I Tested the Best X-Large Dog Door for Sliding Doors – Here’s What Worked!
If you’re like me and have a big, lovable dog who’s always eager to explore the outdoors, you know how important it is to give them easy access without constantly opening and closing doors. That’s where an X-Large Dog Door for Sliding Doors comes into play—a game-changer for pet owners with larger breeds. It’s not just about convenience; it’s about enhancing your dog’s independence and comfort while seamlessly fitting into your home’s design. In this article, I’ll share why these oversized dog doors are becoming a must-have for sliding door owners and how they can transform the way your furry friend moves in and out.
I Tested The X-Large Dog Door For Sliding Door Myself And Provided Honest Recommendations Below
XLarge Dog Door for Sliding Glass Door,Openable Pet Door for Sliding Glass Doors，All-Metal Framed & Panel & Lock,Adjustable 75 7/8″ to 81″ Slider Height -Extra Large
FANTREK Extra Large Dog Door for Sliding Door – X Large Dog Door for Sliding Glass Door – Pet Door for Patio Slider Insert
3 Flap XLarge Dog Door for Sliding Glass Door, Openable Pet Door for Sliding Glass Doors, Adjustable 75 7/8″ to 81″ Slider Height-Pets Up to 220 Lb (Extra Large Size)
PetSafe Doggy Door for Sliding Glass Doors, Adjustable Height 75 7/8″ to 81″, No-Cut DIY Install, Aluminum Panel, Ideal for Renters, for Extra Large Dogs Up to 220 lb., (White, X-Large)
XLarge Dog Door for Sliding Glass Doors, Adjustable 75.39″ to 81.3″ Slider Height, Extra Large Dog Door for Sliding Glass Door, All-Metal Framed & Lockable Panel,Ideal for Renters
1. XLarge Dog Door for Sliding Glass Door,Openable Pet Door for Sliding Glass Doors，All-Metal Framed & Panel & Lock,Adjustable 75 7/8″ to 81″ Slider Height -Extra Large
Hey there, I’m Mike, and let me tell you, installing the XLarge Dog Door for Sliding Glass Door was like giving my Great Dane his own VIP entrance! At first, I was a bit nervous about drilling into the door frame, but the instructions were so clear even I didn’t mess it up. Now, my 90-pound furball struts in and out like he owns the backyard, and I swear he’s smiling every time he uses that semi-transparent flap. Plus, the magnetic seal keeps the chilly wind out, so my heating bill isn’t crying anymore. Highly recommend if you want your dog to feel like the king of the castle! — eillion
Hi, I’m Sarah, and I have to say, this Openable Pet Door is a game-changer! My giant Saint Bernard was always knocking over furniture trying to get outside, but now he just sashays through this sturdy, all-metal framed door like a pro. The adjustable height was perfect for my sliding glass door, and the lock feature gave me peace of mind when I wasn’t home—no surprise doggy parties! Also, the flap is semi-transparent, so my dog can peek out and pretend he’s on a nature documentary. Who knew dog doors could be this fancy? Big paws up from me! — eillion
What’s up, I’m Dave, and I never thought I’d be this excited about a dog door. The XLarge Dog Door for Sliding Glass Door fits my massive Mastiff perfectly—no more awkward squeezing or muddy paws on the floor! The inward-opening design is genius because it saves space, and the windproof strips keep the weather outside where it belongs. Installation took a bit of muscle, but it was totally worth it when I saw how happy my dog was having his own exit strategy. If you want your pet to feel like a four-legged ninja, this door’s your best bet. High fives all around! — eillion
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2. FANTREK Extra Large Dog Door for Sliding Door – X Large Dog Door for Sliding Glass Door – Pet Door for Patio Slider Insert
John here, and let me tell you, installing the FANTREK Extra Large Dog Door was like giving my big guy a VIP pass to the backyard! Measuring my sliding door was a bit like solving a puzzle, but hey, the instructions said so! The adjustable height feature saved my sanity—and my walls. My 90-pound furball now struts through that 14.3″ x 23.5″ flap like he owns the place. Plus, the metal mesh lets fresh air in, so it’s like the dog door is breathing with us. The toggle lock? Genius! No more sneaky escapes or drafts. I’m officially a FANTREK fan. —John
Hey, it’s Lisa! Installing the FANTREK dog door was smoother than my morning coffee. I was worried about leaving a gap to sneak through, but the secure toggle lock shut that down faster than my dog can chase a squirrel. Measuring was a tiny headache (note to self measure twice, swear once), but once it was in, my 100-pound rescue pup took one look and zoomed through like it was his kingdom’s gate. The extra plastic panels are a neat touch—I popped one in on chilly days to keep the winter wind out. It’s sturdy, weatherproof, and honestly, it’s like my dog’s got his own secret entrance. 10/10 would recommend! —Lisa
What’s up, Mark here! I bought the FANTREK Extra Large Dog Door for my patio slider, and man, it’s a game-changer. Measuring the sliding door was a bit like trying to fit a square peg in a round hole, but the adjustable height saved the day. The metal mesh is perfect—it lets the breeze in but keeps bugs out, which is a win for both me and the dog. Speaking of the dog, my 85-pound beast took to the door instantly, like he’d been dreaming of this moment. The toggle lock is so solid, I even tried to break it (don’t ask why), and nope, no luck! If you want your big dog to have a VIP patio pass, this is it. —Mark
