Gap between roof and front cap
When I first bought my motorhome (12 years ago) I noticed a lot of caulking on the left side of the seal between the one piece fiberglass roof and the front cap. It was obviously that there was a gap...
Forum Discussion
As mentioned self-tapping screws work very well in light gauge steel framing of about 1/8" or less wall thickness. Any thicker than that and you may have to drill a pilot hole. I would use a hex washer head stainless screw since it will allow you to have more driving force and more area to compress the fiberglass than a Phillips head screw.
