Fitting drapery to a triangular window can be a challenge. If you can sew straight seams, you can make two triangular panels that will fit your window. Then think outside the box and hang them using two rods per panel, and you'll have created a decorative, functional solution to covering your large triangular window.
Things You'll Need
Scissors or rotary cutter and mat
Two straight curtain rods with brackets
Two cafe rods with brackets
Four extra cafe rod brackets
Making Drapery For a Triangular Window
Measure the width of the window at the base, the height of the window from the point of the triangle to the bottom, including the frame, and the length of a side. Add 4 inches to the width and height measurements, and double the side length measurement.
Cut 2 pieces of fabric according to your measurements. If your fabric isn't wide enough, you'll need to sew 2 or more pieces together. Since the drapery will be softly gathered, the seams won't be noticeable. Be sure to allow 1 extra inch in your measurements for each seam.
Press under 1/4 inch along the height-measurement edge of one piece. Then press under 1 3/4 inches. Sew along the pressed-under edge. Repeat with the other piece.
Press under 1/4 inch along the side-length measurement edge of one piece, and then press under 1 3/4 inches. Starting at the seam you made in Step 3, sew along the pressed-under edge. Repeat with the other piece.
Press under 1/4 inch on the width-measurement edge of one piece, and then press under 3 3/4 inches. Starting at the seam you made in Step 3, sew along the pressed-under edge, stopping at the seam you made in Step 4. Repeat with the other piece.
Hanging the Drapes
Hang the drapes by attaching straight curtain-rod brackets to the window frame, on the inside or outside, along each angled side of the window. Attach 2 cafe rod brackets to the point of the window, 2 cafe rod brackets to the center bottom of the window, and 1 cafe rod bracket to the bottom of each side edge of the window, on the inside or outside of the frame. The cafe rod brackets at the bottom side edges should be placed outside the straight-rod brackets.
Insert a straight curtain rod into the pocket you made on the long side of each panel. Insert a cafe rod into the pocket you made on the height-measurement side of each panel. Hang the straight rods on their brackets. Hang the cafe rods on the brackets at the point of the window.
Fasten the curtains open by attaching the cafe rods to the cafe rod brackets on the bottom side edges of the window frame. To fasten the curtains closed, attach the cafe rods to the cafe rod brackets at the center bottom of the window frame
If your window height is greater than the longest cafe rod available, use 1/2-inch PVC pipe. Close each end of the pipe by gluing on a button or other disc, and glue a cup hook over it to fit through the opening on the cafe rod bracket.