Thermal drapes can help save you a lot of money on heating costs. Layered drapes help keep your house warm because the thin layers of air trapped between them act like thermal blankets for your windows.
To make your own thermal drapes, start by measuring your window, including at least half the width of the window frame on both sides. Add 1 to 1 ½ inches to allow for seams, as you need to capture the edges of all three layers.
Buy your fabric. The front can be anything that will match your homes décor. For the back of the fabric, choose a neutral color that will look good from the outside.
Buy your aluminized bubble wrap. To save money on this part, you can also use plain bubble wrap for this layer. The insulation value will still be good, but not as high as if you use the aluminum foil back type of bubble wrap.
Cut out your 3 layers. Pin or loosely tape the 3 layers together, inside out. Be sure all layers will be facing the correct way when you turn them right side out. Sew the layers together on all three sides. Turn the layers right side out, being careful to square the corners.
Slip stitch the remaining edge closed. Attach Velcro to the edges of the back of the fabric and the edges of the window frame.
Test your drapes to see if any cold air is coming through in cracks between the drapes and the window frame. If there is, add more Velcro fasteners.
Put up your thermal drapes on very cold days or at night. When you are not using your thermal drapes, they can easily be folded up and put away until the next time you need them.