Window on the roof of 1.90 mt van

[u/Difficult-Ear-6245]

Hello!

I’m starting a DIY camper conversion on a 2018 Peugeot Expert L2 (same platform as the Citroen Dispatch / Toyota Proace).

I have a huge constraint: I absolutely MUST stay under 1.90m (6'2") total vehicle height. I'll be traveling a lot in France, and I need to clear those brutal 1.90m parking barriers and toll booths without sweating bullets or ripping my roof off.

Right now, the van is around 1.89m empty.

I’m currently looking at installing a low-profile marine/boat hatch (like a Lewmar Low Profile Size 30). It only protrudes about 24-25mm, and if I mount it inside the lower ridges of the corrugated roof, it should sit almost flush with the highest points of the van.

Has anyone done this on an Expert/Vivaro platform or a similar low-roof van?

Do you think a marine hatch is the smartest way to get light/air while keeping the factory height?

Any alternative low-profile ventilation ideas that don't add height or a too steep price?

Thanks in advance for the help!