You guys with your pictures are starting to scare me again.
I went out to take a look at the floor again today in the rain and I'm not seeing any water. The floor just looks a little lighter in the areas where the bleach/water cleaning has dried up.
My recollection from what the previous owner told me is that everything was sealed up on the outside when P&S put the new clearcoat on in 2001. I can't tell when (if?) the furnishings were last removed but I'm guessing from the clutter I found that it was before 2001, so maybe the moisture came into the trailer before the exterior was redone. The p.o. left me some vulkem and said she was careful about watching the seams and windows for possible leaks. The only leak she had experienced was during a severe, driving rain and she said water came in somehow around the antenna and leaked onto the stove. I haven't found any floor problems there (yet).
We are the 4th owners and the last owner full-timed in it until last fall. The trailer has traveled all around the country until it was parked last fall. From the records I have, it looks like it's home has always been the northeast. But you know what they say about our summers up here -- it's not the temperature, it's the humidity! We live in a forested wetland area so it's not going to get any better. My assumption was that once the mildew had gotten started and was not properly cleaned out, it was fed by humidity in the air and improper ventilation. My hope was that once I cleaned up the mildew and repaired the floor, I wouldn't have any more problems.
Okay, okay. I know I'm still in denial about any water getting in. I'll keep checking.