How To Finish The Back Panel of A Kitchen Island In 3 Easy Steps

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Last updated on October 21st, 2022 at 02:21 pm

How To Add Custom Trim To Upgrade Your Kitchen Island

Are you installing a new kitchen island and trying to decide how to finish the back of your kitchen island? (Yes, I’m talking about covering that hideous seam between the two back panels! Who thought making such chintzy/cheap standard kitchen island back panels was a good idea?)

Then this tutorial is for you!

While we were renovating our house, we came across a problem when installing our new kitchen island. We bought standard paneling to cover the back of the cabinets that were exposed. We thought this would be a simple DIY project that wouldn’t take more than an hour to complete.

Ha! In the world of DIY and home improvement, nothing is ever simple or ever goes your way the first time. I know this, and yet, I still get my hopes up haha!

Unfortunately, both back panels came slightly damaged (on the factory edges that were supposed to create the seam, just our luck!). Honestly, even if they hadn’t been damaged on the edges, there was nothing that was going to hide the huge seam right in the middle!

Luckily, we thought quickly on our toes and came up with this super easy and super budget-friendly kitchen back panel idea that immediately solved our problem AND gave our kitchen island a complete upgrade!

I’d love to share with you what we did, so you can upgrade your kitchen island and make it look custom as well.

Let’s dive in!

how to finish back panel of kitchen island
I love how my island looks with barstools around it!

Quick Navigation: How To Finish The Back Of Your Kitchen Island

  1. Measure each section that needs trim & cut (dry-fit as you go)
  2. Stain/paint the trim to match your cabinets
  3. Install with brad nails
  4. Final Thoughts
  5. Related Kitchen Island Articles

Level Of DifficultyTime To Complete
Easy2 Days
Material ListTool List
Stain in your chosen color (I used Ebony from Varathane on this project because it matched our cabinets. On other projects, I’ve used Dark Walnut)Miter saw or circular saw
Polyurethane in your chosen sheen (I used satin)Pneumatic nail gun
3 pieces of ¼” thick trim in preferred width and wood type (I used 3” pine trim ripped in half so each piece was a little under 1-½” wide)Air compressor
1 piece of ¼” thick corner trim in matching width and wood type (I used 1-1/16” x 1-1/16” pine corner trim)Tape Measure
1” brad nailsMechanical Sander (optional)
Table saw (optional)
Paint tray
Two 2” Foam Brushes

Step One: Measure Each Section That Needs Trim & Cut (Dry-Fit As You Go)

The first step we took to finish the back of our kitchen island was to measure and cut each trim piece.

For our island, we knew the very obvious seam right down the middle of the back panel, the open corners where the back panel met the cabinets, and where the back panel met the floor needed to be covered.

In addition, to make it look symmetrical and natural, I also wanted it along the top (under the countertop) and on the sides of the cabinets.

To accomplish this, we bought three 8 ft pieces of ¼” x 3” pine trim. We chose this because it was cheaper to rip the trim in half with our table saw, and the resulting size was very similar to the width of the corner trim and the lip on the cabinets.

So we ripped all 3 pieces of wood in half with our table saw. If you don’t have a table saw, then just buy the trim in the width you want it to be and save yourself a step.

After the boards were ripped, we took measurements and started cutting. We measured and cut in a specific order.

how to finish back of kitchen island measure first
Look at that ugly seam! It’s standard to just let that show? No thanks, I can DIY my way around this just like you can!

The Order We Measured and Cut

  1. Corners (using the corner trim – we covered all four corners: 2 on the backside of the cabinets and 2 baby ones on the front bottom of the cabinets)
  2. Top of the back of cabinets
  3. Bottom of the back of cabinets
  4. The seam in the middle back of cabinets
  5. Top of the right side of cabinets
  6. Bottom of the right side of cabinets
  7. Top of the left side of cabinets
  8. Bottom of the left side of cabinets
  9. Small connecting pieces on the sides of cabinets that connect the bottom trim to the existing lip on the side
how to finish back of kitchen island side view
We started on the two back corners (the tallest corner pieces) then focused on the back panel with the seam in the center.
unfinished kitchen island back panel
After we measured and cut the two corners, we cut the top and bottom trim pieces, followed by the centerpiece to hide the seam.
left side of kitchen island
We worked our way around the island and cut pieces where we thought needed it. We even cut little corner pieces for the front two corners to give it a finished look.

Be sure to cut and dry-fit the pieces as you go, so you know they’ll fit correctly when you go to install. And most importantly, don’t forget to label your pieces! It’ll make installing them so much easier later on!

Honestly, you could get super creative here and do any wood design you want! You could do a board and batten style look, or funky geometric shapes, or a simple trim like we did. Decide on your design and go with it! Anything will look better than a seam sticking out or just a plain old builder-grade design.


