4 Steps to Make Insulated Window Treatments

A man opens a window.
  • 2 hours
  • Intermediate
  • 50-100
What You'll Need
Sewing machine
Tape measure
Straight pins
Insulated lining fabric

If you are looking for an easy and attractive way to cut your heating and cooling costs, look no further than insulated window treatments. As long as you are able to work a sewing machine, you’ll have no problem tackling this task yourself.

Step 1 - Measure

Before you can even purchase the fabric that you are going to need, you will need to measure the window to know how much to buy. Measure the width of the window and multiply this number by two. This will give you one dimension. Measure your other dimension from the top of the curtain rod to the length of your desire (most window treatments either fall to the floor or lay two inches under the sill). Add 12 inches to this measurement and this will give you your second dimension. This is the amount of fabric you will need to purchase.

You will need the same width of insulated lining fabric and flannel. However, subtract three inches from the length of the curtain fabric to give you the height that you will need for these other two.

When purchasing the material for the curtain itself, lean toward a material with more substance such as cotton or crushed velvet. The heavier the material, the better it will work for keeping the cold out and locking the heat in.

Step 2 - Create the Hems

Fold the curtain fabric up four inches and press. Fold the fabric over once more, press, pin, and sew. You have just created a four-inch hem on the curtain.

Fold the edge of the flannel up three inches and press. Fold the fabric over once more, press, pin, and sew. Repeat this for the insulated lining fabric as well. The flannel and lining fabric now have three-inch hems.

Step 3 - Sew Them Altogether

Lay the curtain fabric with the pattern side up. Lay the lining fabric over the top of this ensuring the tops are lined up evenly. Lay the flannel face down on top of the lining fabric again ensuring the tops are lined up evenly. Pin the edges and sew. Do not sew the top or the hem, only the sides.

Keeping the flannel and the lining fabric together, turn your three-layered curtain inside out to expose the pattern side of the curtain fabric. This will place the curtain fabric on one side and the fabric lining on the other, pinning the flannel in the middle as the center layer. The point of this was to get the seam on the inside of the curtain where it won’t be exposed.

Step 4 - Create the Rod Feed

Turn the top edges down ½ inch and press. Turn down an additional three inches, press, pin, and sew. Sew through all layers across this edge leaving the ends open for a point of entry to slide the curtain rod through.

Now that you have successfully made your window treatment, all that is left is to slide the rod through and hang it.