# How do you make a cornice out of foam board?

## How do you make a cornice out of foam board?

Instructions

1. Measure the length of your window and add a foot to that. ...
2. Figure out the width that you want the cornice to be. ...
3. Make the corners of your cornice by carefully cutting in 6 inches on each side. ...
4. Wrap a thin batting around the foam board frame. ...
5. Next, wrap the fabric around the batting. ...
6. Hanging!

## How do you calculate yardage for a valance?

Divide the cut fabric width by the width of the chosen fabric for the number of widths required. Multiply that number by the cut fabric length. Divide the result by 36 for the number of yards of fabric required for a self-lined gathered valance.

## How many inches should a valance be?

Another rule of thumb used by decorators is that the window valance depth should be 1/4 of the overall window height, plus 1 inch. A 60-inch tall window, then, would call for a 16-inch deep valance, while a 48-inch window calls for a valance about 13 inches deep.

## What sizes do valances come in?

Valances can come in all shapes and sizes. But is there such a thing as a standard size of a window valance? If you're shopping for ready-made valances, the most common standard size you'll likely come across is a 50-inch wide valance. If you're hiring a custom workroom, you can specify any size.