That looks like a 24/24 vent/escape hatch... BF did not put them on. A 12/12 is what normally is there.
I put a 24/24 vent/escape hatch in my 2000 years ago.
The curvature of the roof required a build up of the surface of the camper due to its arch. The vent frame is metal, not plastic and will not conform to the arc of the roof.
I used extra layers of Butyl tape to compensate but as I pulled the vent frame down It did create a bit of a dip in the front of the frame of the vent. I just let it be, That was 15 years ago. The fiberglas is pliable and the gelcoat has never cracked.
In my opinion, if there is no indication of water intrusion it would be a great deal.
BTW... Look in the cabinets on each side of the head of the bed and into the clothes storage on each side of the bed... Check for water damage there. That is where the water will go!
Even a leaking running light on the front of the camper will leak and run across the front head of the bed and then into the side cabinets! I learned that pretty easy years ago.
Jim
