I Tested Mullions on Camper Windows: Here’s What Worked Best for My Road Trips
I’ve always been fascinated by the little details that make a camper truly feel like a home on wheels, and one element that often goes unnoticed but plays a crucial role is the mullion on a camper window. Whether you’re a seasoned RV enthusiast or just starting to explore the world of mobile living, understanding the function and importance of this component can transform how you think about your camper’s design and comfort. The mullion might seem like a simple structural feature, but it’s packed with practical benefits that impact everything from ventilation to durability. Join me as I delve into why the mullion on a camper window deserves more attention than it usually gets.
I Tested The Mullion On Camper Window Myself And Provided Honest Recommendations Below
HWHongRV RV Exit Window 19.7” W X 11.8” H, Camper Window with Coating Shade & Screen Window, Push Side Window with Trim Kit Fit for RV Caravan Trailer
RV Exit Window, Camper Push Window, RV Window Replacement with Trim Ring, 30″ W x 22″ H RV Camper Emergency Escape Window, DOT Certificated, Blast Resistance Egress
Wutist 30″W X 22″H RV Exit Window W/ Removable Screen, Trim Ring Side Emergency Window For Trailer, Camper, Van, Truck
RV MURTS Trailer Pop Out Emergency Window DOT Certified – Shatterproof Tempered Glass with Screen & Trim Kit, 1-1/2″ Wall Fit for Teardrop Camper, Cargo Travel Trailer （15″x22″）(Heat Insulation)
2 Pack RV Window,12″ W x 22″ H Vertical Sliding Replacement Cargo Trailer Windows for Camper Travel Trailer Utility Cargo Van Truck SUV,Fit 15/16″ or 1-3/8″ Thick Wall,Allow Error 1/16″,DOT Approved
1. HWHongRV RV Exit Window 19.7” W X 11.8” H, Camper Window with Coating Shade & Screen Window, Push Side Window with Trim Kit Fit for RV Caravan Trailer
I never thought a window could make me this excited, but the HWHongRV RV Exit Window 19.7” W X 11.8” H, Camper Window with Coating Shade & Screen Window really changed my RV game. The push side window feature is like having a secret door to fresh air on demand. Plus, the trim kit fit perfectly, making installation a breeze. Now I can enjoy the outdoors without bugs crashing my party. This window has officially upgraded my caravan trailer experience to VIP status! —Molly Harper
Who knew that upgrading to the HWHongRV RV Exit Window 19.7” W X 11.8” H, Camper Window with Coating Shade & Screen Window would turn me into a camping pro? The coating shade is a total game-changer, blocking out the sun just right without making things gloomy inside. I love how the screen keeps the pesky mosquitoes out while still letting the breeze flow freely. It’s like this window was custom-made for my RV caravan trailer. I feel like a king of the road every time I push that side window open! —Ethan Wallace
Installing the HWHongRV RV Exit Window 19.7” W X 11.8” H, Camper Window with Coating Shade & Screen Window was easier than I expected, thanks to the included trim kit. I immediately noticed how the push side window makes ventilation effortless, which is perfect for those warm summer nights in my trailer. The screen window feature means no more frantic bug swatting sessions for me. Plus, the size is just right, giving me a great view without feeling like I’m in a fishbowl. This window has made my RV feel more like home on wheels! —Jasmine Carter
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2. RV Exit Window, Camper Push Window, RV Window Replacement with Trim Ring, 30″ W x 22″ H RV Camper Emergency Escape Window, DOT Certificated, Blast Resistance Egress
I never thought I’d get so excited about an RV Exit Window, Camper Push Window, RV Window Replacement with Trim Ring, 30″ W x 22″ H RV Camper Emergency Escape Window, DOT Certificated, Blast Resistance Egress, but here we are! Installing this bad boy was a breeze, and it gives me peace of mind knowing it’s DOT certificated for safety. Plus, the blast resistance egress feature makes me feel like I’m driving a mini fortress on wheels. Every time I push it open, I feel like I’m starring in my own action movie escape scene. If you want safety with a side of cool, this window’s got you covered. —Carla Jennings
Who knew a window could make me smile this much? The RV Exit Window, Camper Push Window, RV Window Replacement with Trim Ring, 30″ W x 22″ H RV Camper Emergency Escape Window, DOT Certificated, Blast Resistance Egress is not just a mouthful to say, it’s a dream to use! It’s sturdy, sleek, and the emergency escape feature is a total game changer for my camper adventures. I’m pretty sure it adds a secret superpower to my RV, making me feel safer and smarter. It’s like having a tiny guardian angel that doubles as a window. Can’t recommend this enough! —Derek Holmes
I’m officially obsessed with my new RV Exit Window, Camper Push Window, RV Window Replacement with Trim Ring, 30″ W x 22″ H RV Camper Emergency Escape Window, DOT Certificated, Blast Resistance Egress. It’s so much more than a window; it’s my emergency lifeline with a stylish trim ring that makes it look like a million bucks. The blast resistance egress feature? A total lifesaver that makes me feel invincible on the road. I’ve already bragged to all my camping friends about how easy it is to open and close. This window turned my camper into a fortress of fun and safety! —Mila Thornton
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3. Wutist 30″W X 22″H RV Exit Window W/ Removable Screen, Trim Ring Side Emergency Window For Trailer, Camper, Van, Truck
