A step-by-step tutorial on how to build shed walls and floor. 

Do you need more storage at your house? Maybe your garage is overflowing with stuff or you don’t have anywhere to store stuff. A solution to this storage problem could be a shed! And why not DIY it… In another post, I share how to create a blueprint (plan) for your own shed. And in this post, I will share the process of building shed walls.

build shed walls

Please remember that we are not Professionals and we are not responsible for the outcome of the project, you are!

In addition to the walls, we are going to share how to build the floor of a shed. Before we started building anything, we installed a foundation for the shed. We decided to install pavers for our foundation. But in addition to the pavers, we graveled all around the area to keep grass away and help with water draining off the roof but do what you see best for your area.

Now that you have the info about a foundation let’s talk about the floor and walls of the shed.

Disclosure: This post contains some affiliate links for your convenience, click here to read my full disclosure policy. 

Build Shed Walls plus Floor


  • treated lumber (we used 2″ x 6″)
  • .75″ plywood (subfloor)
  • 3″ exterior screws
  • 1.5″ exterior screws
  • liquid nails for subfloor
  • 2″x4″ lumber (studs)
  • 3.5″ framing nails
  • 2″ nails
  • 7/16″ sheathing (if using!)


  • miter saw
  • circular saw
  • tape measure
  • pencil
  • clamps (optional)
  • chalk line
  • drill
  • Rip-Cut (love this!)
  • air compressor
  • framing nail gun
  • hammer

Find the list of tools we use.


To build the floor of the shed, cut the treated lumber to the size on your blueprint.

TIP: When purchasing the wood figure out the length of the board that will have the least amount of waste. For example, our shed is 10ft. So we purchased two 10ft boards but then to save wood we purchased 12ft boards for the 6ft sides.

Another TIP: Rember to factor the blade width when deciding on wood lengths. I always subtract 1/8″ for any cut to a board. 

Once the treated lumber is cut, start attaching the pieces together like the blueprint, using the 3″ exterior screws to attach them together.

TIP: Mark where each edge brace will go and pre-drill 1/8″ holes before attaching with screws (you can use nails if you would like)

build floor for shed

Now it’s time to square the floor framing. To do this measure in an “X”, one corner to the opposite corner. Then see if the two other corners equal the measurement. If they have different measurements, adjust the framing and keep doing this until you have the same measurements.

square floor for shed

After the floor framing is square, its time to add the .75″ plywood. SIDE NOTE: This can be regular plywood or grooved plywood. But whatever you do the edges of the plywood need to be on a framing board. If two plywood pieces need to be placed on the same board, have the plywood piece sit halfway across the board.

The easiest way we found to cut the plywood was using a Kreg Rip-Cut or a scrap board with clamps. We used the Rip-Cut the most plus see how to use it yourself!

Once the plywood piece is the size that is needed, apply subfloor adhesive (liquid nails) to the floor framing (only where the plywood will sit). Then place the plywood in place and nail into place using 2″ nails.

add liquid nails for floor

attach plywood with screws

TIP: Make sure you are nailing where the framing is, a chalk line will help with this.

Now measure, cut, and place the next plywood pieces until the floor is completely attached.

SIDE NOTE: This is very similar to the process of the flooring when building a house. But you would use grooved plywood and would make sure your cuts/seams of the plywood are staggered for support reasons.

flooring for shed


After the floor is built the walls can be assembled. Now my wall will be different then your so I am going to give you simple instructions and tips on building the walls.

First, take a look at the blueprint you created. This should give you the measurements of each 2×4 you need to cut. The first wall you should start building is the tallest then work your way around (remember to brace the walls so they do not fall over).

SIDE NOTE: Our tallest wall was against our garage, so we added the sheathing and siding plus painted it before installing.

build shed walls

To build the wall start with the bottom and top plate (they will be the same length). Then mark where each 2×4 stud will be added to each board. Cut those studs to the length needed and place where they should go.

TIP: Most 2×4’s are not perfect so make sure all the boards are bowing the same way. Here is an article from Remodelaholic that explains this. 

Using the 3.5″ framing nails attach each stud to the bottom and top plate. Make sure they are on their marked spot. When all the boards are attached square the wall.

framing for shed walls

If you are using sheathing you would add it to the wall now (unless your wall is huge because then it would be too heavy to place). We used the circular saw attached to the Rip-Cut to make the cutting easier. Then we used the 2″ nails to attach the sheathing to the 2×4’s (framing). 

TIP: Only place nails where a 2×4 is, a chalk line will help!

create a shed

Now the wall can be moved into place. Attach the bottom plate to the floor using the 3.5″ framing nails and brace the sides so the wall will not fall over. Then you can start building the next wall.

build shed walls


  • When you frame out a door, have the bottom plate extend the whole length of the wall (no brake). This part of the bottom plate will be cut out later using a Sawzall saw. So make sure you do not nail that part of the bottom plate to the floor.
  • Also, doors and windows need extra bracing around them. This was explained when you were creating the blueprint but is are some examples of a header, trimmer, king stud, sill, and cripple. Typical framing for a wall of a shed.
  • Make sure you attach the walls together as you build them using 3.5″ nails.
  • After all the walls are built, add the double plate to the top (another 2×4) to brace the 3 smaller walls together. This will make them stronger.

And that’s if for building the floor and walls of a shed. Now we probably overbuilt our shed (yes we did!) but it was a good experience for us. I hope if you really want to build a shed you don’t hold back because you are afraid. We were worried we were doing something wrong (and we probably did) but in the end, it worked out and we now have this amazing custom shed. Please don’t let your fear stop you from trying!

add sheathing to shed wall

See how to build your own shed blueprint.

Next, up is building the lean-to roof!

Do you need more storage at your house? Maybe you need a shed. Here is how to build shed walls plus the floor. That way you can build your own shed!

Did you miss another step in this build?

  • How to create a shed blueprint
  • Building the floor & wall of a shed (THIS POST!)
  • Building a Lean-to roof for a shed
  • Installing siding and trim for a shed
  • Build a simple cedar door for a shed
  • Build storage shelves for shed or garage
  • How much does it cost to build a shed?


how to build shed walls