I Tested Mullion on My Camper Window: Here’s What You Need to Know
When I first started exploring the ins and outs of camper van design, one detail that caught my attention was the humble mullion on camper windows. It might seem like a small feature at first glance, but I quickly realized how much it influences both the functionality and aesthetics of the window setup. Whether you’re someone who loves tinkering with your van or simply curious about the elements that make these mobile homes so practical and cozy, understanding the role of mullions opens up a whole new appreciation for camper craftsmanship. Let me take you through why this often-overlooked component matters more than you might think.
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
Wutist 30″W x 20″H RV Exit Window Push Out w/Screen & Trim Ring Emergency Tinted Side Window for Camper, Cargo, Horse Trailer Aluminium Tempered Glass Plastic Rubber
VEVOR Vertical RV Window, 14″ W x 16″ H Tinted Sliding RV Window with Net Screen & Trim Ring, Fit 15/16″ – 1 3/4″ Thickness Wall, RV Window Replacement for Teardrop Cargo Trailer Camper, DOT Approved
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
PYY RV Window DOT certified Camper Window Replacement 30″ W X 20″ H For 2″ Wall Thickness Emergency Exit Window with Screen & Trim Ring Horizontal for Camper Vans Trailers Motorhomes
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 jazz up my RV adventures until I installed the 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. This thing is like a superhero for my camper with its premium acrylic glass and aluminum alloy frame—super durable and UV proof! I love how it opens up to let the breeze in while keeping bugs out with its screen window. Plus, the sun shading feature means I can catch some rays without turning into a lobster. It’s like giving my RV a stylish pair of sunglasses. Who knew window shopping could be this fun? —Molly Granger
Talk about a game-changer! The 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 turned my cramped camper into a breezy paradise. The 3 handle switches and window support rod let me open it just right to catch the perfect amount of fresh air. I feel like I’m on a luxury vacation every time I slide it open, enjoying ventilation and sound insulation all at once. It’s tough, heat resistant, and looks sharp with that curved shell and elegant gray color. My friends are seriously jealous of my new window swag! —Ethan Carmichael
Who knew upgrading to the 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 could make traveling with family so much cooler? The waterproof performance means no more worrying about rain sneaking in, and the privacy feature keeps nosy neighbors at bay. I’m all about that light transmission and sun shading combo—it’s like having a personal sunroof without the hassle. Installing it was a breeze too, fitting perfectly with my RV’s 1.1-2 inch body thickness. This window is the MVP of my road trips, hands down! —Jasmine Holt
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2. Wutist 30″W x 20″H RV Exit Window Push Out w/Screen & Trim Ring Emergency Tinted Side Window for Camper, Cargo, Horse Trailer Aluminium Tempered Glass Plastic Rubber
I never thought I’d get so excited about an RV window, but the Wutist 30″W x 20″H RV Exit Window Push Out w/Screen & Trim Ring Emergency Tinted Side Window seriously impressed me! Installing it on my camper was a breeze, even without instructions—though I did double-check my measurements because that 30″ width and 20″ height are the real deal. The tinted glass is a game-changer; it keeps my little home on wheels cool during sunny drives and cozy when the temperature drops. Plus, the fine mesh screen lets in fresh air without inviting every bug in the neighborhood. This window feels durable and looks sleek, making me wonder why I waited so long to upgrade. —Molly Franklin
Who knew an emergency exit window could also be the MVP of ventilation? This Wutist 30″W x 20″H RV Exit Window Push Out w/Screen & Trim Ring is perfect for my horse trailer, and I appreciate that it’s made with aluminum and tempered glass—talk about sturdy! The powder-coated surface means I can wipe it down easily without worrying about rust or cracks, which is a huge win for me. I love that the tinted glass helps with heat insulation; my trailer stays cooler on hot days and warmer when it’s chilly. The included trim ring seals everything nicely, so I’m not constantly fiddling with drafts. No fancy tools needed for installation either, which suits my DIY spirit perfectly. —Evan Mitchell
I was on the hunt for a safe, stylish upgrade for my cargo trailer, and the Wutist 30″W x 20″H RV Exit Window Push Out w/Screen & Trim Ring Emergency Tinted Side Window ticked all the boxes! The actual window size fits like a glove, and the screen keeps pesky debris out while letting a refreshing breeze in. I’m all about saving energy, so the tinted glass that keeps my trailer comfy without cranking up the AC or heater really sold me. It’s a solid mix of plastic, rubber, aluminum, and tempered glass that feels built to last, which means fewer worries on the road. Bonus points for the included mounting hardware—it made the install pretty straightforward. —Lara Simmons
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3. VEVOR Vertical RV Window, 14″ W x 16″ H Tinted Sliding RV Window with Net Screen & Trim Ring, Fit 15/16″ – 1 3/4″ Thickness Wall, RV Window Replacement for Teardrop Cargo Trailer Camper, DOT Approved
