Window cornices. Window valance. Window box. My husband calls it the thing above the window. Whatever you call it, they’re awesome and they add so much to your window! There are so many different ways to build and hang these. I was a little intimidated about building one of these because I wasn’t sure how to attach it to the wall and I wasn’t sure if it would actually look ok if it were made of foam board. I mean who can make something awesome out of foam poster board?! I should have done these a loooooong time ago-they’re so easy and so cheap and they surprisingly look great!
Here’s how Presley’s turned out:
You can check out Presley’s room reveal here.
Kylie’s cornice turned out awesome too and I can’t wait to share her room with you guys as soon as I’m finished. Buuuuuuut I did do a terrible job the first time around on Kylie’s window cornice… I learned a few things not to do so I thought I’d share. It looked pretty bad at first, I’ll just be real with you. Here’s a tiny sneak peek of Kylie’s before and after:
I made my window cornices out of foam poster board, wrapped with quilt batting and fabric around it, attached the fabric and batting with duct tape/quilting pins to the foam board and the cornice box rests on 2 L brackets. No power tools necessary this time. 😉
- $3 for 3 Foam poster board (In Kylie’s room I used 3 foam boards from dollar tree-they worked just as well as the name brand from walmart that I used on Presley’s room but didn’t cost 3.50 a piece)
- $5.97 Quilt Batting (there’s so much in 1 package. I’ve used it for 2 cornices so far and can make another maybe 2 more from it)
- $8 for 2 yards of fabric (I realized recently that Walmart has a small section of home upholstery fabrics for $3.97 a yard. They’re thick and the patterns are great.)
- $3 Ball head pins (you can totally use straight pins but they hurt your fingers after awhile. I liked the pins with the little ball on the head.)
- Regular pins
- Ball head pins
- L bracket or curtain rod brackets (I had some of those curtain rod brackets in my garage not being used so I used them for this. You could buy a cheap L bracket from Lowe’s or Home Depot if you don’t have something similar. They’re like $3 for a pack of (2) 4″ L brackets
- Curtain rod brackets:
- L bracket:
- White duct tape (I used purple duct tape from our junk drawer on Kylie’s the first round and had thin yellow fabric-I could see the tape through it. Dark tape is not the best choice with thin fabric. I had to recover it with another fabric and I loved it- I left the purple duct tape with the thick fabric. But use white duct tape if you have thin fabric.)
- Measuring tape
Here’s how I did it:
Measure your window width first so you know how much fabric and foam board to buy! My window was 38″ wide. Once you’ve measured your window, you’ll want to think about how much space you want on both sides of your window for your curtains. I added 6″ of space on the left and 6″ of space on the right for my curtains to hang. Then you’ll want to think about how deep you want this cornice box to be. I learned the hard way that you don’t want it too deep…it will sit off your wall too far and leave the curtains looking empty. In Kylie’s room I thought 8″ would be good but it was soo big and weird looking. Honestly it looked terrible all around the first time. See….
After some trial and error, I found that I personally like 4″ of depth on my cornice boxes. So in my case we had this measurement for the cornice box:
- 38″ window
- + 6″ on the left side of the window
- + 6″ on the right side of the window
- + 4″ depth on the left
- + 4″ of depth on the right
- =58″ of poster board length
I duct taped my foam board together and got to measuring. I didn’t have much height to take advantage of in these bedrooms, the windows are pretty close to the ceiling, so my cornice boxes were 12″ tall.
I cut my sides and then scored the top line. I opened the scissors and ran it across my top line so it would bend over easily then duct taped it. This top piece will also end up being 4″ deep. It’s what will rest on the L brackets.
It’s faster to do this same thing with the sides-scoring instead of cutting the sides off. But I did it wrong the first time and it ended up being ok it just added extra work. I attached my 4″ side pieces with duct tape just like the top. Then I wrapped quilt batting around my cornice box and used duct tape and pins to hold it on there. Make sure you don’t leave too much batting overage on the inside of your box. You’ll want your fabric to be slightly longer than your batting so it can be taped and pinned to the foam board and not the fabric taped to the batting. That won’t work very well…I did that wrong the first time too. Here’s what your box should look like after you’ve wrapped it with the batting:
Then I carefully laid my fabric out and wrapped it around the outside of the quilt batting. If you have a pattern in your fabric use the pattern to make sure you get a straight line on the edge of your cornice box. You don’t want a crooked looking box.
I made my fabric extend out past the quilt batting so I could use more tape to attach the fabric to the foam board (I ran out of duct tape so I used clear packing tape). I put a yellow pin every inch or so to make sure it would stay in place.
I hung my curtains first. Then held up the cornice box to see how high or how low I wanted it. I decided I wanted it to overlap the very top trim of the window. Then I drilled the curtain rod brackets (the ones that the cornice box would sit on, not the curtain rod) to the wall, I separated them evenly. They’re basically right above the window corner. You can see it here:
Then just set the cornice box on top of your L brackets or extra curtain rod brackets. I’ve seen some people duct tape their cornice box to the L bracket but I haven’t found that I’ve needed to do that. Neither of ours have budged. Both of our girls use their blinds to shut the sun out and not actually the curtains. We just bought the cheap $3.99 mesh curtains from ikea to have something soft feeling there. They’re 96″ long so I just trimmed them with the scissors to fit their rooms.
Here’s how Kylie’s cornice box turned out and a little sneak peek of how her Snow White room is turning out…I can’t wait to show you guys the whole thing. Squeeeeee!! I’d love to hear how yours turn out! Let me know if you have any questions!