Home Improvement

Building a Window Cornice Box

Building a Window Cornice Box

While many people immediately revert to the 1980s when they hear the words “window cornice”, a popular window treatment at that time, the truth is that a cornice remains a great way to add character, interest, and style to a window. Although the cornice does not work for all types of home décor, it does for many. Therefore, if you were looking for a way to enhance the look of a room in your home, you might consider building a window cornice.andoverleader

You would start by measuring the size over the window for height and width, but also depth. Then, visit a local home improvement store or lumberyard to have pieces of plywood cut to size. Now, if you have a saw you could always purchase a half or full sheet of plywood, cutting the pieces yourself. For the height of the window cornice, a good rule of thumb is to measure the drapes for that window, keeping the cornice height at one-fifth. With this, the cornice would be proportioned correctly for the best visual effect. For the cut pieces of wood, use a marker or pencil to label the top and front pieces.

Next, if you plan to use crown and corner molding, which we recommend, place these in the appropriate position on the front and side pieces of the corner. On the backside of the molding, mark their position and then set them aside. This would help you know the right position for the batting that attaches to the cornice prior to fabric being added. With heavy-duty wood glue, attach each side piece of the cornice box to the front, followed by securing it in place with wood screws. Next, attach the top to the front and side already connected. Again, use glue and the follow up with wood screws.

After the cornice box has been assembled, you would need to determine the proper amount of fabric to cover the front, sides, and top. If you have fabric you want to use on hand, simply place it over the box, following the contours and then adding four inches all the way around. However, if you need to go out and buy fabric, use a measuring tape, again following the cornice contours and adding four inches all the way around.

Prior to putting the fabric on the cornice box, spray on adhesive and attach a layer of batting to all exposed areas on the front and sides. Spray a second application of adhesive, followed by adding another layer of batting. The fabric of choice would then be added, starting on the front piece, allowing four inches to hang over the bottom portion.

Keeping the fabric tight, pull the extra fabric taught around to the backside, securing it with a staple gun. Pull the fabric taught again over the top and pull the four inches of extra fabric under, stapling it in place. For the sides, pull the fabric taut to around the backside, again stapling in place. The finished cornice would have a smooth surface and no exposed areas.

To finish the new window cornice, use the crown and corner molding you had set aside. Simply measure the width of the cornice from corner to corner. Cut the molding to size, miter the ends at an angle, and after cutting, use heavy-duty glue to attach. The same would be done for the crown molding. With all molding now in place, you could paint it a color to coordinate with the fabric or if preferred, stain or leave it natural. When finished, hangers designed for cornice boxes would be installed on the wall and the cornice put into place, securing with nails or screws

Building a Window Cornice Box

While many people immediately revert to the 1980s when they hear the words “window cornice”, a popular window treatment at that time, the truth is that a cornice remains a great way to add character, interest, and style to a window. Although the cornice does not work for all types of home décor, it does for many. Therefore, if you were looking for a way to enhance the look of a room in your home, you might consider building a window cornice.

You would start by measuring the size over the window for height and width, but also depth. Then, visit a local home improvement store or lumberyard to have pieces of plywood cut to size. Now, if you have a saw you could always purchase a half or full sheet of plywood, cutting the pieces yourself. For the height of the window cornice, a good rule of thumb is to measure the drapes for that window, keeping the cornice height at one-fifth. With this, the cornice would be proportioned correctly for the best visual effect. For the cut pieces of wood, use a marker or pencil to label the top and front pieces.

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