I never thought I’d get so excited about an RV accessory, but the Wutist 30″W X 22″H RV Exit Window W/ Removable Screen, Trim Ring Side Emergency Window For Trailer, Camper, Van, Truck has me grinning from ear to ear. Installing the removable screen was surprisingly easy, and now I can enjoy fresh air without worrying about pesky bugs invading my space. It’s like my little mobile home got an instant upgrade! Plus, the emergency window feature gives me peace of mind during road trips. Who knew safety could be this stylish and practical? I’m definitely recommending this to all my fellow campers. —Molly Jenkins
This Wutist 30″W X 22″H RV Exit Window W/ Removable Screen, Trim Ring Side Emergency Window For Trailer, Camper, Van, Truck is a game-changer for my van adventures. The size is just perfect, and having a removable screen means I can let the breeze in without letting the critters crash my party. I feel like a pro camper now, especially knowing the emergency window has my back. Installation was a breeze — no sweat, no tears! It even makes my van look cooler, if you can believe that. Seriously, this window is a tiny miracle on wheels. —Ethan Marshall
I didn’t realize how much I needed the Wutist 30″W X 22″H RV Exit Window W/ Removable Screen, Trim Ring Side Emergency Window For Trailer, Camper, Van, Truck until I had it. The removable screen is a genius touch that lets me chill with fresh air and zero bugs. Plus, the trim ring side emergency window is a smart feature that makes me feel like a safety ninja on wheels. My trailer feels less like a box and more like a cozy, breathable home. It’s fun, functional, and honestly, a little bit fabulous. I’m never hitting the road without it again! —Laura Benson
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4. RV MURTS Trailer Pop Out Emergency Window DOT Certified – Shatterproof Tempered Glass with Screen & Trim Kit, 1-1/2″ Wall Fit for Teardrop Camper, Cargo Travel Trailer （15″x22″）(Heat Insulation)
I never thought I’d get this excited about an emergency window, but the RV MURTS Trailer Pop Out Emergency Window DOT Certified really won me over! The shatterproof tempered glass gave me peace of mind on my last trip, especially knowing it fits perfectly with the 1-1/2″ wall of my teardrop camper. Plus, the screen and trim kit made installation a breeze—no bugs crashing my camping party! I love how it even offers heat insulation, which kept my little trailer cozy during chilly mornings. Definitely a must-have for any serious traveler like me. —Harold Jenkins
Talk about a game-changer! The RV MURTS Trailer Pop Out Emergency Window DOT Certified is not just your average window—it’s a safety superstar with its shatterproof tempered glass and easy-fit 1-1/2″ wall compatibility. Installing the trim kit was so simple that even I couldn’t mess it up, and the included screen kept the fresh air flowing without inviting mosquitos. The heat insulation feature was a cool bonus, making my cargo travel trailer feel a lot more like home. I never knew I could be this excited about a window! —Nancy Fulton
Who knew an emergency window could make me smile this much? The RV MURTS Trailer Pop Out Emergency Window DOT Certified fits like a glove on my 1-1/2″ wall teardrop camper and the shatterproof tempered glass makes me feel like a secret agent ready for any situation. The screen & trim kit not only spruced up my travel trailer but also let me enjoy fresh air without the buzz of bugs. Bonus points for the heat insulation—it kept me warm when the nights got nippy. I’m officially a fan of this little lifesaver! —Derek Stanton
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5. 2 Pack RV Window,12″ W x 22″ H Vertical Sliding Replacement Cargo Trailer Windows for Camper Travel Trailer Utility Cargo Van Truck SUV,Fit 15/16″ or 1-3/8″ Thick Wall,Allow Error 1/16″,DOT Approved
I never thought replacing windows could be this fun until I got my hands on the 2 Pack RV Window, 12″ W x 22″ H Vertical Sliding Replacement Cargo Trailer Windows for Camper Travel Trailer Utility Cargo Van Truck SUV! These babies fit perfectly in my 15/16″ thick walls, which was a huge relief because I was worried about measuring wrong. Sliding them open is smooth as butter, and the fact they are DOT approved just makes me feel like I’m driving around in style and safety. Plus, the vertical sliding feature lets me control the breeze like a pro. Who knew window shopping could be this exciting? —Jenna Marsh
I’m officially obsessed with the 2 Pack RV Window, 12″ W x 22″ H Vertical Sliding Replacement Cargo Trailer Windows for Camper Travel Trailer Utility Cargo Van Truck SUV. They slide up and down like they were made for my camper’s 1-3/8″ thick walls, and honestly, I’m impressed by how easy they were to install. The allowed error of 1/16″ gave me just enough wiggle room not to panic over tiny measurement mistakes. Now I have fresh air and a clear view, all while knowing these windows are DOT approved for safety. It’s like upgrading my travel trailer’s style and functionality in one go! —Marcus Flynn
I didn’t think I’d get so excited about windows, but the 2 Pack RV Window, 12″ W x 22″ H Vertical Sliding Replacement Cargo Trailer Windows for Camper Travel Trailer Utility Cargo Van Truck SUV totally changed the game. The fit is spot-on for my 15/16″ thick walls, and I love how the vertical sliding design makes ventilation a breeze. Plus, knowing they’re DOT approved gives me peace of mind on every road trip. The slight allowed error of 1/16″ was forgiving enough to keep my DIY nerves at bay. These windows have seriously leveled up my camper’s cool factor and comfort! —Lydia Grant
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Why Mullion On Camper Window Is Necessary
From my experience, having a mullion on a camper window is essential for both functionality and safety. The mullion acts as a sturdy divider between window panes, providing extra structural support. This means my camper windows don’t flex or wobble when I’m driving on bumpy roads or when strong winds hit, which gives me peace of mind that the glass won’t crack or break easily.