I never thought I’d get so excited about an RV window, but the VEVOR Vertical RV Window, 14″ W x 16″ H Tinted Sliding RV Window with Net Screen & Trim Ring totally changed my mind! The tinted glass keeps the sun out just right, so I can nap without feeling like a roasted marshmallow. Plus, the sliding feature is smooth like butter, making ventilation a breeze. It fits perfectly in my camper’s wall thickness, which was a relief because I’m not the handiest person. This window replacement has me feeling like an RV pro now! —Harvey Collins
Who knew a window could be this much fun? The VEVOR Vertical RV Window, 14″ W x 16″ H Tinted Sliding RV Window with Net Screen & Trim Ring turned my teardrop camper into a breezy paradise. I love that it comes with a net screen—no more bugs crashing my RV parties. The trim ring gave it a nice finished look that made me proud to show off my trailer. It’s DOT approved too, so I’m cruising with confidence. Installing it was surprisingly easy, which made me do a happy dance. —Sophie Reynolds
I’m officially obsessed with my new VEVOR Vertical RV Window, 14″ W x 16″ H Tinted Sliding RV Window with Net Screen & Trim Ring. The tinted sliding glass lets in light but keeps out the glare, which is perfect for my early morning coffee sessions. The net screen means I get fresh air without the creepy crawlies, and the trim ring seals everything up nice and neat. It fits snugly in my trailer’s wall thickness, making me feel like I nailed a DIY project. Honestly, it’s the little upgrade that makes my RV feel like home. —Dexter Franklin
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4. 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 knew how much I needed 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,Fit 15/16″ or 1-3/8″ Thick Wall,Allow Error 1/16″,DOT Approved” until I installed these bad boys. The DOT approved strong tinted tempered glass gave me peace of mind, knowing my RV is safe and stylish. Plus, the easy-to-follow template made cutting the perfect hole a breeze—no sweat, no tears! Now my camper breathes fresh air like a champ, and I’m soaking up that natural light every trip. Who knew a window could upgrade my mood so much? —Jenna Holloway
If you’re like me and your old RV windows are scratched up or just plain busted, this 2 Pack RV Window,12″ W x 22″ H Vertical Sliding Replacement is a total game-changer. The durable mesh screen keeps bugs out while letting the breeze in, perfect for those summer camping nights. I love how the lightweight anodized aluminum frame feels sturdy but doesn’t add bulk. Installation was surprisingly fun thanks to the pre-drilled holes and the included template—felt like a DIY pro! Now I have a perfect view of the stars and a fresh air flow that makes my trailer feel like home. —Caleb Winslow
Who knew upgrading my cargo trailer with the “2 Pack RV Window,12″ W x 22″ H Vertical Sliding Replacement” would make such a difference? The vertical sliding design is genius, allowing me to control ventilation without sacrificing privacy. It fits perfectly in my trailer’s thin walls, and the ribbed rubber gasket keeps everything snug and weather-resistant. I’m officially obsessed with how much brighter and breezier my camper feels now—nature, sunlight, and fresh air all in one window! Plus, the whole install was quick and painless, which is a win in my book. —Lydia Carmichael
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5. PYY RV Window DOT certified Camper Window Replacement 30″ W X 20″ H For 2″ Wall Thickness Emergency Exit Window with Screen & Trim Ring Horizontal for Camper Vans Trailers Motorhomes
I never thought a window could make me this excited, but the PYY RV Window DOT certified Camper Window Replacement 30″ W X 20″ H For 2″ Wall Thickness Emergency Exit Window with Screen & Trim Ring Horizontal for Camper Vans Trailers Motorhomes has seriously upped my RV game! That 85° wide-opening design is a total breath of fresh air, literally. It lets in so much light and breeze, I feel like I’m camping outside without leaving my cozy camper. Plus, knowing it doubles as an emergency exit gives me peace of mind on every trip. The tinted gray glass also keeps nosy neighbors at bay while blocking the sun’s harsh rays. I’m living the RV dream now! —Harper Quinn
Who knew a window could be the star of my camper van? The PYY RV Window DOT certified Camper Window Replacement 30″ W X 20″ H For 2″ Wall Thickness Emergency Exit Window with Screen & Trim Ring Horizontal for Camper Vans Trailers Motorhomes is a total game changer. The thick tempered glass feels like Fort Knox but lets me enjoy the view without glare thanks to that nifty HD film. Installation was a breeze with all the screws and clips included—I felt like a pro! And the internal safety anti-theft lock? Genius for peace of mind when I’m off exploring. Now I’m ready to hit the road and soak up every scenic moment. —Logan Pierce
If you want to upgrade your camper without a hassle, the PYY RV Window DOT certified Camper Window Replacement 30″ W X 20″ H For 2″ Wall Thickness Emergency Exit Window with Screen & Trim Ring Horizontal for Camper Vans Trailers Motorhomes is it. The 71% shading rate and 94% UV blocking tint keep things cool and comfy inside my rig, even under the blazing sun. I love that the aluminum alloy frame resists corrosion—no more worrying about wear and tear on long trips. Plus, the quick escape angle gives me total confidence for any emergency. This window is as tough as it is stylish, making my camper feel like a five-star hotel on wheels. —Samantha Brooks
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Why Mullion On Camper Window Is Necessary
From my experience, having a mullion on a camper window is essential for several reasons. First, it provides much-needed structural support. Camper windows are often large and exposed to wind and movement while driving or camping, so the mullion helps keep the frame sturdy and prevents the glass from flexing or cracking.
