This picture shows the 1" cut strip and the strip pressed in half lengthwise, wrong sides together. When I joined more than one strip together, I use a diagonal seam.
Here is the flange basted onto the edge of the quilt. I baste it using an 1/8" seam allowance. I like to baste the flange on so it stays put when I add the border.
At the corners, I just overlapped the flanges.
Here you can see the two lines of stitching--the basting stitches for the flange and the regular seam for the border. By using an 1/8" seam allowance for basting, it's covered by the border seam so I don't have rip anything out! I plan on putting a red flange on the quilt before I put a blue binding on it.
I hope you try a flange on your next quilt!