
A wood window valance box is a great way to add some style and functionality to your windows. You can choose from a variety of materials, including wood, MDF, and PVC.
The design of a wood window valance box is quite simple, typically consisting of a flat top and a hinged door that opens to access the contents. This design makes it easy to install and maintain.
To install a wood window valance box, you'll need to measure the width of your window and choose a box that fits snugly inside. You can then attach the box to the window frame using screws or nails.
The materials used for a wood window valance box can vary depending on your budget and desired look. Some options include hardwoods like oak and maple, as well as engineered wood and wood veneer.
Consider reading: Wood Roof Truss Design
What Is a Valance?
A valance is a window treatment that sits around the top of the window, and it can be made out of wood, fabric, or even fabric-covered wood.
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Valances can be installed by themselves or over the top of curtains or blinds, giving you flexibility in how you choose to style your windows.
You can integrate the curtain rod into the valance, like I did, or sit the rod inside the window frames or forgo it altogether for a more minimalist look.
Valances are often used to add a decorative touch to a room, and they can be made from a variety of materials to match your personal style.
A valance is essentially a loose fabric that's mounted above the window like a cornice, but it's fabric that hangs softly rather than being tightly mounted to a board.
Design and Installation
The Pleasanton Custom Wood Cornices can be customized to fit your specific window or doorway needs, with a standard opening depth of 4 1/2" that can be adjusted to your liking.
To ensure a secure fit, you'll need to provide the opening dimensions, which will be used to create a custom diagram for your approval before production begins.
A cornice is also known as a valance, and all installation hardware and instructions are included with your order.
The overall width at the top of the cornice is determined by adding 7 1/4" to your opening width, while the overall height is a standard 8 3/4".
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Materials

To start building your valance box, you'll need to gather the right materials.
The primary material you'll need is 1x6 boards, which should cover the length of your valance box plus 3 1/2" for each side. If your valance is large, you'll want to have at least one support piece every 4 feet.
You'll also need 2 1/2" corner braces, one for each end and each support piece.
Other essential items include 1 1/4" wood screws and 2 1/2" wood screws. You'll also need 1 1/4" 16 gauge finishing nails.
Wood glue is necessary for holding the pieces together.
You can stain or paint the wood to match your desired aesthetic.
Product Description
The Pleasanton Custom Wood Cornices are a great addition to any room, bringing a touch of elegance to your windows or doorways.
A cornice is also known as a valance, and it's a simple way to cover door or window treatments, blinds, or other hardware.
To ensure a perfect fit, you'll need to provide the opening dimensions, which will be used to create a custom cornice.
The standard opening depth is 4 1/2 inches, but it can be customized to fit your needs.
The overall width at the top of the cornice is your opening width plus 7 1/4 inches, and the overall height is a consistent 8 3/4 inches.
All installation hardware and instructions are included, so you'll be able to put it up with ease.
Hanging a Box Valance
Hanging a box valance is easier than you think, especially if you use lightweight materials like foam. The benefit of making your window valance box out of foam is it’s so lightweight and easy to hang!
You don’t even need wall anchors, but it’s still a good idea to secure the hangers to the cornice board. I hot glued two hooks on the back of the cornice so it could simply clip up on two nails in the wall.
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However, I learned the hard way that hot glue might not be enough to hold the weight of a long cornice board. The hot glue on the hangers ended up not holding, so I would recommend sewing on your wall hangers to ensure they are secure.
If you do choose to use foam, keep in mind that it might not be stable for longer cornice boards. I would recommend using foam on cornice boards that are shorter than the one I made so that your styrofoam doesn’t get bendy and will hold.
If you prefer to use wood, you can purchase generic plywood for the front surface and generic 4″ strapping for the frame. Home Depot will cut your plywood and strapping to measure for free, which can save you time and money.
Related Products
When choosing custom wood cornices, consider the options available. The prices for these products vary, with some options available for $230.00 and others for $250.00.

The Ashton Custom Wood Cornice and Colony Custom Wood Cornice are two options available for $230.00. This is an economical choice for those looking for a custom wood cornice.
The Plymouth Custom Wood Cornice, Trend Custom Wood Cornice, and Delaware Custom Wood Cornice are all priced at $250.00. This is a slightly higher price point, but may be worth considering for those who want a custom wood cornice with a specific style or design.
Here are the related products mentioned, listed with their prices:
- Ashton Custom Wood Cornice: $230.00
- Colony Custom Wood Cornice: $230.00
- Plymouth Custom Wood Cornice: $250.00
- Trend Custom Wood Cornice: $250.00
- Delaware Custom Wood Cornice: $250.00
Step 3:
Now that you have your plywood section custom cut, it's time to put together your wooden frame. This step is as unique as the size of your box valance. Take the plywood section and outline it with the strapping boards, which provide the frame's structure.
The strapping boards should be screwed together, then attached to the plywood with sheetrock screws. This will give your frame the stability it needs to hold your box valance securely in place.
Frequently Asked Questions
What is the difference between a valance and a cornice box?
A valance adds soft, flowing fabric and color, while a cornice box provides a sleek, structured look that hides hardware and adds polish to a space. Choose between these two styles based on your desired level of formality and decor.
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