This video is a tutorial on how homeowners can create window cornice boxes from pre-primed pine. Doing so can be a great way to dress up east-facing windows. Some of the items needed to do this job include pre-primed pine boards, measuring tape, mounting hardware, and a miter saw.
Measure the width and height of the windows to figure out how big the cornice boxes should be. Then think about the design and dimensions so that it fits well and looks good.
Cut the pine boards to the desired lengths for the box’s front, sides, and the top. Remember to cut the boards with 45-degree angles at the corners for a clean and professional look. Once that’s out of the way, apply wood glue to the mitered corners of the pine boards and join them together.
Secure the joints with screws driven through the sides and into the front and top boards. Use a drill to pre-drill holes for the screws to prevent wood splitting. Once the cornice box is ready, smooth any rough edges or surfaces using sandpaper. Then, apply paint or stain to match your desired finish. Apply multiple coats if necessary, allowing each coat to dry before applying the next.
Using L-brackets or wall cleats, attach the cornice box to the wall above the window. Make sure it’s level and sits in the center. Window valances are a viable option to make things look great.