How to Make Thermal-Insulated Curtains for Your Home

Enhancing your home’s comfort and energy efficiency can be as simple as making your own thermal insulated curtains. These curtains do an excellent job of keeping your home warmer in the winter and cooler in the summer, all while helping to reduce your energy bills. 

This guide will walk you through the steps to create thermal insulated curtains that are both functional and stylish. Whether you’re looking to save money, reduce your carbon footprint, or add a cozy touch to your decor, these DIY curtains are a perfect solution.

Materials You’ll Need

Creating your own thermal insulated curtains requires a few essential materials. Here’s a list of everything you need to get started:

  • Fabric for the Front: Choose a decorative fabric that complements your home decor. The amount needed depends on the size of your window.
  • Thermal Lining Fabric: This special fabric, like silica cloth, adds insulation to your curtains, keeping the heat in during winter and out during summer.
  • Curtain Tape or Header Tape: This is sewn to the top of the curtains to create neat pleats or gathers.
  • Curtain Hooks or Rings: Used to hang the curtains on a rod.
  • Sewing Machine and Thread: Essential for sewing the fabric and lining together.
  • Measuring Tape: For accurately measuring the fabric and window dimensions.
  • Scissors: To cut the fabric to the required size.
  • Pins: To hold the fabric pieces together while sewing.
  • Iron and Ironing Board: For pressing seams and ensuring a neat finish.
  • Optional: Decorative trim for an added touch of elegance and blackout lining for extra light control and insulation.

Step-by-Step Guide To Making Thermal-Insulated Curtains

Creating your own thermal insulated curtains is easier than you might think. Follow these simple steps to make beautiful, energy-efficient curtains for your home.

1. Measure and Cut Your Fabric

Measure your window dimensions to determine the size of your curtains. Add a few extra inches to the measurements to account for hems and seam allowances.

  • Measure Window Dimensions: Measure the width and height of your window. Double the width measurement to ensure the curtains can extend past the window frame for complete coverage.
  • Add Extra Inches: Add an extra 2-3 inches to each side for hems and seams.
  • Cut the Fabric: Cut the decorative front fabric and thermal lining fabric according to the specified dimensions.

2. Prepare the Thermal Lining

Lay the thermal lining flat on your working surface. If you choose to use blackout lining for extra insulation and light control, cut it to the same size as the thermal lining fabric and layer it on top.

3. Assemble the Curtain Layers

Place the front fabric and thermal lining together with the right sides facing each other. Pin the layers together around the edges to keep them aligned during sewing.

  • Pin the Layers: Secure the layers by pinning them around the edges.
  • Sew the Edges: Sew along the pinned edges, leaving a small opening to turn the curtain right side out.

4. Turn and Iron

Turn the curtain right side out through the opening. Use an iron to carefully press the seams and create a crisp edge.

  • Turn the Curtain: Pull the fabric through the opening to turn it right side out.
  • Iron the Seams: Iron the edges to create a clean, crisp finish.
  • Hand-Stitch the Opening: Use a needle and thread to hand-stitch the opening closed.

5. Attach the Curtain Tape

Iron the top edge of the curtain to remove any creases. Align the curtain tape or header tape with the top edge, pin it in place, and sew it to the curtain. This tape will create neat pleats or gathers.

  • Pin the Curtain Tape: Attach the curtain tape to the top edge of the curtain.
  • Sew the Tape: Sew along the guidelines on the tape to secure it in place.

6. Add Curtain Hooks or Rings

Insert curtain hooks or rings into the loops on the curtain tape. While doing this, ensure they are evenly spaced to create a balanced look.

7. Hang Your Curtains

Install a curtain rod above your window, ensuring it is level. Hang the curtains by hooking the rings or inserting the hooks onto the rod. Adjust the fabric to ensure it is evenly distributed and hangs at the correct length.

Additional Tips

Creating thermal insulated curtains is a rewarding project that can significantly enhance the comfort of your home. To make the most of your new curtains, consider these additional tips:

Decorator Touches

Add a personal and unique touch to your curtains by incorporating decorative trim or contrast piping. This can elevate the overall look and complement your home decor beautifully.

  • Trim and Piping: Sew decorative trims along the edges or use contrast piping for added elegance.
  • Coordinating Fabrics: Choose fabrics that coordinate with your room’s color scheme for a polished look.

Layering for Extra Insulation

For even better insulation and light control, consider adding a layer of blackout lining. This additional layer can help keep rooms darker for better sleep and further reduce energy loss.

  • Blackout Lining: Cut blackout fabric to the same size as your thermal lining and layer it in the assembly step.
  • Triple-Layered Protection: Combining decorative fabric, thermal lining, and blackout lining offers superior insulation.

Care Instructions

Proper maintenance will ensure your thermal insulated curtains last longer and continue to look great. Always check the fabric care labels before washing or ironing.

  • Washing: Follow the care instructions specific to your fabric type. Some materials may be machine washable, while others require dry cleaning.
  • Ironing: Use the appropriate heat setting on your iron for the fabric. Always iron on the reverse side or use a pressing cloth to protect the material.

Measuring for the Perfect Fit

Ensure that your curtains fit your windows perfectly by double-checking your measurements.

  • Width: For total coverage, your curtains should measure 1.5 to 2 times the width of the window.
  • Height: Make sure the curtain length accounts for the rod height and includes allowances for hems.

These additional tips can enhance the efficiency, appearance, and longevity of your DIY thermal insulated curtains.


Creating your own thermal insulated curtains is a straightforward and rewarding project. Aside from a cheaper aesthetic, you also improve energy efficiency in your home during winter and summer. 

Investing time in making these curtains can lead to significant long-term savings on your energy bills. They provide a cost-effective way to improve your home’s comfort and reduce your carbon footprint. Whether you choose to add extra layers for additional insulation or incorporate decorative touches to enhance your room’s decor, the effort you put into creating your curtains will be well worth it.

Follow this guide to create your own thermal insulated curtains and enjoy the benefits they bring to your home.


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