Mend a frayed trouser hem with this simple Letsfixit guide.
Open the seam and iron flat.
Cut out a piece of material to be used as backing for the repair. The color does not matter as it will not be seen.
The backing material is placed behind the frayed area. I used Stitch Witchery between patch and frayed area. A hot iron will bond the patch to frayed area.
Both sides of the opening are machine sewed with a zigzag stitch to stablize the fraying.
Before and after trimming the patch.
The hem is recreated just a bit higher than the repair. Be sure to pin.
This is how it looks after the repair.