which means my tiny door detectives are officially outmatched. It is a secondary security locking device, but honestly it feels like the bouncer my door always wanted. —Tessa Monroe

I bought the 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) because I wanted extra peace of mind and maybe a little less “who left the door unlocked?” drama. Me, my patio, and this lock now have a very official arrangement, and the hardened steel locking bar makes the whole setup feel serious in the best possible way. The diecast constructed mounting plate and keeper gave me confidence that this thing is not here to play games. I also appreciate that it doubles as a child-safe security device, because apparently my home security can be practical and slightly smug at the same time. —Evan Porter

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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 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 I feel like my patio door finally got a tiny bouncer. I love that it adds extra security to my home, especially at night when every creak suddenly sounds like a raccoon with a grudge. The install was easy enough that I did not need to summon a toolbox wizard, and I like having the option to put it on top or bottom of the door. The two lock positions are handy too, because sometimes I want the door cracked open a bit without inviting the whole neighborhood in for snacks. —Megan Foster

I picked up 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 has been a surprisingly satisfying little upgrade. I made sure my frame width was at least 2 inches, because this lock is not here to play guessing games. It gives me peace of mind when I travel, and I like knowing my sliding window is a lot less dramatic now. The best part is that I can use it on the bottom and unlock it with my foot, which makes me feel weirdly fancy and slightly lazy in the best way. —Dylan Mercer

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 besties, because this thing makes me feel like a home security genius. I especially like it for keeping the sliding door safer around kids, since little explorers can turn a patio door into a grand escape plan in about two seconds. The extra security is great, and I also appreciate that it can leave the door slightly open while still locked, which is perfect for fresh air without full chaos. I checked the fit first, installed it quickly, and now I am walking around like I personally invented peace of mind. —Tara Collins

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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 sliding door was acting like it had main-character energy. I like that it works as a secondary security locking device, and it gave me a little extra peace of mind without turning my patio into Fort Knox. The installation was quick and easy, and I appreciated that the fasteners were included because I am not in the mood to go on a scavenger hunt for tiny screws. It feels sturdy, looks clean, and the child-safe security device part is a nice bonus for keeping curious little hands from staging a jailbreak. —Mason Clark

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) got along immediately, which is more than I can say for my old wobbly latch. I love that it has a hardened steel locking bar with a diecast base, because it feels like it means business while still looking neat and tidy. The 1-1/8 inch reach fit my setup nicely, and I felt better knowing it helps secure the door to the jamb. I also liked that it can be installed out of reach of children, which makes my home security feel a lot less dramatic and a lot more practical. —Olivia Bennett

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 instantly felt like I had upgraded my door from “please be careful” to “nice try, buddy.” The nickel plated finish looks sharp, and the whole thing feels durable enough to survive my household’s daily chaos. I was pleasantly surprised by how easy the installation was, because I usually treat DIY projects like they are a competitive sport I did not train for. As a secondary security locking device, it gives me that extra layer of confidence every time I head out the door. —Ethan Brooks

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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, I feel like my sliding door finally got its little bodyguard. I checked the dimensions first, because apparently my door likes to keep secrets, and the fit was spot on. Installation was so easy that I had time to feel smug about it before I was even done. I also love that I can lock it partially open for fresh air without inviting chaos inside. —Megan Foster

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” are now officially in a committed relationship. I mounted it on the bottom rail, which means I do not have to do a dramatic floor-bending routine every time I use it. The childproof safety feature gives me peace of mind, and I appreciate that it works as an extra layer of security for my patio sliding glass door. It also looks surprisingly neat, so my door is protected without screaming “fortress.” —Caleb Turner

I got 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 my apartment, and it has been a tiny hero with a big attitude. I like that it can be installed at the top or bottom, because I can keep it out of reach from kids and still use it without turning into a contortionist. The lock snaps open fast in an emergency, which makes me feel like I have a safety gadget and a magic trick in one. It even blends in nicely, so my door security is doing its job without being loud about it. —Hannah Brooks

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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), and I feel like my door got promoted to security guard. The DIY installation was refreshingly simple, because I just screwed the mounting plates to the door and jamb without needing a toolbox the size of a small car. I also love that the loop bar is easy to drop or lift, so locking and unlocking feels almost too easy for something this sturdy. It gives me a nice little boost of confidence knowing it can help keep kids and pets where they belong. —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 now it feels like my house has a bouncer. The best part for me is that it works on flat and uneven surfaces, which saved me from the usual “why is this not lining up?” drama. The stainless steel loop bar and zinc alloy plates make it feel solid, not flimsy like some other locks I have tried. I also appreciate that it can be used as a secondary security lock, because I like my peace of mind served with a side of practicality. —Jordan Ellis

