Sometimes I do the straight stitch and zig zag stitch before hooking to make it easier to manipulate the rug without all the weight of the hooking. That is what I did with the Red Bird of Pennsylvania rug, and if you look closely can see the stitching in white thread.
So I drew a line 1 1/2" away from the last row of hooking and did two rows of straight stitching and then one row all the way around of the zig zag to connect the stitch lines together. Note that I shortened the corner to make the corner less bulky.
And then I cut away the excess foundation so it can be rolled forward.
After having read Cindi's tutorial and what others may have done, realized that I would never cut my backing away without the edges being secure first. And even tho the ends will be rolled forward and tucked inside do not want teasing to occur over the years. And I have purchased rug patterns from people who use the fray check on the ends (vs. serging) and that makes the ends stiff and non flexible so don't want a rigid chunk along the perimeter of my rug tucked in or not. I believe that would be more abrasive on the linen fibers than having sewn the edges.
The article mentions the needles penetrating the foundation and perhaps weakening the fibers. Frankly, before having read this article wondered just how secure my rugs were even with the precautions I was taking with the straight stitch and zig zag. I mean, how likely is it that a thin sewing machine needle would penetrate the middle of a thread of linen? My concern was that the stitches were going in the hole between the linen weave and how secure is that?
Additionally, the stitches and zig zag are 1 1/2" away from the main rug itself so just how is the penetration of a single linen thread (or rug warp, or monks cloth) going to jeopardize the strength of the hooked rug at that distance? Those fibers are flexible and not like a piece of glass that will shatter across the distance.
And I know first hand how not protecting edge of rugs are important. I was given a beautiful rug from a departed friend and hooker. On occasion I would lift the rug off the floor (from it's out of the way location) and air it out. Because she had not secured her edges of linen in any way noticed it starting to tease away.
So, take this as food for thought on whether you think you should or should not zig zag your rugs. But for certain you should do something to the ends to protect all the hard work that went into your heirloom piece.
Have a great evening everyone and enjoy this Holy holiday with family and friends.