I learned my first "hard way" lesson about our camper last night. (Yes, I was sleeping in it in the yard again. Don't judge me.) I had the small slider window at the head of our bed opened to get some air. (Why else would you have it opened, Wojo?) Some major storms rolled through, and before I could wake up and close the window I learned this...
The seal on the top of the roof that runs the width of the camper, and seals the camper up when closed, also does a superb job of redirecting the rain right down the sides of the camper. We had some serious, sideways rain last night so the stream of water was significant. That raging torrent of redirected roof water apparently runs across the window, and with it opened it went right into the track...which then filled up and ran right down the wall onto the pillows and mattress and onto the cabinet by the door. This happened quickly...like in seconds, not minutes.
Lesson Learned: If there is even a hint of precipitation in the forecast, and we're not going to be up or available to close that window, it won't be open.
After mopping up the water, which I did just after closing the window, the storms continued to rage on for another hour. In case y'all are wondering, the closed window did far better than the open window at keeping the rain out. I now can highly recommend utilizing the "closed" mode during moist weather.