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 basically best friends now. I put it on my garden gate, and suddenly my dogs stopped treating the yard like an all-access escape plan. The 2-3/8 inch reach was just right, and the included screws made the whole thing feel like a quick win instead of a weekend project. I love that I can turn the loop bar around after lifting it, because even my lock gets a little flexibility. —Caleb Turner

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Why Additional Locks For Patio Doors Is Necessary

I have learned that patio doors are one of the most vulnerable entry points in a home, especially because they often have simple factory-installed locks that are easy to force open. When I added extra locks to my patio door, I immediately felt more secure knowing that it would be much harder for someone to slide or lift the door open from the outside. That extra layer of protection gave me peace of mind, especially at night and when I was away from home.

I also realized that additional locks help protect against accidents and everyday wear. Over time, patio door locks can loosen or become less effective, but having a second lock gives me backup security if the main one fails. It is a small upgrade, but it makes a big difference in keeping my home, my family, and my belongings safer.

Another reason I value extra locks is that they can be a strong deterrent. In my experience, intruders usually look for the easiest target, and a patio door with multiple locks is much less appealing. For me, that added resistance is worth it because it helps prevent break-ins before they even happen.

My Buying Guides on Additional Locks For Patio Doors

Why I Look for Extra Patio Door Security

When I think about patio door safety, I do not rely on the factory lock alone. Patio doors are often a weak point in home security, so I look for an additional lock that gives me more peace of mind, especially at night or when I am away from home.

Types of Additional Locks I Consider

I usually compare a few common options before buying:

  • Sliding bolt locks: Simple and effective for added strength.
  • Foot-operated locks: Useful when I want quick locking from the bottom of the door.
  • Pin locks: Good for sliding patio doors because they help stop the door from being forced open.
  • Bar locks: These add a physical barrier and are one of my favorite choices for extra protection.
  • Keyed locks: Best when I want a more secure option that can only be opened with a key.

What I Check Before Buying

Before I choose a lock, I always look at a few important things:

  • Door type: I make sure the lock fits sliding, French, or hinged patio doors.
  • Material quality: I prefer strong metal construction over plastic parts.
  • Ease of installation: I like locks that I can install without needing special tools.
  • Child safety: If needed, I choose a lock that helps keep children from opening the door easily.
  • Weather resistance: Since patio doors face outdoor conditions, I look for rust-resistant finishes.

Security Level I Expect

I always ask myself how much protection I really need. If I want basic security, a simple latch or pin lock may be enough. If I want stronger protection, I look for a heavy-duty bar lock or a keyed lock. For me, the best choice is the one that makes forced entry much harder.

Installation and Maintenance

I prefer locks that are easy to install and do not damage my door frame. Once installed, I also check them regularly to make sure screws stay tight and moving parts still work smoothly. A lock is only useful to me if I keep it in good condition.

My Final Buying Advice

When I buy an additional lock for my patio door, I focus on fit, strength, and convenience. I do not want something complicated, but I also do not want to compromise on safety. For me, the right lock is one that gives extra protection, works well with my door, and is easy to use every day.

Final Thoughts

I’ve found that adding extra locks to patio doors is one of the simplest ways to improve home security and peace of mind. My main takeaway is that the right lock can add an important layer of protection without making the door harder to use every day. Whether I choose a sliding bolt, foot lock, or keyed option, the best solution is the one that fits my door and my security needs.

Author Profile

Elliot Mercer
Elliot Mercer
Elliot Mercer is the writer behind firstunitedethanol.com, based in Macon, Georgia. Years around stockrooms, shelves, delivery carts, and practical customers shaped the way he looks at everyday products.

He pays attention to how things hold up in real use, especially around the home, garage, yard, car, and daily routine. Heat, rain, storage, weak handles, confusing instructions, and cheap materials are the kinds of details he notices before recommending anything.

Through firstunitedethanol.com, Elliot shares honest first-person product thoughts based on use, comparison, research, and ordinary needs. His goal is to help readers understand what is worth buying, what is only almost useful, and what may become one more thing to deal with.