Mystery damp in dry van

rjr62
rjr62 Forum Participant Posts: 3
edited December 2014 in Caravans #1

Our van has a bizarre recurrance of damp on the hardboard cushion support nearest the window. It is the long piece which sits under the back rest below the window. Only the top surface gets damp, from a point about one third of the way from the point. The
side wall is not wet/damp, nor any areas above, nor curtains etc. In fact it seems like the damp is coming from the middle of the hardboard itself! We have this in only the one place and it occurs irrespective of rainy weather. What could it be and what can
I do about it? There are no cushions on this area and van seems pretty well ventilated.

Any ideas? Cheers.