A campervan window fitting is an absolute necessity! It brightens up the interior and improves ventilation by letting in fresh air. It is also a requirement in the UK by the DVLA when converting a vehicle into a campervan. In this guide I will show you how to very easily install a window in your van!
In our Roaming Home 2023 Study, we found that a window installation was by far the most common exterior modification done in a van conversion; 87% of people have a window installed in their van.
I’m Shane, a van conversion professional dedicated to helping people transform ordinary vans into homes on wheels. I've authored Roaming Home, and teach The Van Conversion Course, guiding many people through their van builds. I also write The Van Conversion Newsletter, where I share practical tips and insights. After completing two van builds and living on the road full-time since 2020, I’m excited to share my expertise with you.
Now let's jump in and have a look at van window installation!
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Index
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Supplies List 🛒
 | For driving and drilling | |
 | Primer, glue, pom poms | |
 | For protecting bare metal from rust | |
 | Window | |
 | For filing burrs on exposed metal | |
 | | |
 | |
Types of campervan window fitting
When it comes to choosing the right windows for your campervan, several factors need to be considered—ventilation, privacy, insulation, and budget. Below, we break down the most common types of campervan windows, their pros and cons, and how they affect the comfort and functionality of your van.
1. Fixed Windows
These windows do not open and are permanently sealed. They are the most common and simplest type, often chosen for aesthetic appeal.
Pros:
Excellent for natural light.
Provides good visibility for safety, especially when driving.
Less likely to leak due to a fixed seal.
Cons:
No ventilation.
Heat buildup can be an issue in summer.
2. Sliding Windows
Description: Sliding windows feature a movable panel that slides horizontally to allow airflow.
Pros:
Provides ventilation while maintaining security.
Great for areas where doors or other vents aren't feasible.
Easier to control airflow.
Cons:
Can leak if seals are not properly maintained.
Tends to be more expensive than fixed windows.
3. Awning Windows
Description: Awning windows are hinged at the top and open outward, forming an awning shape when open.
Pros:
Can stay open even in rain due to their awning shape.
Provides good airflow and ventilation.
Secure design with minimal risk of accidental closure.
Cons:
Higher cost compared to fixed or sliding windows.
Limited ventilation area compared to sliding windows.
4. Louvered (Jalousie) Windows
Description: Louvered windows consist of a series of horizontal glass or acrylic slats that open by tilting outward.
Pros:
Allows fine control over airflow.
Can be opened in bad weather due to angled slats.
Cons:
More complex and expensive.
Increased potential for leaks if not maintained well.
5. Pop-Out Windows
Description: These windows pivot outward on hinges, typically opening along the sides.
Pros:
Good ventilation without compromising on security.
Sleek and modern look.
Cons:
Smaller opening size limits airflow.
Higher cost and complexity of installation.
6. Double-Pane Windows
Description: Double-pane windows consist of two layers of glass with a layer of air (or gas) in between, providing enhanced insulation.
Pros:
Excellent thermal insulation—ideal for both hot and cold climates.
Great noise reduction.
Prevents condensation.
Cons:
Most expensive option.
Heavier, adding weight to the van.
Campervan Window Types: Detailed Comparison
Window Type | Price Range | Ventilation | Insulation | Waterproofing | Privacy | Ideal Climate |
Fixed Windows | €100-€250 | None | Poor | High | Low (without tint) | Moderate to cold |
Sliding Windows | €200-€350 | Good | Medium | Medium | Medium | Warm climates |
Awning Windows | €300-€500 | Medium (Rainproof) | Medium | High | Medium (with tint) | Rainy or humid climates |
Louvered Windows | €350-€600 | Excellent (fine control) | Low to Medium | Medium | Medium | Rainy, tropical climates |
Pop-Out Windows | €250-€450 | Medium | Medium | High | Medium | Temperate climates |
Double-Pane Windows | €500-€900 | Poor | Excellent | High | High | Extreme hot/cold climates |
Campervan window tint
When buying a campervan window fitting you have the option of buying a clear or tinted window. Van window tinting is important and a tinted window is generally recommended for campervans.
