New Vertical Seam - Shasta Deluxe 1960 19'

I’ve never done it myself and hope someone will chime in with experience. The actual placement obviously has to do with the framing behind it. I’ve seen it done by the door which is easy because the span is minimal and the framing is heavy in those areas. I’m not sure about the Driver side framing. The only time I’ve taken apart a camper with two pieces on each side I found putty tape between the pieces which were overlapped with the front piece over the rear piece and screwed every 6” or so apart.

I spoke with Steve at Hemet Valley this afternoon. He said they stopped using the h-seam because it leaked so often.
He said to overlap the front over the back by 1 inch. Run a bead of silicone between the pieces and put a line of screws about 10-12 inches apart.

If the s-fold is being overlapped, then remove the nailing tab (and the underside of the fold) on the top layer (forward) for that inch overlap. This will allow the top s-fold to lay flat against the bottom layer(rear). Be sure to put a screw into the s-fold. If any silicone pushes out of the seam, let it dry and then rub it off. 

Since my curb-side seam is at the back of the door frame, and the s-fold won't be overlapped, I can skip that last part. I think I will be alright on the street-side also, because the seam/s-fold will be at the backside of the kitchen window frame.

I'll let you know how it turns out.

Yes about the breaks, ours is 4 inch break, so every 8 inches for us.