thermal stitch crochet tutorial

Thermal Stitch Crochet Tutorial

The thermal stitch crochet tutorial is an easy stitch with a unique crochet technique that creates a dense, thick fabric perfect for items requiring extra thickness and insulation. This stitch is an excellent choice for pot holders, hot pads, and crochet bags.

Thermal stitch is one of the thickest stitches made using basic crochet stitches. It is slightly different from the conventional crochet method and easy to master!

The double-thick crochet hot pad was made using the thermal single crochet stitch. Get the instructions here.

Easy and quick hot pad free pattern

Common thermal crochet stitches include:

  1. Thermal Single Crochet (TSC): This is the foundation of thermal stitches, involving single crochet stitches worked uniquely. You crochet through the back loop of the current row and the unworked loop of the previous row, effectively doubling the fabric’s thickness. The simple single crochet stitch is excellent for items needing a lot of heat resistance.
  2. Thermal Double Crochet (TDC)
  3. Thermal Half Double Crochet (THDC)
  4. Thermal Slip Stitch (TSS)
  5. Waffle Stitch
  6. Basketweave Stitch

Materials Used for the Thermal Stitch Tutorial

  • Yarn: 24/7 Cotton – Worsted weight, #4 lightweight (100% Cotton, 186 yd/170 m per 3.5 oz/100g skein)
  • Hook: 5 mm Crochet Hook
  • Estimated Yardage: 120 yards

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  • This pattern is in US Terminology.
  • You can use any chain number to achieve the desired number of stitches. Continue to repeat row 3 until you reach the desired length. 
  • Use the back loop of the row below throughout the pattern or when instructed to do otherwise.  
  • The chains at the beginning of rounds or rows do not count as stitches.
  • You can substitute any #4 weight of yarns.
  • Reading through the pattern before starting is advised.

How to crochet the Thermal Single Crochet Stitch

Foundation Row:

Chain any number of chains, with no specific multiple required for this stitch.

Row 1:

Using the back loop only blo of the chain, insert the hook into the second chain. Single crochet (sc) in the second chain from the hook and in each chain across until the end of the row, turning your work at the end.

Row 2:

Working into the BLO of the current row and the leftover loop from the foundation chain, sc in each stitch across until the end of the row, turning your work at the end.

Row 3 and Beyond:

Continue using only the BLO of the current row and the unworked loop from the row directly below, sc across, and turn.

Repeat the very last row until your project reaches the desired length.

Finishing: Final row

Chain 1, turn, and single crochet across, going through both loops of the current row AND the open loop from the previous row, capturing three loops total on your hook for each stitch.

Example Projects Using Thermal Stitch:

The thermal stitch is perfect for projects intended to be used near heat. 

  • Pot Holders: The thick texture of the thermal stitch provides excellent insulation against heat.
  • Hot Pads: Like pot holders, the dense fabric protects surfaces from hot dishes.
  • Crochet Bags: The thermal stitch offers a compact fabric that holds its shape well for a sturdy and durable crochet bag.

How to count rows of your project

Thermal Crochet Stitch Rows

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About Thermal Stitch:

Is the thermal stitch hard to master?

The thermal stitch is considered easy once you get the hang of working through the loops of different rows. It’s a good choice even for beginners looking to try something new.

Can I use acrylic yarn instead of cotton for thermal stitch projects?

While acrylic yarn can be used, cotton is a better choice for pot holders and hot pads due to its heat resistance and durability. Acrylic might melt when exposed to high temperatures.

How much yarn will I need for a project?

Yardage can vary depending on the size and the yarn weight. A good estimate for a small project like a pot holder is around 120 yards of #4-weight cotton yarn.

Can I make a thermal stitch blanket?

Yes, the thermal stitch can be used for larger projects like blankets. However, it creates a very thick fabric, which might be pretty heavy and use a lot of yarn.

How do I ensure my thermal stitch project doesn’t curl?

Ensuring consistent tension throughout your project is key to preventing curling. A hook size matching the yarn weight can also help maintain an even fabric.

Do I always have to use the back loop only for thermal stitch?

Yes, working in the BLO and the unworked loop from the previous row is essential for creating the thermal stitch’s characteristic thick, double-layer fabric.

This thermal crochet stitch tutorial provides a comprehensive guide to creating durable, insulated crochet items perfect for everyday use or as thoughtful handmade gifts.

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