Originally Posted by Rx2fish
The fabric liner I was referring to is the frame above the door on the camper interior. Photo is upside down.
Oh, that's why I was confused. My '89 DLX 17 doesn't have any fabric liner in that area. All seems well further up on the door and wall area.
What I saw today though, was tiny water streams from past rain on the roof (getting through my tarp also) hitting the side window (newly partially sealed along the top) and then dripping on the belly band. It follows the band 'downslope' to my door, both from the outside AND the inside of the belly band. This is not surprising, given how hardened the vinyl now is and likely not a good seal in several places. Once moisture is IN the track behind the vinyl it'll go undetected wherever gravity takes it.
As I've ripped off the last few inches of belly band vinyl insert adjoining the door, I can see water making its way right to the side of the door frame. It also looks like there might be multiple gaps along the vertical door frame seam and fibreglass, from the band location and down to the sill, which I've never caulked. This explains at least some of the collections of water I commonly see on the sill. The vinyl band insert is even pinched by the door frame, and its possible that water could get directly inside that area without any way of seeing it externally, because its underneath the vinyl insert.
I haven't determined yet whether water is getting through to the floor from the belly band source, or from the side window frame leakage. Will pop that window this coming week.