If you already have a curtain rod, you only need to measure from the curtain rod to where you want the curtains to end. If you do find that your window is a different length on 1 side, keep the longest measurement.

Don’t add more than 8 inches (20 cm) to the length, as hanging curtains this high can look awkward. [5] X Research source You may also want to add 4 to 6 inches (10 to 15 cm) to your length to make your curtains hang down further below the window frame, which will block more light. [6] X Expert Source Angelica SavardHome Stager, Realtor, & Interior Designer Expert Interview. 30 April 2020.

If you are installing a new curtain rod, you should plan to buy one that is at least 2 to 6 inches (5. 1 to 15. 2 cm) longer than the width of your frame.

For instance, if your frame is 3 ft (0. 91 m) wide, you will want curtains that are 7. 5 ft (2. 3 m) wide.

Make sure to get accurate measurements of your existing curtains before you buy liners.

You can hang sheer curtains on the same window to use during the day.

To hang the curtain on your rod, make another hem along the top of the curtains that is large enough to slide the rod through. If you don’t like the look of the blackout fabric, you can buy another material as well and use this as the outside of the curtain.

Hold the brackets in place and mark where the holes for the screws are on the wall. You can also trace around the edge of the bracket for further reference.

If you find that they are not even, measure and mark again.

Drill or nail a pilot hole in the place where the wall anchor will go. Make sure the hole is not larger than the anchor itself. [19] X Research source Use a hammer to gently tap the anchor into the pilot hole.

If your curtain rod did not come with screws, make sure you use screws that are the same size as the wall anchors.