A very common issue with caravans is the front panel cracking above the front window, this usually starts from one of the screw holes in the window mounting rail.
Repair cracked front panel on caravan
The windows are removed, the mounting rail is then carefully removed from its sealer bed, all old sealer is removed to expose the full extent of damage.
The cracks are then repaired using a hot stapler. Once the crack is repaired the area can then be refinished to create an invisible repair.
The window rail can then be refitted and resealed and finally the windows reattached.