I have just done a complete front end rebuid on my six year old van and was disgusted to see how the leaks acured,and the same is in many new vans because like many caravanners we are attracted to look at other vans,so the next time you look at a new caravan,Open up the front windows as wide as you can and lift the window seals away from the body and look at the staples that go through the body and fixed into the window frame,Some of these staples go in so hard from the gun that they not only go through the bodywork as they intend,but they also split the body up to two inches or more,Damage done for water ingress witch takes years to come to light on the inside and by then its out of warrency,Last year i got told to leave a caravan i was looking at by a dealer as i had the windows wide open and found splits behind the seals of a two year old caravan,His response was i think you have seen enough of the van now,just close the door and leave,Hence my response was your reputation has changed any has it,Remember a damp tester doesnt always work,Godd luck,