after my experiances of the habitation check on my motorhome i decided to buy a dampmeter from aldi (9.99) went all over the van in the places where the habitation check showed damp. and couldn't get any readings. only one place where the check said 40% damp did i get a reading of 20%. when i spoke to the supplying dealer he said all motorhomes are inherently damp and this time of year more so. on the habitation checklist it says that anything up to 20% damp is ok. sounds fishy to me. but seriously what is and isn't acceptable.