Related Kitchen Island Articles


Step Two: Stain/Paint The Trim To Match Your Cabinets

The next step we took to finish the back of our kitchen island was to stain the trim to match our cabinets.

Once all of your pieces are cut and fit properly, it’s time to stain or paint! If you’re painting your trim, then you’re in luck. This project will go much quicker for you!

However, if you’re staining your trim to match your cabinets as we did, then it’s time to buckle down and get to work.

I recommend doing this part on some cardboard and sawhorses because it’s much easier to work while standing up than hunched over for an hour at a time (that’s how long it took me to apply each coat – an hour of straight brushing!)

Paint vs Stain

First, though, sand any edges that you cut to make sure there aren’t any splinters or rough patches. I’d also run the sandpaper over the rest of the trim that’ll be the “show parts” to make sure the paint or stain adheres really well.

Next, wipe all the pieces down, then break out your foam brush if you’re staining or your small foam roller if you’re painting. (Foam is the best for wood – it doesn’t leave yucky fuzzies in the paint or stain like other rollers will.)

Do the edges first, then brush or roll the face. If you’re painting, try to brush in one direction pulling the paint as far as possible before picking it up.

If you’re staining, swipe the stain on then immediately wipe it off with a clean rag. The longer the stain sits on the wood, the deeper the color. For my trim, it went on so dark, I had to wipe it off immediately to let the wood grains shine through still.

(We have dark (almost black) stained kitchen cabinets that I wanted to match, so we went with Ebony by Varathane.)

For paint, 3 coats should do. I recommend one coat of primer such as this Zinsser primer found at Amazon then 2 coats of Cabinet, Door, and Trim paint in your chosen color. If you use Cabinet, Door, and Trim paint, it’s meant to be glossy and durable, so an additional topcoat shouldn’t be necessary.

For stain, after the dry time listed on the can, apply 3 coats of polyurethane. I know, 3 coats seem like a lot, but your trim will appear foggy until you apply the 3rd coat. Take the time to do it now, so you can have a beautifully trimmed island for years to come!

For either application, if at any point, there are bubbles or unevenness, then sand out the blemish and apply another coat. You’ll be having a smooth, professional finish on your trim in no time!

Paint vs Stain Application

Here’s a quick reference of everything we just discussed, laid out in an easy-to-read table format for you!

CategoryFor StainFor Paint
Type of brushFoam brushFoam roller
ApplicationBrush the edges and face, then immediately wipe it off with a clean rag (let sit if a darker color is preferred)Roll the edges, then roll the face
# of coats1 coat of stain, 3 coats of polyurethane3 coats
TopcoatYes, 3 coats minimumOptional
Directions To Paint / Stain Kitchen Island Trim

Step Three: Install With Brad Nails

The last step we took to finish the back of our kitchen island was to install all the finished trim pieces with brad nails.

Once your trim is completely dry, it’s time to install! Take your labeled pieces and start installing them in the same order you cut them.

Hold the piece up, brad nail it into place, and move on to the next one. Keep going until you run out of pieces, then step back and admire your handiwork because you did it!!

back of kitchen island
Here’s the back of our kitchen island! That looks much better than that open seam and those bare corners! What do you think?
right side of kitchen island
Here’s the right side. It shows how we did the small pieces towards the front better!
how to finish back of kitchen island full view
I love my island so much more now!
kitchen island with barstools
And here is my kitchen island with our new barstools. These little faux leather swiveling and height adjusting barstools are perfect for our space. They’re comfy to sit in and I got a pack of 2 for $70! That’s pretty good for barstools in my opinion!

Once you have your beautiful new trim installed, it’s time to install the kitchen handles in less than an hour! Check out my tutorial on how to install perfectly straight kitchen handles every single time.

And once you’re done with the handles, it’s time to style your kitchen island like an interior designer! All you need is a few simple decor pieces to really make a big impact. You can find my full guide to really level up the style of your kitchen island here.

Final Thoughts On How To Finish A Kitchen Island Back Panel

Ta-da! You now have a finished kitchen island back panel! Also, you’ve got a GORGEOUS, CUSTOM-LOOKING kitchen island that you constructed all by yourself AND it only cost you $50!! Hooray for simple kitchen back panel ideas that look awesome!!

Ever since we upgraded our boring, plain kitchen island with this trim, I can’t stop staring at it. I hope you’ll feel the same way about your island as well!

Catch you in my next post!

how to finish the back panel of your kitchen island
Love this tutorial? Share it on Pinterest so others can customize their kitchen island as well!



How To Finish Your Kitchen Island Back Panel In 3 Easy Steps

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