This is not exactly a hypothetical question but at this stage I don't want to give too much detail online. I've seen this quoted: I've quoted that figure as it is relevant and the motorhome would need to be returned to the converter. I'm not too sure what a "full stripdown entails". Is it simply a question of undoing some bolts and removing a panel or two or is such a roof repair more involved? The damp is now visually evident in the form of a small patch of light blue staining and the start of rippling in the ceiling. I don't know why the staining should be blue, I assume it's something they use in the manufacture. The point of water ingress is through a joint in the roof and the staining is immediately underneath this area.