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Stitch Library

Thermal Stitch

Updated April 1, 2026

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Are you ready to learn one of the warmest crochet stitches around? Seriously, this stitch makes a wonderfully thick, sturdy fabric that’s perfect for projects that need a bit of extra OOMPH. If you’re looking for a way to add weight and warmth to a crochet project, you’ll love this Winter warmer. Perfect for making thick projects like potholders or sturdy bags and basket, it’s the coolest cold weather stitch you can learn. Ready to learn how to crochet the Thermal Stitch?

Pattern Use Ideas

Potholders

Baskets

Bags

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Materials and Tools

Yarn: I used MillaMia Naturally Soft Aran.

Hook: Hook to match yarn and your desired gauge. I used a 5mm.

Scissors

Darning Needle

Pattern Notes

Written in UK terms but switchable to US terms below.

Skill Level: Intermediate

Stitch Multiple: 1 + 2

This pattern gives you the basic principles for the Thermal Stitch, designed to help you create your own projects.

The video tutorial can be found at the base of the post.

Convert Pattern Terms

Here you can quickly switch between UK and US crochet terms. This will make following the pattern easier as all terms will be converted to your preferred version.

Terms & Abbreviations

Chain(s): ch(s): Yarn over, pull through loop on the hook.

Slip Stitch(s): ss(s): Insert hook, yarn over, pull through stitch and loop on hook.

Double Crochet(s): dc(s): Insert hook into stitch, yarn over, pull up a loop, you will have two loops on the hook. Yarn over, pull through remaining two loops.

Back Loop Only: BLO: Working into the back loop only of the stitch.

Special Stitches

Starting Thermal Stitch (SThs): Insert hook into BLO of next st PLUS the unworked ch on foundation ch, yo and pull up a loop, yo and pull through rem loops.

Thermal Stitch (Ths): Insert hook into BLO of next st PLUS the unworked loop on the row below, yo and pull up a loop, yo and pull through rem loops.

Closing Thermal Stitch (CThs): Insert hook into both loops of next st PLUS the unworked loop on the row below, yo and pull up a loop, yo and pull through remaining loops.

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A grey swatch of crocheted thermal stitch sits on a white background.

Thermal Stitch Pattern

You are viewing this pattern in UK terms.

Chain in multiples of 1 + 2

Row 1: dc in BLO of second ch from hook (skipped ch does not count as st), dc in BLO of each ch across. Turn.

Row 2: 1 ch (does not count as st), SThs in each st across. Turn.

Row 3: 1 ch, Ths in each st across. Turn.

Rep Row 3 until desired height.

Final Row: 1 ch, CThs in each st across. Fasten off and sew in ends.

Video Tutorial

Right-handed

Or you can watch on YouTube

Left-handed

Or you can watch on YouTube

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8 Comments

  • Miranda
    November 21, 2020 at 6:08 am

    Can this stitch be worked into an infinity scarf?

    Reply
  • Anita
    February 22, 2021 at 4:13 pm

    What about the hdc with the Thermal stitch?

    Reply
  • Isabelle
    March 24, 2021 at 5:28 pm

    Could this stitch be used for a temperature blanket?

    Reply
    • Kari
      December 28, 2021 at 11:57 pm

      Can thus stitch be done into a hat?

      Reply
  • Jessica
    November 16, 2021 at 11:18 pm

    Love this stitch! How do you get such neat edges? I’m not sure which stitches to go in at the end of each row.

    Reply
  • Christina
    January 20, 2022 at 4:42 pm

    What are recommended applications for this stitch?

    Reply
  • Marilyn
    February 11, 2022 at 2:09 am

    I have been using this stitch with strips of nylon netting to make square scrubbies. I love them, they hold up so much better than the circular scrubbies you usually see. I also make the cotton pots holders.

    Reply
  • Diane
    April 11, 2023 at 5:48 pm

    Is it possible to increase and decrease in the thermal stitch? If so, how?? thank you so much

    Reply

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