Thor Travel Trailer Floor/Leaks
Welcom to the forum parOhd. Sad to say this is a fairly common problem with rvs
. More than likely you will find a bad water leak in the top somewhere or a window. Does it have the rubber roof? Really should inspect the tops every couple months and reseal every joint or seam often. Maybe some Thor owners will give you better insight as to where and if they have had problems with this.