DIY Outdoor Sofa Full Tutorial – Bitcoin Value
Patio Furniture

DIY Outdoor Sofa Full Tutorial


DIY Outdoor Sofa Full Tutorial

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The moment you have all been waiting for! The DIY outdoor sofa tutorial. First, I want to say thank you to everyone who has commented and given me such positive feedback on our sofas! I can’t express how much your support means to me. So thank you from the bottom of my heart! And thank you for being patient with me! Now, onto the highly requested tutorial!

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First things first. You are going to need lumber and you will likely need to buy it from an actual lumber yard. We used 6x6s for the arms of our sofas and they were not available at our Lowes or Home Depot. I should also mention that we ordered all of our wood for the two sofas and the dining table at the same time and had it delivered because a) all that lumber would not fit in my Fit 😉 and B) those timbers are pretty heavy. For one sofa, you will need the following items to build them as we did.

DIY Outdoor Sofa Supply List

3 – 6x6x10 Timbers*

2 – 2x8x12 Boards

1 – 12in Sliding Miter Saw

8 – 2x6in L Angle Brackets

1pk – #8 1 1/4in construction screws

1pk – GRK 5/16in x 5-1/8in Structural Screws

1 – 3/4 in Spade Drill Bit

1 – Impact Driver and Drill **

1 – Impact Driver Extender

1 – Belt Sander

1 – Orbital Sander

1gal – PPG Timeless Semi Solid Exterior Stain in Chestnut Brown

1 – Speed Square

1– Tape Measure

1 – Safety Glasses

1 – Work Gloves

3 – Deep Seat Outdoor Cushions

3 – Outdoor Back Cushions

Decorative Pillows

*We used smooth swan Douglas fir timbers. Ours were not pressure treated, however, I do recommend using pressure treated wood. This was the biggest mistake I made on this project because our wood has since produced sap. I have been able to clean it with a wet rag once it dries but I am looking for a more permanent solution.

**Make sure both your impact driver and your drill each have fully charged batteries and have an extra standing by if possible. You will need them.

Step 1

Cut the 6x6s to size. You will need to cut the 6x6s into 8 pieces, each 32 inches long. These will be your sofa arms. We used our miter saw to cut these (ours is linked above) but the blade is not large enough to cut all the way through in one pass. So if you are in the same boat as us, you will have to rotate the wood until the blade goes all the way through. Below is a video clip of how we cut ours.



Step 2

Measure and cut the 2x8s for the seat supports and the back support of the sofa. I HIGHLY recommend purchasing your cushions before starting this step. We used these seat cushions and back pillows. If you choose different cushions than we did, you will need to adjust your measurements accordingly. This is why you should have the cushions on hand prior to making any cuts in this step.

Based on the size of our seat cushions, we cut our 2x8s to 67 inches long. You will need three 2x8s for the seat supports and one 2×8 for the back support, all cut to the same length.

Step 3

Sand all the wood smooth. We used our orbital sander on the flat surfaces of the timbers and the 2x8s.

Then, I sanded all the edges of the timbers with a belt sander to create a bevel.

I am not going to lie, this part was far from fun but gave the pieces a lot more character in my opinion. If you have never used a belt sander before I highly recommend you practice on some scrap wood first. They are pretty powerful and can damage your wood quickly if you are not careful.

Step 4

Attaching your timbers for the sofa arms. This part is a little tricky, so pay attention. We attached the timbers for the arms with screws, but before you drill any holes, determine the orientation you want for your wood. Meaning, if not all your pieces look the same on all sides or have a blemish you don’t want seen, stack them up the way you want to see them. Then when you are satisfied, flip each piece upside down and number them on the bottom so you remember the order. You will be drilling holes to attach the pieces from the bottom side of each block. This way none of the screws or holes will be seen when fully assembled. To begin, use the 3/4 inch spade drill bit to drill 4 staggered holes into block two about 3 inches deep (I actually measured mine every time so they would be the same). Remember, these are all upside down right now so you are drilling into the bottom of piece 2. Word of caution. These timbers are pretty heavy duty and take some serious force to drill into. Wear gloves and hold onto your drill tight so it doesn’t pull you unexpectedly or swing around and hit you. As I mentioned above, you will need a fully charged battery for your drill as this drains the battery pretty quick.

