The mitered corner is the hallmark of high-end draperies, considered a finishing touch which identifies your drapes as custom-made. In addition, it reduces the bulk from the drape corner and on the side hems and creates a wide edge facing — desirable components in drapes. A savvy homeowner can produce mitered corners with confidence that the result will be equivalent to custom-made drapery corners.
Assemble the drapery panel with a single-layer bottom hem and a single-layer side hem of equivalent widths.
Turn the hem up throughout the base of the drape and press on the bend, creating a sharp bottom hemline.
Turn the side hem in, from the top to the base of the drape and press the bend, creating an extremely sharp pressed edge. Open the hems.
Lay the panel on the table with the bottom edge toward you and the right side of the cloth observable.
Mark the ideal side edge 18 inches up from the bottom right-hand corner of the drape on the ideal side of the cloth. Mark the bottom hem 18 inches to the left of the identical corner, on the ideal side of the cloth.
Place a pin through the drape, from the wrong side to the ideal side, in the point at which the outside edge and underside creased hem lines intersect.
Align the bottom hem edge with the hands outside border by aligning the two marks. Make certain that the drape is laying flat along the diagonal fold created via this aligning.
Place the outside edge of the long arm of a carpenters square along the diagonal bend of the drape, the corner of the square on the pin. Draw a line from the pin into the outside edge of the drape, along the base of the brief arm of the square, creating a line onto a 90-degree angle in the folded edge.
Sew on this line and trim the cloth back to a 1/2-inch seam allowance. Press the seam open.
Turn the hem into the incorrect side of the cloth. The sewn seam creates a miter in the bottom corner edge.