Super Closeup of Wood block filling hole in exterior wall

How to a Fix Hole

in Board & Batten Siding

The easiest way to fix a large hole in board and batten siding including the products we used. Don’t be intimidated. You can do it!

We were so bummed when moving a light fixture revealed a “huge” gaping hole in our board & batten siding. But here’s the easy fix we came up with, plus the materials we used. 

Rusted, ornate, large wall light fixture
Man's arms wiring a new light fixture in place above a large hole in the exterior wall

In remodels, you come to expect the little surprises. But unlike the surprises in the Cracker Jack boxes, ours do not seem to be getting smaller.

This “little” surprise measured 4.25 x 5.3-inches. Too big to just mud over. Typical sheetrock mesh would show. We could hang a sign over it and call it a day . . . . but really? that seemed rather lame and what sign would fit between the battens and behind the new light fixture and look good.

Not that I tried finding one or anything. ha! ha!


Crayon rubbing marking the irregular outline of the hole
Two hands holding crayon rubbing cut out up against the hole to test the fit

After a week of letting that gaping hole intimidate me, I stepped back.

Way back. Like way, way, way back  — to third grade, maybe second.

Yep, crayon rubbing to the rescue. I held a piece of paper against the hole and rubbed the crayon to get the outline of the rather irregular edges of the hole. 

Full disclosure: take the time to get a fresh piece of paper and to take the wrapper off the crayon. I think I doubted whether this would really be a good solution and didn’t invest that extra 90 seconds that really would have made things easier.

Cut out and then test fit against the hole. I made several slight adjustments to the original to get as close a fit as possible.

the pattern is shown on a piece of plywood birch ready to be traced around
the drawing is shown on the corner of the wood with a hole drilled in the corner where the lines meet

Next I lined up the two straightest edges of the pattern along two edges of birch plywood and I traced around the pattern.

To make cutting this with a skill saw easiest, we drilled a small hole just to the outside of where our two cutting lines meet. This gives us an indicator when we have cut far enough and it seems to help the corner to keep from splintering.

The freshly cut birch plywood is shown fitting just inside the hole

Doesn’t this picture make it look so easy. One try, right?

Ha! More full disclosure: we had to go back and trim the original cut several times. A hand-held rasp really saved the day. It didn’t take that much time, just a bit of patience.

And now that we have a fit, the big question is how do we secure it in place?

Closup of empty hole in board and batten siding

As you can see, there is nothing to attach the new wood filler to. That hole is about 3.5-inches deep. So we need to build or attach some kind of an infrastructure to support it.

That certainly sounds very elaborate and sophisticated . . . . which our’s certainly isn’t!


The hole with a short horizontal support board clamped in place
The hole with the original support removed and a new screw hole to putty

First attempt at a support structure = first fail at a support structure!

Learn from us!!!! The filler board needs to be supported in at least two locations, either top and bottom or on the opposite sides or opposing corners.

We had hoped that because of the size of the filler board and how snuggly it fits in the original hole, that one screw would be enough. But once we had it secured in place, there was still some wobble to it that we (which actually means I) felt would be susceptible to compromise and cracks would appear with the weather extremes outside even though it is sheltered under the balcony overhang.

No big deal to take out, just meant one more hole to fix before painting.

Success fixing the hole in the board and batten. The birch plywood is shown in the hole with 2 screws attaching it to supports that are held in place with four screws.

We couldn’t take the horizontal support all the way across because the right side of the hole butted up next to a board of some variety. Above and below the opening were unobstructed, so we went with two vertical supports and attached our hole filler in not one but two spots! We held the supports in place with a clamps while we drilled in the screws. Then we backed out the screws several turns to get a bit of distance between the back of the original wall board and the supports to accommodate the slightly thicker birch plywood. But the screw heads remained below surface so they can disappear under putty and paint.


Function is done. Now for the form  — making it pretty!

