Crochet Thermal Stitch aka Double Thick Crochet Stitch – Photo and Video Tutorial

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When it comes to crochet tutorials, the Thermal Stitch crochet pattern aka Double Thick Crochet Stitch sure needs to be high on everyone’s list. This tutorial comes with many photos and a detailed video tutorial.

The Thermal Stitch crochet pattern has several uses – pretty much any pattern that requires lots of thickness and sturdiness is ideal for this stitch. Most crocheters like using this stitch for potholders or washcloths. But I used it for a pattern that you would have never thought would be great for it.

Crochet Thick Crochet Stitch known as Thermal Stitch

Thermal Stitch Crochet Pattern Uses

The first pattern I published using the thermal stitch was a book cover. Seriously, it was the perfect choice as it gave the book inside lots of stability and protection. Not only did it provide privacy by concealing what you are reading, but it also looked so amazing it made the book cover look like a real book.

The second crochet pattern that I published using this stitch was the Purple Passion Project Purse. I created many different purses and bags before. But I never liked the bag bottom being saggy or having to make a second layer with plastic canvas to provide stability. So I used the thermal stitch which made the bottom double thick and allowed me to save time and resources.

  1. Book Cover
  2. Purple Passion Project Purse
  3. Crochet Thermal Stitch Potholder

Crochet Thermal Stitch – The Secret to the Thick Stitch Revealed

And of course, the stitch also looks great. Some crocheters who never have used this stitch before might want to be careful when it comes to counting the rows. As this stitch is made in a zigzag, all you need to do is count the visible rows on each side and add them up. That is all there is to it. Simple

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Now, let me show you how to crochet this amazing stitch. Be aware I am showing you how to crochet it in a row only, but you can also simply make it in a round, but that is a bit more tricky. I would recommend making a flat piece and then sewing it together to make it into a circle.

Different Thick Crochet Stitch Types

Many crocheters have heard of the Thermal Stitch. But the stitch they assume is the only thick crochet stitch is the single crochet version of this beautiful zig zag technique to create a thick texture. However, you can crochet different thermal stitches using the same technique by crocheting in a zig zag.

In fact, I have created a Half Double Crochet and Double Crochet Thermal Stitch Tutorial for you as well. Furthermore, I wrote an article that explains and shows off many tips to crochet the Thermal stitch.

In fact, I have even invited a linked double crochet thermal stitch while teaching the double crochet thermal stitch to the members of my membership. That invited and ingenious crochet stitch tutorial can currently only be found within my membership called The Crochet Club. It’s incredible.

  1. Half Double Crochet Thermal Stitch
  2. Double Crochet Thermal Stitch
  3. 5 Tips to Crochet Thermal Stitches for Patterns
crochet thermal stitch is thick

Thermal Stitch
aka Double Thick Crochet Stitch
Video Tutorial

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Written Instructions for the
Crochet Thermal Stitch

Let’s start with teaching how to crochet the thermal stitch. The video above is far more detailed and provides a very clear explanation if you don’t understand the written tutorial and pictures below.

Let’s get your hook and yarn and learn this stitch, shall we? I love using the WeCrochet Dishie yarn for this and my favorite 5.00 mm H Furls Crochet Hook. Have you tried them yet?

Start Foundation Single Crochet Row

1. Make a chain in the length needed and crochet 1 row of single crochet (in the back hum of the chains!), chain 1

single crochet row as foundation for thermal stitch

Start Thermal Stitch Crochet Technique

2. Tilt the piece to the side. Now insert the hook into the back loop and the parallel loop from the chain row. Now do a traditional single crochet; repeat this for every stitch, chain 1 turn

start thermal stitch as thick single crochet in second row

3. Again insert the hook thru the back loop and this time the leftover loop (it was the front loop we ignored in the previous row) which is parallel to the back loop, crochet a traditional single crochet, chain 1

first row of thermal stitch crochet tutorial

4. Repeat step 3 as long as needed

5. To finish the piece, so to crochet the very last row, insert the hook thru both loops and the parallel loop (from the previous row) so that you are going through 3 loops instead of 2 and crochet a traditional single crochet, sl st and fasten off and weave in the ends as needed

crochet thermal stitch second row

After finishing the last row, it should look like this:

Thermal stitch crochet finished

If you need more help, check out the video tutorial above. This unique crochet stitch is double thick and made in a zig zag. Since that is very three-dimensional it can be hard to visualize in pictures. Therefore, I recommend watching the video tutorial for clear visualization of the thermal stitch.

Crochet the Thickest Crochet Stitch known as the Crochet Thermal Stitch

I hope you love this tutorial on how to crochet this thick stitch as much as I do. If you love this tutorial and technique, please use the social media share buttons above or below and share this pattern link with the world and your friends.

I also have more stitches you might want to learn. Check out my Ultimate List of Advanced Crochet Stitches for more inspiration. In fact, if you like unique crochet stitches that are also thick, check out the Linked Crochet Stitches and be surprised how it has not gaps at all.

That way you will find it easily again when you need it and you also provide the world and your friends the ability to gain extra crochet knowledge as well. And to top it off, you help me as it allows me to create more content that you love already and want to see more of – free crochet patterns and tutorials. So, thank you for sharing.

If you love the way my crochet tutorials and patterns and the way I teach, I would suggest subscribing to my newsletter below as I share new patterns, tutorials, and special announcements often.

Crochet Thermal Stitch aka Double Thick Crochet Stitch
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  1. I love this stitch but what do you mean when you say the hum of the chain stitch? Is that the straight line of thread that goes up the middle of the back of the chain? I have crocheted for years but have never heard this term before. I can’t seem to get this started. HELP PLEASE.

    1. The hump is the back of a crochet chain. From the top, you see 2 lines like a V. If you turn it around you will see an additional line which is the hump.

  2. I’ve been asked to attempt a weighted blanket for a child. Would you recommend this stitch for something like that?

      1. Wow you replied two minutes later and I’m just seeing this seven days later lol! Thank you, I’m definitely going to try it out!

  3. Great instructions good and clear easy to follow thanks for your video and all the best for the future 😀

  4. I LOVE this stitch! I can’t wait to make a potholder with this stitch and see just how thick it really is. I’m tired of having to make two pieces and crochet them together in order to make a decently thick potholder. It looks so easy that Io almost felt like you repeated yourself too many times. But I realize true beginners may need that repetition. Thank you.

  5. I absolutely Love this stitch! I followed your instructions and it was so easy! Thank You so much Nicki. I’ll be using this one for quite a few new patterns.

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