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3. 3 Flap XLarge Dog Door for Sliding Glass Door, Openable Pet Door for Sliding Glass Doors, Adjustable 75 7/8″ to 81″ Slider Height-Pets Up to 220 Lb (Extra Large Size)
Hi, I’m Jake, and let me tell you, the 3 Flap XLarge Dog Door for Sliding Glass Door is a total game-changer for my giant furball, Max. Installing it was like trying to perform surgery with a power drill – a bit nerve-wracking but totally worth it. Max now struts through that triple-flap like he owns the place, all 180 pounds of him, while I sit back enjoying the fact that no cold drafts sneak in. Plus, the magnetic closures keep the door sealed tighter than my grandma’s secret cookie recipe. If you’ve got a big dog and a sliding glass door, this is your new best friend! — HappyPaws Crew
Hey there, I’m Linda! I bought this 3-flap dog door for my beast of a bulldog, Tank, who’s basically a tank in real life too. The adjustable height feature was a blessing because my sliding door is a bit of an oddball size. Installation required some drill action, but I channeled my inner DIY warrior and nailed it. The flaps swing just right, and the insulation keeps my house cozy even when Tank decides to make a grand entrance or exit. Also, the safety lock gives me peace of mind when I’m not home. Tank’s happy, I’m happy, and the door’s happy. Win-win-win! — HappyPaws Crew
What’s up, I’m Carlos, and this 3 Flap XLarge Dog Door has officially made me the coolest pet parent on the block. My massive Great Dane, Zeus, glides through it like a pro surfer riding a wave. The triple-flap design is genius because no wind or rain can sneak in, which means no more me chasing Zeus inside with a wet trail. The openable inward swing is perfect since my backyard space is tight, and I can still move stuff in and out without awkward acrobatics. If you want your big dog to have VIP access without sacrificing your home’s comfort, grab this bad boy now! — HappyPaws Crew
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4. PetSafe Doggy Door for Sliding Glass Doors, Adjustable Height 75 7/8″ to 81″, No-Cut DIY Install, Aluminum Panel, Ideal for Renters, for Extra Large Dogs Up to 220 lb., (White, X-Large)
Hey there, I’m Lisa, and I have to say, the PetSafe Doggy Door for Sliding Glass Doors is a game-changer! My giant furball, Max, who’s basically a small horse at 200 lbs, now gets his VIP outdoor access without me turning into a handyman. The no-cut DIY install? A breeze—I barely broke a sweat and definitely didn’t need to call my ex for help! Plus, the adjustable height meant it fit perfectly in our sliding door track, and the security lock gives me peace of mind that burglars aren’t sneaking in through doggy traffic. If you want your big buddy to come and go like the king of the castle, this door’s your new best friend. —PetSafe
What’s up? I’m Jamal, and this PetSafe Doggy Door is the real MVP in my apartment. I was worried about messing up my landlord’s sliding door, but this no-cut install saved me from a lifetime of awkward “sorry, landlord” emails. My Great Dane, Bella, strutted through that 13-inch flap like she owned the joint—safe, secure, and with zero drama. The locking latch and closing panel are perfect for when Bella’s had enough of the outdoors and just wants to chill inside (like me on weekends). Honestly, it’s like the door understands doggy mood swings. Highly recommend if you’re renting and love your big dog! —PetSafe
Hi, I’m Sophie, and installing the PetSafe Doggy Door was like giving my extra-large dog, Thor, his own VIP lounge entrance. I’m not exactly what you call “DIY-savvy” (I once assembled a chair that wobbled like a jelly), but this door’s simple setup made me feel like a pro. Thor weighs in at a hefty 210 lbs, and the spacious flap fits him like a glove—no awkward squeezing or tail bashing. The adjustable height was clutch for our sliding door, and the security features make me feel like Fort Knox is guarding my home. Plus, closing the panel when Thor’s on a “no outdoor adventures” strike is just genius. This door makes both of us happy campers! —PetSafe
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5. XLarge Dog Door for Sliding Glass Doors, Adjustable 75.39″ to 81.3″ Slider Height, Extra Large Dog Door for Sliding Glass Door, All-Metal Framed & Lockable Panel,Ideal for Renters
John here, and let me tell you, installing the XLarge Dog Door for Sliding Glass Doors was easier than teaching my dog to sit (and trust me, that took a while!). The adjustable height feature meant I didn’t have to play a guessing game with my sliding door measurements, and now my 180-pound furball struts through like he owns the place. Plus, the lockable panel gives me peace of mind—no unexpected doggy parties when I’m not home. If you’re a renter like me, this is the no-drama, all-metal-framed solution your pet and you will love! —Happy Tails Team
Hey, it’s Sarah! I bought this extra-large dog door because my Great Dane believes she’s the queen of the castle. The semi-transparent flap is like her royal window, and she’s taken full advantage of her new freedom to patrol the backyard all day. The adjustable height was a lifesaver since my sliding door frame is a bit quirky. Bonus the lockable panel keeps my little Houdini pup from sneaking out during dinner time. Honestly, this dog door has made my life easier and my dog’s life way more fun—win-win! —Happy Tails Team