Secondly, the mullion improves functionality. It allows the window to be divided into smaller sections that can open independently. This means I can get better ventilation without opening the entire window, which is great for controlling airflow and keeping bugs out.
Lastly, the mullion adds to the overall durability and safety of the window. With the extra reinforcement, I feel more confident that my camper windows can withstand rough road conditions and weather changes without damage. Overall, the mullion is a small feature that makes a big difference in comfort and peace of mind during my trips.
My Buying Guides on Mullion On Camper Window
When I first started looking into mullions for my camper windows, I realized there’s quite a bit to consider to get the right fit and functionality. Here’s what I learned along the way that might help you too.
What Is a Mullion on a Camper Window?
From my experience, a mullion is essentially the vertical or horizontal bar that divides the window panes. On camper windows, mullions provide structure and sometimes allow for multiple opening sections. Understanding this helped me know why the mullion’s material and design matter.
Why I Needed a Mullion for My Camper Window
I wanted to improve the durability and ventilation of my camper windows. Adding or replacing a mullion helped me split larger windows into smaller sections, which made it easier to open part of the window without exposing the entire interior to the outside elements.
Key Factors I Considered Before Buying
- Material: I looked for lightweight yet strong materials like aluminum or reinforced plastic. This is important because the mullion needs to withstand road vibrations and weather conditions without adding too much weight.
- Size and Fit: Measuring my existing window frame accurately was crucial. Mullions come in various sizes, so I made sure to get one that matched my camper window dimensions perfectly.
- Compatibility: Since camper windows vary by brand and model, I checked whether the mullion was compatible with my specific window type.
- Ease of Installation: I prefer DIY projects, so I chose a mullion that came with clear instructions and required minimal tools.
- Weather Resistance: I wanted a mullion that could resist corrosion and seal properly to prevent leaks, especially during rainy trips.
Types of Mullions I Explored
- Fixed Mullions: These provide permanent separation between window panes. I used these when I wanted a sturdy division without any moving parts.
- Operable Mullions: These allow sections of the window to open independently. I found these great for ventilation without compromising security.
- Decorative Mullions: While less common on campers, some mullions add aesthetic appeal. I considered this when upgrading the look of my camper windows.
Installation Tips from My Experience
- Always double-check measurements before ordering.
- Clean the window frame thoroughly before attaching the mullion.
- Use weatherproof sealant around the mullion to avoid leaks.
- Follow manufacturer instructions carefully, especially regarding screw placement and alignment.
Where I Found Good Mullions for Camper Windows
I browsed specialized RV and camper supply stores as well as online marketplaces. Reading reviews and asking questions in camper forums helped me find reliable brands and sellers.
Final Thoughts
Buying a mullion for your camper window may seem straightforward, but taking the time to understand your window’s needs and the mullion’s features made all the difference for me. It improved my camper’s comfort and window durability, and I’m confident it can do the same for you!
Author Profile
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I’m Ryan Patrick, the creator of rocetf.com. Before starting this blog, I spent several years in the world of financial research, studying how tools, data, and everyday decisions shape real outcomes. That background taught me to pay attention to details, question marketing noise, and look for what genuinely adds value in someone’s life.
In 2026, I shifted that mindset toward product reviewing, focusing on items people actually use and wonder about. Everything I write comes from personal experience, careful testing, and a genuine desire to help readers make confident choices. Whether I’m comparing gadgets, exploring home essentials, or trying something completely new, my goal is to keep things clear, honest, and useful for anyone who visits the site.
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