Benefits of van window tinting:
Ensures that nosy parkers can’t see any valuables inside the van.
Helps with keeping your van cool on warm summer days (keeps the sun out).
Preserves your vehicle interior. UV rays damage and discolour furniture over time.
Privacy when you are walking around your van naked. A common occurrence in my van.
How many campervan windows should I install?
The answer to this question largely depends on the location in which you live. It is important to understand that the window will be the biggest thermal bridge in your campervan. That is technical jargon for ‘your window is a really bad insulator and will transfer a lot of heat’.
In winter having a lot of windows is bad because your van will get very cold, especially at night. Even with the heater running, you will lose heat very quickly.
In summer having a lot of windows can also be bad as your van will get very hot during the day (unless you use window covers / shades).
As a general rule of thumb, if you only use your van in warm climates, you can afford to have more windows. If you use your van a lot in winter (like me), be sparing with your campervan windows!
I have one fixed window with 80% tint in my sliding door.
Campervan window fitting location
I recommend installing a window on the opposite side to the driver’s seat, towards the front of the van. This gives you visibility of one of your blind spots when you are turning; you can look through the window to see if there is oncoming traffic.
However you should also consider placing windows on the passenger side. In many countries, the passenger side is where you park along the curb. Installing windows here gives you a nice view of your surroundings while maintaining privacy on the driver’s side.
Consider installing a window near the rear of the vehicle to aid in reversing and backing into campsites. Some vanlifers also install a small window in the rear door for better rear visibility.
Campervan window covers
Before we hop into the van window installation, let's touch on campervan window covers first - something you will have to tackle at some stage.
On the cosmetic side, you can consider installing campervan curtains. Curtains will give you privacy and offer some insulating properties, primarily protection from the sun!
Because glass has one of the very worst e-values, it is imperative that we cover it up to slow the heat transfer. You need to consider window insulation. You can make DIY window covers by cutting some Reflectix and attaching some suction cups to the corners. As a winter vanlifer, I can tell you first hand the importance of window covers! Do it!
Else, you can purchase nice -premade windows from an online distributor.
Thermal Performance and Insulation
When selecting windows for your campervan, thermal performance is a crucial consideration, especially if you travel through varied climates. Windows are the weakest link in your van’s insulation, as glass is a poor insulator compared to walls. Understanding how different window types affect temperature control is key to keeping your van comfortable.
U-Values and Heat Transfer
U-value measures a window’s insulation ability—lower U-values mean better insulation. Single-pane windows have U-values around 5.0 W/m²K, while double-pane windows can go as low as 1.5-2.0 W/m²K, providing better thermal efficiency.
Double-Pane vs. Single-Pane
Double-pane windows: Insulate far better by using two layers of glass with insulating air or gas in between, reducing condensation and external noise.
Single-pane windows: Offer minimal insulation and are more prone to condensation and heat loss.
Tinted and Low-E Glass
Tinted windows can block 40-70% of solar heat gain, helping maintain a cooler interior.
Low-E glass reflects infrared light, keeping heat inside during winter and outside in summer, making it ideal for temperature regulation in all climates.
Insulated Window Covers
Adding Reflectix window covers or thermal shades can improve insulation and provide R-values between 1 and 2, helping minimize heat loss and condensation, especially in colder environments. Or you can buy some specialised insulated window covers online.
Condensation Control
Double-pane windows are more effective at reducing condensation, while insulated window covers further prevent cold surfaces from collecting moisture.
Window Thermal Performance Comparison
Window Type | U-Value (W/m²K) | Condensation Resistance | Heat Gain | Insulation Quality | Ideal Climate |
Single-Pane | 4.5 - 5.5 | Low | High | Low | Mild climates (cool/warm) |
Double-Pane | 1.5 - 2.0 | High | Low | Excellent | Extreme hot/cold climates |
Tinted Windows | Varies by tint level | Medium | Low | Medium (improved w/cover) | Hot climates |
Low-E Glass | 1.8 - 2.3 | High | Very Low | High | All climates (best for temperature control) |
How to install a campervan window fitting
To install a window in your van you will need a window bonding kit, these can be bought online.
