Installing a "Turbo 3 Low Profile" Roof Vent: Peugeot Expert Campervan Conversion
- slaters089
- May 28
- 2 min read
Updated: Jun 25
Welcome to the fourth instalment of our camper conversion series! In this post, we'll be installing a roof vent on to our 2020 Peugeot Expert. You'll find a step-by-step guide along with helpful tips and tricks for your own conversion project.
We used a "Turbo 3 Low Profile" roof vent, as it only requires one 80mm hole and uses a single screw to secure it for an easy installation.
A full walkthrough video is included at the bottom of the page.
Tools Used:
Step One: Cutting the Hole
I began by measuring 150mm from the raised groove. Then, measuring across the raised section, which was 250mm wide, I marked a line at the midpoint of 125mm.
Once I was happy with the measurements, I drilled a pilot hole to make sure I was as accurate as possible. After that, I switched to the 80mm hole saw.
I started drilling from inside the van upward until the shape of the hole was visible from the top. Then, I climbed onto the roof and drilled downward—this was much easier.
Tip: If you plan to stand on the roof, only put your weight on the structural points to avoid dents or damage.
Step Two: Preparing The Surface
After cutting the hole, I made the mistake of painting the exposed metal before checking if the fan fit correctly—which it didn't, as the hole was slightly too small.
I used the file to make the hole slightly larger and reapplied the paint after I had checked that the vent was fitting correctly.
Step Three: Installing The Vent
The vent came with three different sized screws to account for different roof thicknesses. After selecting the appropriate screw and adding the included rubber washer, the vent was ready to install.
The instructions didn't say Sikaflex was required, but I used some to be on the safe side and avoid leaks later on down the line. I spread Sikaflex around the rubber contact point that would meet the roof.
After removing a piece of misshaped plastic from the screw socket with a Stanley knife, I was ready to secure the vent.
I started by carefully hand-screwing the vent to avoid disturbing the Sikaflex. Once loosely attached, I tightened it further with a screwdriver. Once secured, I clipped on the bracket which opens and closes the vent.
The final step was to use a wet paintbrush to spread the Sikaflex evenly. It was a bit messy, but luckily, it’s out of sight.
What's Next?
In the next instalment of our campervan conversion series, we’ll be adding insulation and prepping the wiring for our leisure battery setup before reinstalling the ply lining walls.
For more van content, visit my YouTube channel here.
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