How to Assemble and Upholster a Cornice Box

Transform your windows for the season with these simple upholstered cornices.


Materials and Tools:

carpenter's pencil
sanding block
nail gun
staple gun
hot glue gun
3/4" MDF ultra-light
180-grit sandpaper
wood glue
pin nails
gold braided trim
glue sticks


1. Trace your desired shape onto 3/4-inch thick MDF board. Cut out the desired shape with a jigsaw, including the side pieces.

Note: You should have one large front piece and two short side pieces.

2. Lightly sand the edges.


3. Create a three-sided box by attaching the front board to the sides with wood glue and secure with a nail gun.

4. Wrap the assembled cornice box with batting and secure onto the backside with a staple gun. Repeat the process with the fabric.

5. Use the jigsaw to cut out a small oval from the MDF to create a medallion. Wrap in batting and fabric, securing with a staple gun.

6. Attach the upholstered medallion onto the center of the upholstered cornice box, securing with a nail gun.


7. Finally, attach gold braided trim with the hot glue gun in a circular pattern to cover all nail holes.

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