The window bonding kit should contain the following;
Glass activator
Glass primer
Glue
Pom poms
Latex gloves
Step 1: Make a cardboard template
Get your hands on a large piece of cardboard and trace a light outline of the window onto it.
Then make another, thicker trace indented several inches on all sides. This will be the shape we need to cut in the side of the van. The indentation is needed so that we have enough room to glue the window to the van.
Note: This cardboard template typically comes with the window you have purchased.
Place the cardboard template over the location where you will fit the window. Temporarily stick it to the van with tape and trace around it with a sharpie.
Step 2: Drill pilot holes
Drill pilot holes around the traced line. Make sure you put a tarp on the floor inside the van to catch all the metal shavings (swarf) that come off. They rust very quickly and could damage your van.
Make sure you use a drill bit that will cut through metal; one typically uses cobalt drill bits for this purpose. They are resistant to abrasion and drill efficiently, they also dissipate heat quickly.
Step 3: Cut a hole in the side of your van
The best tool to use for this job is a jigsaw. Indeed, it is the single most important tool in your entire van conversion. Jigsaws cut corners very nicely and are easy to use.
Ensure you are using a jigsaw blade that can cut through metal. To make a clean cut, hold the jigsaw very firmly (it tends to wander, which can cause damage not only to your van, but to the jigsaw itself!). Cut your way around the pilot holes until you cut out the complete shape of the campervan window.
Note: To prevent the jigsaw from scraping the painted metal as you cut, you can/should place strips of masking tape down first.
Tip: When cutting, take intervals to add a few drops of tapping and cutting fluid to the cut. This reduces the heat of the blade and allows a straighter cut.
After removing the cut-out, file down the edges with a metal file to reduce the burs and remove the loose metal shavings.
Apply metal paint to the exposed edges to prevent rust and leave it to dry.
Step 4: Prep the van for bonding the window
You will prep the van for bonding in 4 steps, using your window bonding kit.
4.1. Rubbing alcohol: First use rubbing alcohol to clean and prep the area on the van where you will stick the window. Spray/rub it directly on the metal surface where you will fix the window and on the window. Leave it for a few minutes to dry off naturally.
4.2. Glass activator: Then apply the glass activator with a microfiber cloth (comes with the window bonding kit). The glass activator enhances the bonding surfaces of the glass (glass and metal), activating the adhesive on contact. Apply the activator to both the van and the window.
4.3. Primer: Next, apply the primer to the van where the window will be placed (to the edge of the metal). The glass primer chemically alters the glass surface, increasing its surface energy and making it more receptive to adhesive bonding.
Ensure you use masking tape around the edges as the black primer is just like paint. Allow about 15 minutes for the primer to dry.
4.4. Glue: Finally, apply glue on the van. Lather it on generously! Apply it continuously around the metal edges without leaving any gaps. Start from the bottom and work your way up - ensure you join the two ends of the bead of adhesive to form a watertight seal.
Glue can be quite thick and hard to apply. To make application easier, warm it up in warm water first.
Step 5: Install the campervan window!
Place the window right over the big hole! It is a lot easier if there are two of you to handle both ends of the window when placing it on the glue.
When the window is in place, push it firmly on the glue to seal it. Tape it to the van so it doesn’t slide and leave it to stick for several hours.
Note: Some people choose to use glass suction cups to stick the window to the van (a more accurate placement + easier to lift). This is the tool the professionals use. I personally found no need for this given the second pair of hands I had.
Step 6: Apply sealant
Most window installation instruction manuals don't mention using sealant because silicone can corrode the window adhesive glue if they touch. However in my opinion, sealant is really important to ensure a waterproof seal! The sealant will effectively seal up the gaps between the two surfaces.