The hanging bracket of the fixture is shown detached from the wall with the wires still attached
The top of the light fixture is shown with a rope suspending it from the overhead balcony, keeping it several inches from the siding

We started by detaching the new light fixture from the wall and suspending it from our overhead balcony. This gives us a couple of inches of space and eliminates the need to mess with the wiring. We covered the fixture with a couple of plastic bags to make sure it stayed fresh and clean.


A can of Duham's Hard Rock Water Putty sitting on our patio cabinet with a rag next to it and some decorative pots behind it.

I’m so grateful one of the friendly Orange Aprons at my neighborhood Home Depot suggested Durham’s Rock Hard Water Putty. (This is not sponsored, I’m just sharing a great product that I use and think is wonderful)


a paper cup held in one hand with the other hand and arm showing a craft stick with the thick mixed putty clinging to it

I mixed the Rock Hard putty in a paper cup. They suggested three parts powder to one part water. I stayed pretty close to that and mixed it thoroughly with a craft stick. Once I had it all blended, I smeared it on the holes and over all the seams. Then scraped it back off with a putty knife.


Image showing the hole in the board and batten filled and all the seams and screw holes puttied over and sanded ready for paint

I didn’t want the surface perfectly smooth because our original siding is not perfectly smooth. This was actually the trickiest, recreating the imperfections of decades of questionable paint jobs, but still wanting it fresh, clean and for the most part smooth.

The Rock Hard name is true!!! I’m glad I believed it and before the putty was completely dry, I used a sanding block on it to even out the seams in particular.

Just like with sheetrock, I used only a thin coat and came back the next day with a second thin coat and sanding. That did the trick, I did not even do a third “finishing” coat.

It took three light coats of paint to cover that deep terra cotta. And look at it now!

I know, you’re saying, what am I supposed to be looking at?

Exactly! I want you to see nothing there. Nothing, but a beautiful new light fixture to complete the patio corner makeover. You can see it all right here.

Closeup of the new light fixture illuminated and the hole impossible to see!

Now try again with the light on.

Still can’t find it can you?

I know, I’m amazed, too!!!!

full length view of cabinet with accent striping, sheer curtains hanging on brick screen wall with an oval mirror above the cabinet and a large palm with a new light fixture





Chances are you are not sitting there, right now, with a hole in your board and batten siding.


But the day may come that you need this.

For that surprise random hole that shows up.

Pin this to your “How-To Fix Anything” board.

Or to you “Brilliant Solutions” board

Or to your “Cool Products I Need to Know About” board

Pin it to wherever you will be able to find it when your Cracker Jack day arises.

Pnterest pin showing the hole in the wall with an arrow to an image of the finished wall

I hope sharing this might help you some day, perhaps resorting to a crayon rubbing to get the shape right or using Durham’s Rock Hard Water Putty to fill a hole.

My goal is to share solutions that might make your life a tad bit easier and therefore more joy-filled. It’s all about the joy (and creative thinking and problems solving)! Don’t hesitate to reach out if there is an issue at your home that needs a fix. Together, we can probably solve it.


Here's to Joy-Filled Living, Diane


  1. Victoria

    I am sitting right now with a huge hole in my board and batten siding!!

    Lol this post came in handy….. we are needing to move a light fixture just like your situation!! We will have to try this method.

    Thank you so much for posting!!!!

    • Diane

      Oh Victoria, I’m so glad you found it. I was totally taken aback with the hole behind the old light. But in very little time it was fixed and you absolutely cannot tell that hole was ever there.
      Just break it down into little steps, and you’ve got it. The most challenging part is figuring out how to get your scrap wood to stay in the front of the gaping hole. How close your hole is to one of the battens, may make a bit of a difference.
      Let me know how it works out!

  2. JCL

    Great job!! I have an A/C unit size hole to repair and plan to try your method. 😉

    • Diane

      Oh, I do hope it works for you. Please share how it goes and any modifications you needed to make for the size difference. I’d love to update my post to help more.



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