Now stack block two (still upside down) onto block one (also upside down). Make sure all edges are lined up and it is positioned to your liking. Then use the GRK screws to attach the two pieces. Since the holes are drilled 3 inches deep, your screw will go through block two into block one securing them together. Note, if you choose to use different screws to attach the blocks, you may have to drill different size holes.

We found the impact driver to work best for this part since you are driving the screw through 5 1/8 inches of wood, about 2 1/2 inches on each block.

From a diagram perspective, this is what you are ultimately doing. Once you have attached block two to block one, drill your holes in block three making sure to stagger them so they DO NOT line up with the holes you drilled in block two. To avoid confusion, we only drilled holes into one block at a time.

Once you have drilled the holes, stack block three on top of block two and use the screws to attach them as you did above. Repeat with the remaining block four.

Once all the blocks are attached you can flip the arm over and repeat for the second arm.

Step 5

Stain all the wood. I used an exterior deck stain to seal and stain the wood. This particular stain applied like a stain but cleaned up like a water based paint with just soap and water. A HUGE plus in my book.

I used the stain version of my favorite brush to apply the stain. And I used Dawn dish soap and a paint brush comb to clean my brush when I was done. Although this stain was not super smelly, I stained the pieces in the garage on some folding tables we had in the basement.

I applied one liberal coat to all sides and allowed 24 hrs of dry time on each side. BTW, please don’t judge me for our messy garage! The garage is on our list of spaces to overhaul someday, but for some reason it’s not high on my priority list, haha! 🙂

Step 6

Assembly. Note, these sofas are VERY heavy! I HIGHLY recommend assembling them where they will sit permanently. We made the mistake of building the first sofa in the garage and then we couldn’t move it to the backyard without help. So we assembled the second sofa in place on the patio.

Lay each arm on the ground next to each other and lay out the support brackets for the seat supports. In the photo below, the inside timbers are the bottoms of each arm. We attached the brackets just above the bottom timber based on the height of our cushions. You will also want to consider the total depth of your cushions when spacing the brackets. The placement of each bracket should be the same on the right arm and the left arm. If not, your sofa will be crooked. This means measure them 🙂

We used #8 1 1/4in construction screws to attach the brackets.

Once the brackets are attached to each arm, stand them up and use a scrap piece of wood to prop them up. You will need to be able to lay underneath the sofa to attach the seat supports.

Then lay three 2x8s across the brackets. Make sure everything is straight and square. Also, the distance from the edge of the front 2×8 to the edge of the back 2×8 should equal the depth of your cushions. Once everything is lined up, lay on the ground under the sofa and attach the brackets to the bottom of the seat supports with the same screws used above. For this part, I sat on the boards to keep them in place while Barry screwed them in from underneath.

Attaching the back support is very similar, but I HIGHLY suggest placing your seat cushions and sitting on your sofa before deciding where to put the back support, which is exactly what we did. Once we felt comfortable with it, we attached the first bracket with one screw not fully tightened straight up and down. By doing this, we could hold up the 2×8 and swing the bracket back and forth to help us decide what angle we wanted. This was a two person job so I do not have photos. Theoretically, you could leave them straight, but we wanted a more lounge like feel.

Once we decided on a angle, we used the speed square to position each bracket at the same angle. We used a 35 degree angle. Then we attached the last 2×8 to the brackets.

Step 7

Add cushions and pillows!

Step 8

Enjoy your new DIY Outdoor Sofa!

Check out the full reveal of the Backyard Makeover with source list here. You can also make the matching Outdoor Dining Table with Full Tutorial here. Curious how or DIY Outdoor Sofas are holding up? Check out my two year update and frequently asked questions here.

If you enjoyed this DIY Outdoor Sofa Tutorial, please share it on Facebook or hover over an image and save to Pinterest! And if you don’t already follow me on Instagram, Pinterest, or Facebook, I would love for us to be friends!

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This post, DIY Outdoor Sofa Full Tutorial, appeared first on Garrison Street Design Studio.

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