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5 steps How to make a window apron with foam sheets


If you think a window in your home is a bit boring, you can freshen it up with a decorative Cornice Board Valance. In general, it is difficult to look for the ideal style and size of valance box in a store. Fortunately, there are lots of DIY window valance ideas that will help you. Window valance boxes are pretty simple to tinker with. You can easily develop the look of your existing curtains or a bare window. Here we show you how you can carry out the super budget-friendly window treatment: Do not sew a window valance made of foam insulation!

# 1. The first step is to determine what size your valance should be. Determine the width of your valance by measuring the outside width of the window including the frame or the wood paneling. In my opinion you should add at least 5 to 10 inches to this width measurement.

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

And then you should consider the height. There is an simple way to make the right decision for the 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 of cardboard waste to the size of the valance to test the final effect of the height.

Read our other article on DIY valance ideas:

20 very affordable and simple DIY window valance ideas you would love:

# 2. The next step is to transfer your cutting measurements to the foam insulation. There are pre-measured markings on the entire film of some foam sheets, which can make measuring and cutting easier. But even without the markings, you can cut well with a ruler. Once you've added the cutting lines to the boards, cut with a sharp saw blade or jigsaw. You should slow down to avoid snapping the foam sheets and getting the cleanest edges.

# 3. It's time to glue all the parts together – on the front and on two sides. Attach the side panels to the back edge along each side of the front panel. To keep them in place, you can take a hot glue gun and use a few straight pens or toothpicks to add support. After the glue has hardened, the finished piece should look like a blunt U shape.

# 4. Next, you need to wrap your foam box in cotton wool (to give it a padded look) and fabric. Place the decorative fabric with the right side down and then the cotton wool on the fabric. Make sure your fabric and lining are large enough to cover all of the foam. Place the foam box over the cotton wool. Fold the fabric and wrap the foam box like a gift. Make sure the pattern is straight, and use the straight pins to keep the fabric taut around the box. Wrap any excess fabric on the back of the boards and cut it off if necessary.

# 5. The last step is to hang up the valance box. There are two simple ways to keep it in place. One is to slide a couple of straight pins through the side boards and into the window ledge to secure the valance box in place. The other option is to hang it on the wall with one large command strip on each side due to its light weight.

Accessories you need:

  • Foam insulation board
  • Hot glue gun and glue sticks
  • pen
  • scissors
  • Old box (optional)
  • ruler
  • Utility knife
  • Straight pens or T-pens
  • Command bars (optional)
  • Tape measure
  • Beat
  • Decorative fabric


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