Just make sure that you only use the sealant on the very outside of the window - make sure the sealant doesn't touch the glue on the interior!
To apply the sealant, first mask around the area, then apply a thin bead all the way round. Finally, wet your finger and trace over the bead to smooth it over.
For much more information on sealants and how to use them, check out our comprehensive guide on the subject.
Campervan Window Legal Requirements by Country
When converting a van into a campervan, it's important to comply with legal requirements regarding window installations, both in the UK and internationally. Windows are often subject to safety standards, light transmission regulations, and specific placement rules, depending on your region. Understanding these legal requirements is key to ensuring your conversion is both road-legal and meets campervan certification standards.
Region | Min. Number of Windows | Front Window Tint (Light Transmission) | Safety Glass Standard |
UK | 1 side window (for DVLA) | 75% windscreen, 70% front-side | ECE Regulation 43 |
European Union (EU) | 1-2 side windows | 70% (varies by country) | ECE Regulation 43 |
United States | Varies by state | 70% or higher (state-dependent) | FMVSS 205 |
Australia | 1-2 windows for RVs | 35% front-side | ADR 8 |
DIY vs. Professional Campervan Window Installation
When installing windows in a campervan, one of the first decisions you’ll need to make is whether to take the DIY route or opt for professional installation. Each approach has its own set of pros and cons, which depend on your level of skill, budget, and the specific type of window you plan to install.
DIY Window Installation
For those with some experience in van conversions or basic carpentry and metalwork, a DIY window installation can be a rewarding and cost-effective choice. It allows for full control over the project and can save you hundreds in labor costs.
However, there are key considerations to keep in mind;
Advantages:
Cost Savings: DIY installation can save you between £200-£500 in labor costs, depending on the complexity of the job.
Flexible Timing: You can install the window at your own pace, rather than scheduling around a professional.
Satisfaction: Completing a project yourself can provide a sense of accomplishment and pride in your build.
Challenges:
Precision Required: Cutting into your van requires extreme precision. A mistake can lead to leaks, structural damage, or rattling windows.
Tool Investment: You’ll need tools such as a jigsaw, drill, clamps, and metal files. These may be additional costs if you don’t already own them.
Risk of Leaks: Incorrect sealing or bonding can lead to water leaks, which can cause rust and interior damage. Proper use of butyl tape and Sikaflex sealant is critical.
Professional Installation
If you’re unsure about cutting into the van or prefer peace of mind, hiring a professional can be a wise decision. Professional installation is particularly advantageous for more complex or custom windows, such as curved or larger panoramic windows.
Advantages:
Expertise: Professionals have the experience and precision to ensure the job is done correctly, minimizing the risk of mistakes.
Warranty: Many installers offer warranties, so if any issues arise, they’ll handle repairs at no extra cost.
Time Efficiency: A professional can often complete the job faster than a DIYer, reducing downtime on your build.
Challenges:
Cost: Professional installation costs typically range from £400-£1,000 per window, depending on the type and location of the window.
Less Flexibility: You’ll need to work around the installer’s schedule, which could delay your project.
Factor | DIY Installation | Professional Installation |
Cost | £50-£200 (tools & supplies) | £400-£1,000 (per window) |
Time | Flexible, but longer | Quick, often within a few hours |
Skill Level | High for precision cutting and sealing | Low, handled by experts |
Risk of Leaks | Moderate to high, if not sealed properly | Low, professionals ensure water-tightness |
Warranty | None | Usually includes a warranty |
Conclusion
I hope you found this guide to Camper van window fitting useful! You are well on your way to a beautiful self-build campervan!
Don't forget to subscribe to The Van Conversion Newsletter for everything you need to get started with your own van conversion (I'll send you a free wiring diagram when you join).
If you're looking for some guidance with your van conversion, you might be interested in our book Roaming Home, or in our online course The Van Conversion Mastery Course. You'll learn directly from me how to convert a van into your dream home - no prior experience needed!
Until next time,
Shane ✌️