Hi I’m looking for some advice and help. We have an old Abbey GTS caravan in need of some serious tlc. When we bought it a few years ago we updated the interior and made it all pretty inside (much to my husbands disgust!!) We have recently decided to remodel the inside as the layout no longer fits in with our family. After removing cupboards & wardrobe etc we have found some serious damp and rot right through to the polystyrene behind the walls. Everything seems to look whole and intact but obviously there’s water getting in. Any ideas as to what this could be or things to rule out? We really don’t want to give up on it as we love our little caravan but it looks far worse than we had thought!!