I usually use a French seam for shelters but am considering trying a felled seam. My though is when holding and sewing the two panels together for the first stitch line, you usually line the raw edges up then trim the one that’s inside the fold. However, I was thinking about holding the panel you would normally trim a half inch inward of the other edge. This would not only prevent the time and wasted material from trimming, but leads me to my next hunch. Wouldn’t this automatically center the seam for you? If you do a normal FF seam and don’t accommodate for the overlap when cutting (I.E. the two panels are of the exact same width) the center of the seam does not end up being exactly centered on between the two panels. The true center would normally be where your first joining stitch line was sewn then when you fold the seam over and sew again, you’re actually creating an offset seam.
Am I thinking through this correctly? If I cut both panels to the same width and pre-offset the edges when starting the seam, wouldn’t the seam end up being center? Anyone else do this?