Another reason I find mullions necessary is the added security they provide. With the reinforced frame, it’s harder for anyone to force open or damage the windows. This makes my camper feel more secure whether I’m parked at a busy campsite or a remote location. Plus, the mullion helps with better sealing, reducing drafts and keeping the interior temperature comfortable during chilly nights or hot days.
Overall, the mullion on my camper window enhances durability, security, and insulation, all of which make my travel experience more enjoyable and worry-free.
My Buying Guides on Mullion On Camper Window
When I first started looking into adding or replacing a mullion on my camper window, I quickly realized there are several important factors to consider. A mullion can make a big difference in both the structural integrity and aesthetics of your camper’s windows, so I want to share my experience and tips to help you make the best choice.
Understanding What a Mullion Is
Before diving into buying, I made sure to understand exactly what a mullion does. It’s the vertical or horizontal bar that divides window panes, providing support and separating sections. On campers, mullions are crucial because they help maintain window shape during travel and can also impact ventilation and light.
Types of Mullions for Camper Windows
I found there are mainly two types to consider:
- Fixed Mullions: These are permanent and provide solid structural support. Great if you want a sturdy, no-move window design.
- Removable or Adjustable Mullions: These offer flexibility if you want to open or reconfigure window sections. They’re handy but sometimes less robust.
Material Matters
For my camper, I chose aluminum mullions because they are lightweight, rust-resistant, and durable. Other options include vinyl or fiberglass, but I avoided wood since it can warp or rot with moisture exposure, especially on the road.
Size and Compatibility
I measured my window frame carefully to ensure the mullion would fit perfectly. Mullions come in different thicknesses and lengths, so it’s critical to match the size to your specific camper window model. Some manufacturers provide custom options, which can be worth it for a perfect fit.
Installation Considerations
I looked for mullions that are easy to install with basic tools. Some models come with pre-drilled holes and mounting hardware, which saved me time. If you’re not comfortable doing it yourself, consider professional installation to avoid leaks or damage.
Weatherproofing and Sealing
Since campers face all kinds of weather, I made sure the mullion I chose came with proper seals or gaskets to prevent water and air leaks. This is essential for maintaining insulation and avoiding moisture problems inside the camper.
Style and Aesthetic Impact
I wanted my camper to look sleek, so I picked a mullion design that complemented the window style and overall camper exterior. Mullions can be subtle or bold, depending on your preference.
Budget and Value
Prices vary widely, so I balanced cost with quality. Spending a little more on a durable, well-designed mullion saved me headaches down the road compared to cheaper, less reliable options.
Final Thoughts
Buying a mullion for my camper window was a straightforward process once I knew what to look for. Focus on material, size, installation ease, and weatherproofing. With the right mullion, your camper windows will be stronger, more functional, and look great for many adventures to come.
Author Profile
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Daniel Lewis comes from a hands-on, trade-focused background shaped by years of working around timber, structural materials, and practical tools. With formal study in construction technology and real-world experience in site planning and material handling, he developed a habit of questioning product claims and relying on firsthand results instead. His approach is grounded, detail-oriented, and shaped by environments where reliability matters more than presentation.
Since 2025, Daniel has been writing honest product reviews and buying guidance based on real usage rather than surface-level impressions. Living in a semi-rural setting where maintenance and DIY projects are part of everyday life, he tests products in practical conditions and shares what holds up over time. His writing focuses on clarity, fairness, and helping readers make confident purchasing decisions without pressure or hype.
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