hi if the caravan is moving (ideal way to tell hitch up on car no legs down whatsoever and gently rock caravan by moving your weight )or bonce front on handles if the front is on the move then you have a few more problems than a floor rotten,really speaking it is a specialist repair as the entire front end is moving independently to the sides this is very bad news usually caused by rotten timber in side runners and behind aly moulding strip both sides
we see cases of this all the time some caravans its worth doing job others ie age of caravan its not
if you want any further details www.caravanbreakers.net
graham and shane
June 2010