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Picture of Wood & Concrete Outdoor Bench

This wood and concrete outdoor bench features a really sturdy base, a modern, minimalist design and it's pretty cheap to make. The concept is pretty simple: you build a mold using plywood which you cast concrete in, with J-bolts attached. Then you drill through some 4x4 wood and attach the wood to the concrete bases. Once you've made the molds you can reuse them and create more bases to make additional benches!

There's a video that goes over all the steps in detail, so make sure to watch that for a better perspective of the process.

Step 1: Making the Mold

Picture of Making the Mold
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The first step is creating the molds. I used 1/2 inch plywood and these are the cuts that you need per mold (you'll need two molds per bench, or you can reuse the same mold twice, however it's easier with two molds.)

Cut list needed per mold :

2 @ A - 14 x 17 1/2 inches (35.5 x 44.5 cm)

4 @ B - 3 x 9 inches (7.5 x 23 cm)

2 @ C - 9 x 9 inches (22.9 x 22.9 cm)

1 @ D - 17 1/2 x 8 inches (44.5 x 20 cm)

I don't know why I'm so hesitant to give concrete a try for something functional. You make it look so easy! Nice work.
Uncle Kudzu4 months ago
Very nice! And achievable by mortals.
efoster64 months ago
Love the seats now I've got make some the same but when you are mounting the bolts you should use a board that has identical holes the same spacing's and alignment as the seating boards hanging the bolts in to the cement that way you are sure that they will be vertical and the correct spacing's making for easier assemble
I was thinking the same thing. And if you use Nuts in the helical ridge to set the height of the rods you can avoid the height difference so you wont have to bring out the power tools to cut them so they don't poke out of the seats.
it's so nice and i enjoyed see your great work
in my country (better to say in the islamic republic) women cannot have your hobby
have a nice time wooden lady
AKOldman4 months ago
I don't know where you are, but the rural setting looks great! Nice, simple bench. I really like it. Hindsight is 20/20 as we have already seen in the other comments. So WTH, I'll toss out one suggestion for the future. How about using a scrap piece of 4x4, long enough to overlap the sides of your concrete forms. Drill the three, or how ever many, holes with the proper spacing and depth. Install the J-hooks then set them in the concrete. You will end up with the proper spacing between the 4x4s and the proper depth of the J-hooks so you won't have to do any cutting. Hey, I am not criticizing your work at all. I am old, disabled and take forever to get projects done because I try to find ways to make things easier for me. This idea popped into my head right away and I wanted to share it with you. I like your approach to things, I will be subscribing.
Beagles AKOldman4 months ago
AKOldman Beagles4 months ago
Thanks, and yes it is.
brookegravitt4 months ago
Looks great! I think I’d like to make one.
Chorophilia4 months ago
Great project! I was looking for something like this to put in a shady spot in our yard. Did you stain the concrete? In the final photo, it looks like it has a bluish hue? If you did color it, I'd like to know what you used.
DebB44 months ago
This is great. I would love to put it 'over' an ugly window well. Would it light enough to slide sideways to access the window well? And could the wood likely span 6 feet without sagging in the middle? I live in N. IL and if there is anyone going to make this, I would buy one from you!
mb220s4 months ago
What a great & simple idea for an attractive bench. A couple of things I would do.
1 I think Beagles has the right idea of pushing the j hooks further.
2 I would have colored the concrete. I believe paint stores or the big box stores carry concrete coloring.
3. Finishing the wood before installing them and also some kind or water sealer between the wood and concrete. "Buttering" the concrete with a thin coat of roofing tar should keep them from rotting.
Beagles4 months ago
Nice benches! A couple of points, you could push the "J" hooks down a bit more to avoid having to cut them off later. At step #7 you could finish that concrete further by parging with mortar or parging cement, both available at big box it a finished professional look.
When you use wooden forms it helps to oil them to stop the concrete from sticking, old motor oil is what I use.
rring8834 months ago
Great job and explanation! Thanks for sharing.
Kink Jarfold4 months ago
I really like the way you approach and tackle a project. As usual, a great job.
Dr Who--timeless.png
audreyobscura4 months ago
The feet on this bench came out great!