A cornice board adds a finished look to window treatments, and if covered top, helps your windows remain energy-efficient by preventing the movement of air from over, down throughout the window. Begin with your favourite designer’s fabric creations — accessible at your local sewing shop — to present your windows their own design statement. Add exceptional embellishments for more flair.

Assess the width of this window, however, add 2 inches to that measurement for placement and add extra inches for the depth of the plank. For instance, if you utilize 1-by-4 inch framing boards, allow an extra 1 1/2 for every 3/4-inch board. Determine how tall you want the cornice board to be. A great guideline is to earn the cornice board no more narrow than one-fifth the period of the window or treatment. Now you would like it to enhance the window but not overpower it. It needs to cover the top of the window along with the hardware which keeps the curtain, shade or curtain in position. How far it extends out from the window is dependent upon the type of window treatment. A window with a colour, as an instance, only requires about a 2-inch cornice, but a window having full drapes may call for a 4-inch depth.

Cut the cornice board front, top and sides according to the measurements. Assemble the cornice board. Run a bead of wood glue on each of joints. Hammer three nails equidistant apart on the side boards of the cornice. Wipe any adhesive which runs right down the side using a damp rag.

Attach the plywood into the cornice box to finish framing it. The plywood usually goes on the front of the cornice board since it’s the widest section of the cornice box. Add the wood glue and nail at the end nails every 6 inches.

Lay the cornice board about the quilt batting material. Cut the batting so you have sufficient to cover the front face of this board and fold over the edge of this box to staple inside. Expand the batting a minimum of three inches within the cornice box.

Fold the cut batting into the inside of the box, easing it around corners. Staple in place.

Set the batting-covered box on the cloth and repeat Steps 4 and 5 for the fabric. Cut the cloth long enough so that it covers the batting with a folded, neat border. If wanted, you can cut additional pieces of cloth to staple in place on the inside of the box, provided that you fold the edges over before stapling.

Expand your cornice box into the window using L-brackets. Because king and jack studs are typically located next to this window, should you keep the cornice box within 2 stud widths of the window’s border, you can screw the L-brackets directly into the wall to guarantee the cornice box into those studs.