Beautiful Window Pane Mirror DIY

Brad Rodriquez

Article Posted By: Brad Rodriquez

of Fix This Build That

Beautiful Window Pane Mirror DIY

Brad Rodriguez of Fix This Build That created this gorgeous window pane mirror for our DIY Challenge here on The Home Depot Blog. We asked him to come up with a fun and doable DIY project with the only requirement that it use materials from The Home Depot’s Moulding and Millwork Department.

His window pane mirror looks like something you’d find in an upscale furniture store, but, as you’ll see, you can build it in your garage in a weekend. Just follow Brad’s step-by-step instructions to create your own nine-panel window pane mirror.

How to Build This Window Pane Mirror

My wife and I have been looking for something to fill the landing area right outside our bedroom. This nine-panel window pane mirror does the job with style to spare.

The frame is made from a base of 1 x 4 and 1 x 3 material built up with chair rail and moulding to give a substantial wooden frame look and feel.

This mirror is large and in charge! It measures in at 42 in. x 42 in. and will fill an empty wall nicely. Let me show you how you can make one yourself and have a nice DIY alternative to buying a $300 mirror from the home furnishing store.

Materials for Beautiful Window Pane Mirror DIY


Cut List

  • (4) 42 in. pine 1 x 4
  • (2) 35 in. pine 1 x 3
  • (2) 10-1/8 in. pine 1 x 3
  • (4) 9-15/16 in. pine 1 x 3
  • (4) 42 in. chair rail
  • (2) 37-1/8 in. ¾ in. moulding
  • (6) 11-7/8 in. ¾ in. moulding

Step 1 – Build Mirror Frame

Cut four pieces of 1 x 4 to 42 in. long with 45-degree miters on each end.

Drill pocket holes into the ends of two of the boards, and assemble the frame with glue and 1¼ in. pocket hole screws.

Beautiful Window Pane Mirror DIY

Using a stop block on your miter saw will help make repeated cuts.

Beautiful Window Pane Mirror DIY

Clamp the boards flat to a work surface and use a right angle to ensure the frame is square.

Step 2 – Install mirror supports

From the 1 x 3 material, cut two 35-in.-long supports, two 10⅛ in. short inner supports, and four 9-15/16 in. short outer supports.

Drill pocket holes in the ends of each piece.

Beautiful Window Pane Mirror DIY

Beautiful Window Pane Mirror DIY

The long supports are attached 9-15/16 in. in from the sides. Then you fill in the short inner and outer supports, attaching them 9-15/16 in. from the top and bottom to form a tic-tac-toe board. Feel free to stop and play a game or two with a friend!

Step 3 – Modify and add chair rail to the frame

I used chair rail to build up the face of the frame, and give it a custom frame look. You’ll need to make a small modification to the chair rail for the best appearance.

Beautiful Window Pane Mirror DIY

There is a small tongue on the chair rail that needs to be removed. Using a table saw, cut the chair rail down to 2-7/16 in. wide, which will remove the tongue. In the photo above, the piece on the right is before the modification and the piece on the left is after.

Making this change will let the inner trim butt up nicely to the chair rail.

Beautiful Window Pane Mirror DIY

With the chair rail modified, cut four pieces to 42 in. long with miters on each end just like the mirror frame.

Attach the chair rail flush with the outer edge of the frame with glue and ¾-in. brad nails.

Step 4 – Add the inner trim

Next you’ll cut the inner moulding to separate the mirrors.  I used a ¾ in. x ½ in. moulding for this.  The ½ in. was a bit too tall, so I ended up planing it down to ¼-in. thick with my planer.

If you don’t have a planer, you could cut down lattice moulding or screen moulding, which are both ¼ in. thick.

Beautiful DIY Window Pane Mirror

Cut two long inner supports from the ¾-in. molding to 37⅛ in. to fit in the frame.

At this point you’ll want to pull the mirrors out and start placing them on the frame to position the short inner moulding.

Beautiful DIY Window Pane Mirror

Next you’ll cut six short inner supports to separate the mirrors.

I found all of my mirrors to be 11⅞ in. or less on each side, so make sure you are cutting the pieces to fit, but they will be around 11⅞ in. each.

Beautiful DIY Window Pane Mirror

Use glue and brad nails to attach the trim pieces to the base frame. Again, put the mirrors in place when you are installing to align the trim.

Beautiful DIY Window Pane Mirror

Here is a helpful hint: Label all the mirrors before removing them. Because of the variations in the mirrors you will want to put them in the exact same place you take them from. I used “A” through “I” to label mine.

Step 5 – Prep for painting

Beautiful DIY Window Pane Mirror

After everything is secured, go back and fill any gaps between the chair rail and frame with wood putty.

Also fill in all the brad nail holes. When the putty is dry, sand everything smooth to 150 grit.

Step 6 – Spray-paint the frame

Beautiful DIY Window Pane Mirror

Remove the mirrors and spray-paint the frame with a few coats of paint.

I used an Espresso spray paint, which we thought would look perfect on our wall.

Step 7 – Attach the mirrors

Beautiful DIY Window Pane Mirror

After the paint is dry, attach the mirrors with mirror mastic. Use enough of the mastic to firmly seat the mirrors, but avoid using too much or it could ooze around the mirrors.

Step 8 – Attach the hanging hardware

Beautiful DIY Window Pane Mirror

I used two D-hangers on the back, along with heavy duty picture wire.

I don’t know how much the mirror weighs, but it is heavy! So I made sure to wrap the windings well so it won’t come loose.

Step 9 – Hang your mirror and enjoy!

Beautiful DIY Window Pane Mirror

Beautiful DIY Window Pane Mirror

Beautiful DIY Window Pane Mirror

Beautiful DIY Window Pane Mirror

Hang your new window pane mirror on the wall, and enjoy a great decorative mirror that will open up any space and fill a wall nicely. Have fun building your own and customizing it for your space!

Brad Rodriguez discovered his passion for woodworking when he took a class in 2002. That eventually led to launching his blog, Fix This Build That. He offers a steady stream of woodworking projects for everyone from beginners to seasoned woodworkers. He lives in Nashville with his wife Susan and their three children.

See more DIY projects here on The Home Depot Blog. Follow our Easy DIY Projects board on Pinterest for more projects and inspiration.