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Bias Bound Seam – Tutorial

June 26, 2013 by Abby 14 Comments

Bias Bound Seam

Bias Bound Seams give a quality finish to an un-lined garment and allow you to make a feature of your seams with contrasting or patterned bias tape, or to finish them neatly with a matching colour. If using a contrasting tape, make sure it wont show through to the right side.

Because bias tape is used, this finish works perfectly on straight and curved seams. See the pictures at the bottom of the tutorial to see how it can be applied to the inside seams of a coat. Whilst this kind of finish is usually applied to garment seams, it can also be used on home decor items and accessories.

A Bias Bound Seam uses double-folded bias tape to finish off a seam edge. The bias tape can be applied to both seam allowances separately (a pressed open seam) or to both seam allowances at once (a seam pressed to one side). This tutorial shows you how to apply the bias tape to both layers of the seam allowance at once. When doing this, keep in mind the weight of the fabric so that the seam doesn’t end up too thick!

How to sew a Bias Bound Seam – Tutorial

The width of bias tape you use is up to you. For my seam below, I have used a 6mm (1/4″) double fold tape. You can use pre-purchased tape or make your own. Either way, make sure you pre-shrink your bias tape. The last thing you want is for your tape to shrink AFTER you’ve put it on all your seams! If you are making your tape, then wash the fabric before you make the tape to sort out any shrinkage.

Bias Bound Seam - 1 Bias Bound Seam - 2

Sew your seam as you usually would, typically sewn right sides together. If following a pattern, use the seam allowance given in your instructions. You want the width of the bias tape to be less than your seam allowance. I have used a 1cm (3/8″) seam allowance.

Bias Bound Seam - 3

If finishing your seam allowances together, press the seam to one side. Otherwise, press the seam open.

Bias Bound Seam - 4

Take your bias tape and fold it around the seam allowance. Pin parallel to the seam. If one side of your bias tape is slightly wider than the other, put the wider side underneath.

Bias Bound Seam - 5

Sew the bias tape close to the edge, catching both halves of the tape at the same time. All done!

Bias Bound Seam - 6 Bias Bound Seam - 7

Here you can see the finished seam from either side…lovely!

Bias Bound Seams on Coat

Above and below are some pictures of a coat I have that has all the seams finished in this way. Note that some of the seam allowances are finished separately, and some are finished together. Also note, that this looks great on curved seams. This finish can even be applied around armholes.

Bias Bound Seams on Coat

Filed Under: Seam Finishes, Sewing Tagged With: Seam Finishes, Sewing, Sewing 101, Tutorials

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Reader Interactions

Comments

  1. Cassandra says

    June 26, 2013 at 2:14 pm

    Another great tutorial! I’d not come across this technique before, but will store it in the memory bank for future use now 😉

    Reply
  2. Mrs. Lucky says

    June 26, 2013 at 4:19 pm

    Even though I have seen some tutorials on this before, I must admit, yours is one of the clearest tutorials I have ever come across with. Definitely something to come back for later. Thank you!

    Reply
  3. Anne Weaver says

    June 27, 2013 at 12:30 am

    LOVE bias bound seams, especially in jackets! They always remind me of a skeleton of the garment. I’ve posted on Craft Gossip with a link to your tutorial:
    http://sewing.craftgossip.com/tutorial-bias-bound-seams/2013/06/26/
    –Anne

    Reply
    • thingsforboys says

      June 28, 2013 at 3:33 pm

      Thanks Anne!

      Reply
  4. Jaclyn O'Hara says

    June 27, 2013 at 2:32 am

    I found your blog and this post from Craft Gossip, and now I’m a new bloglovin’ follower! This is a great tutorial and a great reminder of how to give a nice finish to seams. Thank you!

    Reply
    • thingsforboys says

      June 28, 2013 at 3:34 pm

      Thanks for following Jaclyn! It’s such a lovely finish isn’t it?!

      Reply
  5. Nanny@nannynotes2u says

    June 27, 2013 at 7:51 pm

    A really interesting tutorial – I love the neat finish of the bound seams! Thanks! 🙂

    Reply
  6. Wendy says

    June 29, 2013 at 4:11 am

    great tutorial, the seam looks lovely. thank you!

    Reply
  7. Анна А says

    July 1, 2013 at 4:45 pm

    You have a wonderful blog! I am also a mother of two boys and I loved that about what you write! translated by Google

    Reply
  8. Andrea DeLesDernier says

    July 3, 2013 at 11:12 am

    thanks for this. Wonderful tutorial.

    Reply
  9. Andrea DeLesDernier says

    July 3, 2013 at 11:12 am

    thanks for this. Wonderful tutorial.

    Reply
  10. Anonymous says

    August 6, 2013 at 9:54 pm

    TROP BIEN TES EXPLICATIONS

    Reply
    • sondra Wassmann says

      September 27, 2013 at 11:54 pm

      Enjoyed seeing this very clear. Have sewn for years enjoy it. I have 4 grown sons & 7 grandsons. Did get 4 granddaughters so having to learn to sew for girls.

      Reply
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    March 19, 2016 at 12:32 pm

    May I simply say what a relief tto uncoveer someone that
    truly understands what they are talking about onn the net.
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