Crochet Thermal Stitch (very detailed photo tutorial)

Last Updated on July 14, 2024

The Crochet Thermal Stitch creates a thick double-layered fabric which is great for potholders, hot pads, and coasters, but you can use it for any other project, such as hats, bags, mittens, etc. The double layer is made by working both into the stitch from the previous row, and the stitch one row below. 

I promise it is not as complicated as you’d think! I put together a super detailed photo tutorial to help you conquer the crochet Thermal stitch.

crochet thermal stitch made by gootie

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The Thermal crochet stitch is one of the thickest crochet stitches. If you need to create a thick crochet fabric for your project, this is a fabulous option.

I made a detailed photo tutorial for the Thermal stitch using the single stitch, but you can use both the half double crochet and double crochet stitches to make a crochet thermal stitch.

  • SC Thermal Stitch (full instructions and photo tutorial below) – insert your hook through back loop of the next stitch and through the back loop of the parallel stitch 1 row below, yarn over and pull the yarn through 2 loops, then yarn over again and pull the yarn through the 2 loops to complete a sc stitch.
  • Half Double Crochet Thermal Stitch Yarn over, insert your hook through back loop of the next stitch and through the back loop of the parallel stitch 1 row below, yarn over and pull the yarn through 2 loops, then yarn over again and pull the yarn through the 3 loops to complete a hdc stitch.
  • Double Crochet Thermal StitchYarn over, insert your hook through back loop of the next stitch and through the back loop of the parallel stitch 1 row below, yarn over and pull the yarn through 2 loops, then yarn over again and pull the yarn through 2 loops, yarn over again and pull the yarn through the 2 loops to complete a dc stitch.
half double crochet thermal stitch made by gootie


Pin this for later HERE.

Skill level – Easy (requires some experience)

Materials I Used in This Tutorial
– Crochet hook 3.0 mm / G (I love the Tulip Etimo crochet hooks).
–  Sport (#2) weight yarn – I used Knit Picks Shine Sport.

Abbreviations (US)
ch – chain
sc – single crochet


Notes

  • The thermal stitch is worked into both the back loop and the loop two roes below.
  • It’s easier to work the stitch when the work is held at 90 degrees (as shown in the photos).
  • The first 2 rows can be a bit tricky, but it gets much easier afterward.
  • The pattern is reversible.
  • This tutorial is made with sc stitches, you can replace them with hdc or dc and work them with the same method as shown below.


Crochet Thermal Stitch Photo Tutorial


Chain any number of chains.

Row 1: work a single crochet into the back loop of the second ch from the hook, and in each of the chains across, don’t turn. Rotate the work in 90 degrees, as shown below.

how to crochet single crochet stitch made by gootie


Row 2: Ch 1, insert your hook through back loop of the next stitch and through the back loop of the parallel stitch 1 row below, yarn over and pull the yarn through 2 loops, then yarn over again and pull the yarn through the 2 loops to complete a sc stitch.
Continue working across to the end of the row.

how to crochet the thermal stitch made by gootie 2


* When you finish this row, there’s no need to turn (the work will be rotated in 180 degrees while you work the stitch, there’s no need to flip it to the other side), just keep the work as it is and repeat working in each stitch in the next row.

** We don’t turn, we are working into the wrong side.

thermal single crochet stitch made by gootie


Continue working row 2, until you reach the desired length. Then continue to row 3 to finish the work.

pattern for crocheted potholders made by gootie


Row 3 (last row): Ch 1, insert your hook through both loops of the next stitch and through the back loop of the parallel stitch 1 row below, yarn over and pull the yarn through 3 loops, then yarn over again and pull the yarn through the 2 loops to complete a sc stitch.
Continue working across to the end of the row.

Fasten off, soak and block if needed.

thick crochet stitches made by gootie

type of crochet stitches made by gootie

Did you try this out? Share your project!
– Let me know how it went and leave a comment below.
– Tag me on Instagram @madebygootie
– Join and share in our FB Community


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2 Comments

  1. I purchased two ebooks and haven’t received notification of how to download them.
    PLEASE HELP

    1. Hi Brenda,
      I see that you purchased through Ravelry.
      Please log in to your Ravelry account, then click on “my notebook” at the right top side, then open the Library.
      You will find there the eBook download links.

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