I have a 1/2 to 3/4 of an inch gap between the fiberglass and the outside of the window frame at the top corner.
Maybe it's just me, but I'm not clear on the nature of this gap. Is it
- as if the window opening is too large, so the window doesn't fill the available space, or
- as if the wall is not flat, so the window covers the hole but the flange of the window doesn't touch the wall it's covering at that corner?
If it is the first problem... the hole didn't get any bigger, and the window didn't shrink, so I would assume it needs to be re-positioned. Some of the cutouts in trailer shells are quite approximate.
I'm guessing that it is more likely the second situation...
If it is the second problem... the trailer wall is probably not flat, due to distortion over time, and without the retaining ring on the window to pull the fiberglass to the window frame it doesn't fit. It should fit again when the retaining ring is tightened.
If I sight along the surface of my B1700RGH (same model as Jim), I can see that the shape has changed and there is a "bulge" at one corner of the kitchen window... I assume that this window frame (one I have not removed for re-sealing) is holding the fiberglass in its current shape, fighting the tendency for the "wall" to bulge out in the middle.