Prepare for overcasting stitch by following one of the drawn thread removal techniques - see stitch entries ‘Drawn thread preparation’ or ‘Drawn thread preparation with buttonhole edges’ for further information and methods.
Cast on in the woven patch and come up in the first gap.
Take the needle down two threads along and two up into the linen.
Come up in the gap directly above.
Continue the pattern to the end of the row of drawn threads.
A finished sample of overcast hem stitch. You need to pull fairly tightly to achieve the ladder effect.