Not everyone likes to wake up to bright sunlight in the eyes, and street lights or car headlights can interfere with a good night's sleep. Even if you have curtains on your windows, light can still sneak through, either from the sides or directly through lightweight curtain material. You can keep this unwanted light out with some easy-to-make, inexpensive, permanent, no-sew blackout curtains.
Select curtains to use with a blackout lining. Use existing or unused curtains or purchase an inexpensive set. Do not use sheer curtains. Buy the blackout lining from a craft store or home centre.
Place a curtain panel pattern-side down on a table. Measure the curtain length and width with a ruler. Deduct 1 inch from the top only. Measure and draw a 1-inch border at the top. The lining should meet the curtain rod seam at the top, while the sides and bottom should be flush with the curtain.
Cut the blackout lining to the curtain's size with scissors. Lay the blackout material on top of the curtain panel. Line up the top with the border. Align the sides and bottom edges perfectly. Pin the lining and curtain together with straight pins. Keep pins about 1 inch from the edges.
Fold back the top blackout lining to the pins. Run several lines of fabric glue near but not on the border. The glue will spread out when you apply pressure. Press the lining in place. Fold back the lining on the right edge and repeat. Glue the bottom and left edges. Firmly press the lining and curtain together as you glue.
Lay books or paperweights on the glued edges. If the glue is heat-activated, use a hot iron to press the edges together. Allow the blackout curtain to dry; normally one hour. Slide the curtain on the curtain rod. Hang it in place over the window. Repeat with another panel, if necessary.