Sewing Y-Seams

QuiltNotes Learning Center

Last Updated January 01, 2018

mark y seamsIf you say the words “Y-Seams” to many quilters you will see them cringe and make funny faces.

A Y-Seam occurs when three seams intersect. To sew them together you stitch three seams. The good thing is these seams are almost always straight so you are stitching three straight seams.

For each of the three fabrics at the intersection you start by marking the intersections of seam allowances as shown. When you sew each seam you will start stitching at the marked point and stitch to the end. I like to backstitch a few stitches so the stitching stays put while I stitch the other two seams.

Mark your intersections as shown then view the video to see how to piece the three seams.

Steps For Sewing Y-Seams

  1. Using a fabric marking pen or pencil, mark the intersections of each of the three fabrics to sew together.
  2. Start with two adjacent pieces. Begin stitching at the marked point and take a few back stitches.
  3. Continue stitching to the end of the seam line.
  4. Repeat steps 2 and 3 for each of the two remaining seams.

Another Y-Seam Demo

For another video on sewing y-seams by hand or machine, check out this one by Jinny Beyer.

Recommended Products


jinny beyer perfect piecer  Perfect Piecer by Jinny Beyer

Use this handy little tool for marking many different angles. This tool is great for hand piecing and for marking Y-seams.

 sewline pencils  Sew Line Marking Pencils

These mechanical pencils are available in various colors of “lead” for marking light, medium and dark fabrics. I use the white for dark fabrics and the black for light and medium fabrics.

Subscribe for updates