Modern Outdoor DIY Concrete Bench with Redwood Seat | Remodelaholic (original) (raw)

How To Build A Modern Outdoor DIY Concrete Bench With Redwood Bench Seat, Video Tutorial And Plans Remodelaholic

Build your own modern outdoor bench from concrete and redwood following this DIY concrete bench tutorial and woodworking plan! We show you how to make a DIY concrete bench form, then build a redwood bench seat for durable outdoor seating.

We’ve done a decent amount concrete work over the past few years, like our huge DIY patio a few years ago, and since then a couple more small sections of patio at our current house that you’ve never seen… And our amazing contributors have made some really cool projects like this concrete frame, modular mini planters, this HUGE planter big enough for a tree and finally a side table.

So, today we thought it would be fun to create an actual piece of furniture using concrete. It was our first try and for the most part we REALLY love the outdoor bench. It is modern and beautiful and we learned a few things making it, which makes us excited for our next concrete project. (And, update, it’s still holding strong 4 years later!)

Modern DIY Concrete Bench with Redwood Bench Seat - Video Tutorial and Building Plans

We made this bench for our backyard and wanted to share a tutorial of how you can build this DIY concrete bench for yourself. We’ve created full plans and instructions of how to build your own outdoor bench.

My husband and brother in law worked on the modern bench design, then built it. (Be sure to check out my brother in law’s shop, Curtis Frank Design — he makes really cool custom furniture pieces.) Get the printable DIY concrete bench plans HERE

How to Build a DIY Concrete Bench with Redwood Seat

Watch the video here first to get a good idea of the process that we took to build the modern concrete and redwood bench.

Modern DIY Concrete Bench with Redwood Bench Seat - Video Tutorial and Building Plans

Modern DIY Concrete and Redwood Bench Building Plans

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Safety note: Working with concrete requires additional safety procedures and equipment. Be sure to read and follow all instructions and notes on the product packaging.

Materials

printable concrete bench plans
(2) Bags of Quikrete 50 lb. Fast-Setting Concrete Mix (We used the fast setting mix in the red bag. If you are new to concrete don’t use the fast setting it’s too fast for a beginner.)
(1) Bucket of Water
(1) 10 oz. Bottle of Quikrete Liquid Cement Color – Charcoal (if you want to change the color a little darker)
(2) 2×6 x 96″ – Redwood Boards (these will be cut down to width)
(12) 1/4″ x 1-1/4″ Hex-Washer-Head Concrete Anchors
(1) Box 1 1/4″ Wood Screws
(6) 3″ 12-Gauge Angle Brackets
(1) 8″ 12-Gauge Heavy Strap Tie
(1/2) Sheet smooth 1/2″ plywood (for the forms)
(1) Can of Gray Spray Paint
(1) Can of Polyurethane
(1) Can of WD-40

Tools

Wheelbarrow
Shovel
5 gallon bucket
Magnesium Float
Steel Finishing Trowel
Pencil
Tape Measure
Orbital Sander
Hammer
Spray Bottle with Water
Miter Saw
Table Saw (for ripping boards to width)
Drill
Hammer Drill
3/16″ Concrete Drill Bit
Brad Nail Gun
1″ Brad Nails
150 grit sandpaper

Overall Dimensions

This outdoor DIY concrete bench measures 12″ D x 48″ W x 18″H. The poured concrete sides are 2″ thick, and the redwood bench top is 1 1/2″ thick.

Modern DIY Outdoor Redwood Bench with Concrete Legs - Video Tutorial and Plans

If you’d like to build a wider bench, you can adjust the concrete forms to be a bit wider to accommodate a full-width 2×6 board (5 1/2″ wide) instead of ripping the boards to 4″ wide like we did. (This will mean your bench seat isn’t as flat as ours, since ripping the rounded factory edges gives a really smooth bench top.)

See more DIY indoor and outdoor bench tutorials

Concrete Bench Building Instructions

The printable outdoor concrete bench tutorial and plan includes full instructions and cut lists for the concrete forms and redwood bench top, as well as assembly diagrams and finishing tips. The instructions include how to prep the concrete bench forms and pour the concrete, and how to prep and attach the redwood bench seat boards.

A few tips for building your concrete bench:

As you build the forms, remember inside dimensions are critical and be sure to use smooth plywood and screws. You can also use melamine for the sides to avoid having the forms stick to the dried concrete.

Only use the screws on the outside of the form.
Always pre-drill the holes for the screws.
Only pin nail on the inside of the form in small areas. If the hole are too big they will fill in with concrete and be harder to remove.

Lay the forms on a smooth flat surface. We used sheet metal on top of a table, and melamine also works well. This will allow the concrete on the opposite side to be nice and flat.

how to make a concrete bench with redwood seat

After pouring the concrete into the form:

Tamp concrete into every crack and corner with wood or a magnesium float. (A steel finishing trowel will bring too much cream to the top.)
Scrape off excess mud with a straight board from edge to edge.
Re-tamp and smooth with trowel.
After 20 minutes or so gently hit sides of form with a hammer. This will help raise the air bubbles to the top. You will have to do this 10 min. sooner if working with the fast-setting mix.
Vibrate the forms with a electric sander. This will also help bring the air bubbles to the top.
Smooth concrete occasionally with a finishing trowel. As the concrete sets, it can be helpful to spray it with a water bottle to keep it workable.

how to pour concrete bench legs and sides for a redwood bench seat

Get the printable DIY concrete bench plans HERE

Modern DIY Outdoor Redwood Bench with Concrete Legs - Video Tutorial and Plans

How to make a modern redwood and concrete bench for outdoor seating

Thanks for visiting our blog. I hope you found it helpful so you can build your own or one similar! Be sure to check out Curtis Frank Design on Instagram too!

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