How To Make Easy No Sew Window Valance with Foam Insulation

How To Make Easy No Sew Window Valance with Foam Insulation

When you think any window in your home is a bit boring, why not try to refresh it with a decorative Cornice Board Valance? Generally, it is hard to look for an ideal style and size of a valance box in a store. Fortunately, there are a lot of DIY window valance ideas will help you. Window valance boxes are pretty easy to DIY. They can easily enhance the look of your existing curtains or a bare window. Here we’ll show you how to make the super budget-friendly window treatment: No Sew window valance from foam insulation!

#1. The first step is determining what size you want your valance to be. Determine the width of your valance by measuring the outside width of the window including the frame or wood trim around it. In my opinion, you’d better add at least 5 – 10″ to that width measurement.

Then You will also need to determine how far out from the wall you want your valance to sit. The depth depends on the type of curtains. For example, blinds require less depth than fabric curtains.



And then you should consider the height. There is a simple way to help you make the right decision for height. The standard seems to be to take the height of your window or curtains, divide that amount by 5 and take 1/5 as the height of your valance. You can also make a sample using a cardboard scrap out to the size of the valance to test the final effect of the height.

See our another article about DIY valance ideas:

20 Very Cheap and Easy DIY Window Valance Ideas You Would Love:

#2. The next step is to transfer your measurements to the foam insulation for cutting. There are pre-measured marks down the entire sheet of some foam boards that can make your measuring and cutting work easier. But even without the marks, you can also do well with the help of a straightedge. Once you’ve added the cut lines to the boards, then cut with a sharp blade or a jigsaw. To avoid snapping the foam boards and to get the cleanest edges, you’d better go slow.

#3. It is time to glue up all of the pieces – front and two sides. Attach the side pieces to the back edge along each side of the front piece. In order to hold them in place, you can grab a hot glue gun and use a few straight pins or toothpicks to add support. After the glue sets, the finished piece should look like a stubby “U” shape.

#4. Next, you need to wrap your foam box in batting (to give it an upholstered look) and fabric. Place the decorative fabric right side down and then the batting atop the fabric. Make sure your fabric and lining are large enough so that they can cover all of the foam. Place the foam box over the batting. Fold the fabric and wrap the foam box as if wrapping a gift. Make sure the pattern is straight and use the straight pins to keep the fabric taut around the box. Wrap excess fabric to the back of the boards and snip where necessary.

#5. The last step is to hang the valance box. There are two simple ways to hold it in place. One is to push a few straight pins through the side boards and into the window molding to secure the valance box in place. The other is to hang it on the wall using a single large command strip on each side due to its light weight.

Supplies You Will Need:

  • Foam insulation board
  • Hot Glue Gun and Glue Sticks
  • Pen
  • Scissors
  • Scrap cardboard(optional)
  • Straightedge
  • Utility knife
  • Straight Pins or T-Pins
  • Command strips(optional)
  • Tape measure
  • Batting
  • Decorative fabric