Hi @bobmatthyssens, thanks for the question, from the description, it sounds like this should not be a problem to do in Webflow, however, it would help if you could share the read-only link also, so that we can see how the site is setup in the design view: Share a read-only link | Webflow University
There is a page called Sticky Navigation, that shows how you can achieve a sticky navigation element effect using webflow. Probably would need to tinker with this a bit, but hopefully this helps.