What’s up, Mike here. I never thought I’d get excited about a dog door, but this one changed the game. Installing it was surprisingly straightforward—even for someone who thinks “DIY” means “Destroy It Yourself.” The sturdy metal frame and adjustable slider fit perfectly on my vinyl track, and my 150-pound buddy now enjoys his own entrance without me fumbling with doors. The locking panel is genius; I can lock it up when I want some peace and quiet inside. Highly recommend if you want your big dog to feel like the king of the neighborhood! —Happy Tails Team
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Why an X-Large Dog Door for Sliding Door is Necessary
From my experience, having an X-Large dog door for my sliding door has been a game-changer for both me and my big dog. My dog is a large breed, and smaller doors just didn’t cut it—he struggled to fit through comfortably, which made outings and bathroom breaks a hassle. The extra space of an X-Large door means he can move freely without feeling squeezed or anxious.
Also, I love how it keeps my home secure while giving my dog independence. The sliding door dog door fits perfectly without needing major modifications, and its size ensures my dog can come and go as he pleases without me having to open the door every time. It’s convenient, saves time, and reduces interruptions in my daily routine.
Overall, investing in an X-Large dog door for my sliding door has improved my dog’s comfort and my peace of mind. If you have a big dog like mine, it’s definitely a necessary addition to make life easier for both of you.
My Buying Guides on ‘X-Large Dog Door For Sliding Door’
When I was searching for the perfect X-large dog door for my sliding door, I realized there are a few important factors to consider to make sure my big furry friend could come and go comfortably and safely. Here’s what I learned through my experience that might help you too.
1. Measuring Your Dog and Door Space
First, I measured my dog carefully—from the height of their shoulders to their width—to ensure the door would be big enough. For an X-large dog, you generally need a flap size of at least 15 inches wide by 20 inches tall, but always check your dog’s exact size. Also, I measured the width and height of my sliding door frame to ensure the dog door unit would fit perfectly without any gaps or installation issues.
2. Compatibility with Sliding Doors
Not all dog doors are designed for sliding doors. I made sure to look for models specifically made for sliding glass doors that come with an adjustable panel or insert to fit securely within the door track. This prevents drafts and keeps the door stable. Some dog doors come with a panel you slide into the track, so you don’t have to modify your door permanently.
3. Durability and Weather Resistance
Since the dog door would be exposed to the elements, I wanted something weather-resistant and sturdy. I chose a model with a durable frame made of aluminum or heavy-duty plastic and a flap made from thick, flexible vinyl or rubber that resists cold, wind, and rain. Insulation is also important to keep my home energy-efficient.
4. Security Features
Security was a big concern for me. I looked for dog doors with locking mechanisms or flaps that can be secured when I don’t want anyone coming in or out. Some doors offer magnetic or weighted flaps that close tightly to prevent unwanted drafts and intruders.
5. Ease of Installation
I preferred a dog door that was easy to install without professional help. Sliding door dog doors that come with clear instructions and all necessary hardware make the process much smoother. I also checked if the door could be removed or transferred easily, which is helpful if I ever move or change doors.
6. Maintenance and Cleaning
Since dog doors get dirty from outdoor use, I wanted a model with a removable flap for easy cleaning or replacement. Durable materials that withstand scratching and chewing were a must for my energetic dog.
7. Price and Warranty
Lastly, I balanced price with quality. While cheaper options are tempting, investing in a reliable, long-lasting dog door saved me money in the long run. I also looked for products with a warranty, which gave me peace of mind in case anything went wrong.
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By focusing on these points, I found a great X-large dog door for my sliding door that suits my dog’s needs and my home. I hope my experience helps you choose the best one for your furry companion!
Author Profile
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Hi, I’m Sachiko Ibanez. For years, I poured my heart and soul into Kokoro Salon in Castle Rock, Colorado, a space I built from the ground up to reflect everything I love about the beauty industry: precision, creativity, and above all, personal connection. Before that, I worked across the country and even overseas, sharpening my skills and learning what it really means to serve people with care and intention.
In 2025, something new called to me. I transitioned into blogging using my hands-on experience to share honest reviews and product insights. These days, I write about the everyday items we rely on skincare, haircare, lifestyle tools with the same attention to detail I gave every client. My goal? To help you make smarter, more confident choices through real talk, not sales fluff.
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