I actually already had one corner floating shelf from way back when I first decorated our dining room. You can see the lone shelf in the original dining room post. So I used that shelf as a template for the other 2. You can determine for yourself how deep you want them.
I used plywood because it is what I had on hand and because it is light weight. If you chose to use plywood, use at least 1/2″ in thickness.
Cut out a triangle piece for the top, a triangle piece for the bottom, and a long rectangular piece for the front. I chose to also cut the edges on a 45-degree angle so the edges would be mitered instead of doing a butt joint. You can see more detailed photos of the different joints on my floating side table tutorial.
Here you can see that by cutting the edges on an angle, they meet up with the seam along the edge.
Using a brad nailer, nail them together.
Then use a wood putty to fill the nail holes. Wait for it to dry, then sand the whole shelf smooth. Make sure to use a fine grit sand paper and sand with the grain (along with the grain lines).
Once the shelves are built, you will need to create a brace to hang them with. I cut a 2×4 in half length wise and then cut them into 8″ pieces. Your braces should fit snuggly on the shelf.
I then drilled pilot holes so the wood wouldn’t split when I screwed them into the wall.
I used 4″ wood screws to attach them to the wall. I have a lathe and plaster walls and the spacing of the studs are a little different, but make sure that you find a stud to screw the brace into so the shelf will be more secure.
Make sure they are level.
The shelves should just slide right on!
When I hung the one shelf years ago I did not caulk. But it was painted almost the same color as the wall, so the slight spaces did not show as much. Walls will not always be 100% square so even if you build the shelf perfectly, you will still have small gaps in places. I decided to caulk the edges this time for a cleaner look. If I ever want to remove them, all I have to do is use a razor blade along the caulk line.
I can’t wait to show you the whole space! I am hoping to get it done this week.