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The Single Crochet Thermal Stitch creates a fabric that is double thick! It is a stitch that lends itself well to a variety of items!

Although the stitch is double thick and quite dense, it has quite a bit of stretch to it. So along with projects such as pot holders and blankets, I have also seen this stitch used in hats and headbands.

Single Crochet Thermal Stitch
Single Crochet Thermal Stitch

There is a trick to this stitch! It is a simple single crochet stitch however the stitches are worked through the back loops of both row worked one and two rows below. If this sounds confusing, don’t worry, there is a video tutorial below that will help you on your way!

Single Crochet Thermal Stitch close up
A Close up of the thickness of the final fabric.

If you enjoy this stitch tutorial, you may want to check out some of the other tutorials on my blog such as Crossed Double Crochet | How to Crochet. You can find many others under the “crochet stitches” tab on the menu and a new one is added every Sunday!


For this tutorial I will be using the Caron x Pantone yarn by Yarnspirations along with a 6 mm crochet hook.  The hook shown here and in the video below is a wooden streamline hook by Furls Crochet. However you may use any hook and yarn combination you choose.

Single Crochet Thermal Stitch

This stitch is worked in rows in this tutorial.  At the end of each row you will need to chain 1 and turn your work.

Don’t forget to check out the free video tutorial linked below!

To begin, make a slip knot and then chain your desired number of chains.  For this stitch pattern you can use any number of stitches plus one for your foundation chain.

For my swatch I will be making a foundation chain of 21 chain stitches.

Row One:

When you look down at the top of your foundation chain, you will see a chain of V’s. For the beginning of this stitch, you are going to work in the back loops only of your foundation chain. The back loops are the horizontal bars of the V farthest away from you.

crochet foundation chain
Looking down at the top of your foundation chain.

So, working in the back loops only, work a single crochet in the second chain from your hook and in each chain across.

At the end, ch 1 and turn your work.

Row Two:

Now you will work into the back loops of both the row just worked and into the foundation chain below. Insert your hook in the back loop only of the single crochet and of the chain stitch of your foundation chain below. Complete your single crochet stitch. Repeat this all the way across.

Chain 1 and turn your work.

Row Three:

Row three is worked the same as row two however this time you will be working into the back loop only of the row below and the row two rows below.

And that’s it!

Repeat this third row for the desired length of your project.

To Finish your square:

To finish your square you are going to work one final row of single crochet stitches. This time when you work across, insert your hook under both loops of the top row AND the back loop of the row two rows below. This means that you will be inserting your hook under three loops.

Single Crochet Thermal Stitch
Insert your hook under both loops at the top row and the back loop only of the one two rows below.

At the end, fasten off and weave in your ends.

Video Tutorial:

Thank you so much for stopping by and I look forward to seeing you again next week!


The photographs and pattern contained in this document are the property of Rich Textures Crochet.  
This pattern is for personal use only.  
No unauthorized reproduction, in whole or in part, or distribution of this pattern or content is permitted.  ALL FINISHED PRODUCTS from this pattern can be used for local sales and sold online.
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  1. Stella Watters says:

    Hi Sarah, thank you so much for sharing this single crochet thermal stitch technique. I’ve got an idea to try using this stitch for the cuffs as mittens.
    I was wondering about the single crochet border of the thermal stitch square. Is it self explanatory once the square is completed? Where can I find the video for this that is mentioned?
    Thank you, again, for your shared crochet talents. 🙂

    1. RichTexturesCrochet says:

      Hello Stella, the video for the border should be at the bottom of this post 🙂

  2. Hi Sarah,

    Very nice pattern! Thanks for sharing. I was wondering, if I want to make a scarf with this pattern of 30 cm x 170 cm, how many meters of yarn would I need (with a 6 mm crochet hook)?
    Thanks in advance for your help!


  3. Kathryn Schnarr says:

    Hi Stella, thanks so much for sharing!! I was wondering if you’ve ever used this for round trivets (worked in a round) or if you have another stitch you would recommend. Thanks!

  4. Mary Perkins says:

    I have been using this stitch for sometime but never knew the name of it. I love it for pot holders. the double thickness is so nice. Someone asked me what the stitch was called and I didn’t know. When I tried to look it up, I couldn’t find it. Finally I called it a double think single crochet stitch and came across your video. Thank you. Now I can call it a thermal stitch. Ya-Hoo! It is nice to know what I have been making.