How to flatlock seams with a serger

inside: Learn how to flatlock seams on a sweatshirt. A raglan style sweatshirt is a perfect project for flatlock seams. Use free sewing patterns and a flatlock seam with a serger to create easy seams.

Last week I shared a basic tutorial for flatlock seams, but I didn’t make a project with the technique. I promised that I would be making a project with flatlocking soon. Today is that day! I sewed a raglan sweatshirt last week on my live show and it has amazing flatlock shoulder seams. This post will give you all the details.

How to flatlock seams

Let’s get to the links first! Check out last weeks flatlocking with a serger tutorial. This post will give you all the machine settings and details to get you started with a flatlock stitch. The sweatshirt I’m wearing here is the womens raglan sweatshirt free pattern found here. Want to make this project for kids? Use the free kids raglan shirt here. Looking for other fun tutorials for raglan style shirts? Check out this raglan shoulder hack here.

Here are a few shots of my new sweatshirt, which I LOVE. You can find the video tutorial for adding the flatlocked shoulder seams below. But, let’s take a look at the final product and a few close up looks at the seams first.

For now I only flatlocked the four seams where the arms attach to the front and back. I’d love to play around with using this method for the neck and armbands as well, but I’m not quite sure with all those layers.

This sweatshirt is super cozy!! You can find all my favorite places to find cozy fall fabrics here. Here is what one shoulder looks like from the top… Both from and back of one arm can be seen. I like the pink thread stitches contrasting the green.

And here is what the inside of the sweatshirt looks like. The ladder stitch running along the seam.

How to sew a sweatshirt with flatlock shoulder seams

Here is the tutorial video. If you are having trouble getting it to play, make sure your adblocker is disabled or try a different browser. Enjoy!

here are a final could close ups of the final shirt and I love them! You can play around with thread colors for a variety of looks.