Betsy trims the foundation backing 2" away from the last row of hooking and does a running stitch all the way around securing it to the bottom of the rug.
In the photo above Betsy is showing how the gold wool binding hides the join seam and protects the foundation from unraveling (the other rug).
For the wool braid Betsy uses 2" ripped straight of grain strips. It can be three of the same color or a mixture of the wool used in the piece to be braided.
Again, they are straight of grain and NOT bias. You would need 2 1/2 times the length of the perimeter of the rug to cover with a braided edge. To lengthen strips the two pieces of 2" strips are placed at an angle to form an F and stitched cross-ways to get the look below. Sorry, thought I'd captured a picture of the before but if you are a sewer you already know. If not, then google 'joining strips of fabric diagonally'.
Here is what it looks like when the strips are stitched together. One continuous strip of wool to use for binding. As the sewing is at an angle it doesn't make a thick bulk at one spot and makes the transition of thickness ever so slight.
Below is how Betsy starts the braid... she pins the 3 strips of colors chosen and pins them together.
Then using a braiding attachment at the edge of the table starts the braid with a taught edge. As the braid forms in length will move the braid thru the metal clamp and continues. When I braid mine will probably go the cheap route and use an industrial clamp since I won't do a lot of braiding. Who knows, maybe after I start will choose to buy a clamp so it works right.
Below notice how she pinches the butted edge together, using the same threat will stitch closed going back and forth until it is secure. Slowly and strategically she snips away at the edges of the join to be sure only the top parts lay over the raw edge of the wool.
Then she stitches the protective flap which hides those trimmed parts of the braid. The next step would be to stitch on the wool binding to hide the foundation which is still showing underneath the rug.
Below is a butted edge of a rug, can you see where the join is? Me either and I was there.
Betsy, Loved your class and hope to see you again soon.