Decorating

Easy Cornice Tutorial Using Foam Board

This is such an easy way to make a cornice by following my cornice tutorial using foam board! It is very lightweight and no sewing is involved. (Our fabric ran a little short so we had to sew two edges on ours) But if you cut your fabric correctly you should not have a problem at all.

You can see the entire room reveal here

Materials:

Foam insulation board from your local hardware store 3/4″ thick to 1″ thick
– duct tape (we used silver to match the back of the foam insulation)
a curtain rod
– hot glue
– straight pins
– fabric
quilting batting

Directions:

Measure your window with a 3-4 inch overhang on each side.

Then determine the height from top of cornice to bottom as you desire.

The cornices in the kids rooms were about 2 feet in height and the cornice in the basement room reveal was only 1 foot in height.

If you have a blind in the window you probably want to make your foam cornice a little larger to cover all the hardware.

Tip- the higher you hang the cornice the larger the room feels.

How to cut the foam board for your valance

Use your measurements to cut the foam insulation to your measurements.

We used a box cutter with short sawing motions.

And get ready for lots of little foam beads.

Now cut the side pieces. These should be the depth of your curtain rod. Not any deeper or it won’t be able to hang on the curtain rod brackets.

The best way to get the right measurement is to place the main piece of foam board you just cut on a flat surface.  Place your curtain rod on top with the brackets facing up.

Grab a piece of the foam board and place perpendicular on the short side.

Make a mark just below the edge of the curtain rod edge.

Cut off the excess.

Duct taping your foam board cornice

Grab your duct tape and (with help) tape the short side pieces to the long board both inside and on the outer edge for stability.

Repeat on the other side.

You now have the base of your cornice.

Adding the batting to the foam board

Now it time to cut the batting. Place foam board down so that the short ends are holding it up.

Lay batting down and cut to size leaving about 2 inch overhang of the batting to allow the edges of the cornice to be padded as well.

Once that is the correct size proceed to cut your fabric to size. Make sure you will have extra to pull over all the edges.

Fabric for the foam board cornice

Lay the fabric on your work surface, pretty side down, then layer the batting and then the foam board.

Our fabric wasn’t long enough so we had to sew extra pieces of fabric to each side to make it long enough.

The seams hit the edges perfectly.

Grab your duct tape again and start on the short sides.

Pull fabric over and tape all edges down.

Go to the other 3 sides and repeat.

To add stability we used straight pins every so often.

For the corners we folded them in and pinned them as well.

Attaching the curtain rod

Hot glue all along top edge to attach the curtain rod.

It holds it perfectly because it is so light weight.

You can see the curtain rod is attached and it is ready to be hung!

Ta Da you are done!

Hanging the foam board cornice

Now all you have to do is hang it. The curtain rods come with simple hardware and it works great!

We are not perfectionists, we use our hands, fingers, and or arm lengths to measure things if no tape measure is handy.

In fact when we hung the one in my basement I said “my side measures 4 fingers from the edge of the window” Madeline said “mine measures 4 loosely” ok good enough!” Haha

Here is the Orange one we made for the boys room.

Here is the one in my basement.

This is one is shorter because the ceiling is lower.

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Karins Kottage

Welcome to Karins Kottage! There is always something fun going on! You would think after becoming an empty nester couple that our nest would be very quiet and empty but our Kottage nest is usually more full than what we started out with! You might find me hosting a birthday party or graduation party and a baby shower on the same weekend or a big outdoor get together with 25 of our friends and family in the backyard or maybe I might be in the kitchen trying out a new recipe for my hubby and I to grill on the BBQ for a quiet night for the two of us. I am passionate about entertaining and setting a beautiful table! I may or may not have an addiction to cloth napkins and fun salad plates oh and goblets too! I think I will always have a home decorating DIY project in the works as long as my hubby is on board with me haha. We have painted A LOT in the 6 homes we have owned in the 35 years that we have been married as well as re-done multiple pieces of furniture, added wall and ceiling treatments, replaced lights, bathroom fixtures and even tiled floors! I have sewn what seems like a million window treatments for our home as well as for family, made slipcovers, and duvets and even a formal dress or two!

View Comments

  • Thank you so much for this great tutorial. This exactly what I will do now that I’ve been less than satisfied with my efforts so far to make a valance for a super wide slider that is never used and invested too much in fabric. Thanks again.

    • Hi Sue,
      Hot glue dries very fast so I think we only waited like 5 minutes. The cornice is very light weight too so it should not be an issue. Let me know how it goes for you. :)

      Karin

    • Hi Anita, Thank you for stopping by! We loved how it turned out too! It is so fun to work on decorating projects with my daughters.
      Karin

  • This method is fantastic because I can use the existing brackets and rod and just glue the rod to the cornice! Another idea I have is to glue the rod to the cornice at the center of the cornice to raise the height of the cornice. Can't wait to try it out!! Thank you so much!

    • It has the curtain rod attached to the foam board... so you attach the brackets that come with the curtain rod to wall and hand the rod on the brackets.. just like you would if the foam board was not attached to the rod. The foam board is very light weight so it hangs nice.

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