How to Make Casement Curtains
Casement curtains attach to the window sash. This two-panel treatment works for windows that open in the middle and swing outward, but you can also use one panel of this style for a glass-paneled door. This project attaches at the top and bottom so you’ll need to create two rod pockets and use two rods.
The best fabric choice for these types of curtains is a sheer fabric, such as a thin cotton like voile or batiste. The gathers formed by the fabric allow in light, yet still provide privacy — the more gathers, the less light.
To use this treatment on casement windows, carefully measure your window’s interior sash area. Make sure your window is deep enough to allow for the mounting of a sash rod. (A sash rod is a thin, no-show, inside-mount rod.) If you’re covering the glass area of a French door, attach thin cafe rods on the wood of the door, above and below the glass area, before you start, and then measure the distance in between to determine length. (A cafe rod is a slim decorative outside-mount rod, with finials.)
To determine your width measurement, add 4 inches to your window sash width measurement to account for the seam allowances on each side of the two panels. For your length, add 4 inches to the length (doing so accounts for the rod sleeve at both the top and bottom).
For a casement window measuring 30 x 60 inches, cut two panels to each measure 17 (include an inch on each side for the seam allowance) x 64 inches.
If you want a flat, ungathered panel, this amount of fabric is enough. If you want a more gathered look (which gives more privacy), multiply your width by 1-1/2.
To create your casement curtains, follow these easy steps:
Cut your fabric into panels, using the measurements you’ve determined for your window.
Hem your panels, using a 1-inch seam allowance and employing the fold-and-fold method of creating a hem.
Fold the top and bottom of each panel back 1/2 inch and press with a hot iron.
Fold the top and bottom back another 1-1/2 inches and press with a hot iron.
Stitch along the top and bottom to create a rod sleeve.
Slide your sash or cafe rod through each sleeve and hang.