I have a Hymer 562 Silverline on a Ford i went to Donaghey Motorhomes yesterday and paid 122 EURO . I had a look at the report they gave me and having a damp test done on this motorhome is a waist of money. Because there is so much they cannot check ( 1) the bathroom is all paneled in so that cant be tested ( 2) all the back wall is paneled in now what i mean is you have the outside walls and then there is a space between that and all the paneling so you cant damp test the outside walls . The only thing you can test for damp is 5 windows 2 overhead lockers and 4 roof lights the outside walls around the floor cant be tested as there sealed in as well so overall a waist of money. So mext time i will keep my money in my pocket and buy a damp test metter and do it myself.