12×12 Shed Plans

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This step by step diy woodworking project is about 12×12 shed plans. This article features detailed instructions for building a 12×12 shed with a gable roof. This article features instructions about building the frame for a 12×12 shed. This is PART 1 of the project, so make sure you also take a look over the rest of the project, to learn how to frame the roof and the door.

When buying the lumber, you should select the planks with great care, making sure they are straight and without any visible flaws (cracks, knots, twists, decay). Investing in cedar or other weather resistant lumber is a good idea, as it will pay off on the long run. Use a spirit level to plumb and align the components, before inserting the galvanized screws, otherwise the project won’t have a symmetrical look. If you have all the materials and tools required for the project, you could get the job done in about a day.

 

 

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12×12 Shed Plans

Building a 12x12 shed

Building a 12×12 shed

 

  • A – 4 pieces of 4×4 lumber – 144″ long SKIDS
  • B – 2 pieces of 2×6 lumber – 144″ long, 4 pieces – 141″ long, 7 pieces – 138″ long JOISTS
  • C – 3 pieces of 3/4″ plywood – 48″x96″ long, 3 pieces – 48″x48″ long FLOOR
  • D – 2 pieces of 2×4 lumber – 144″ long, 1 piece – 137″ long, 9 pieces – 81″ long 2xSIDE WALL
  • D – 1 piece – 144″ long, 1 piece – 137″ long, 2 pieces – 46 3/4″ long, 2 pieces – 46 1/2″ long, 2 pieces – 75 1/2″ long, 6 pieces – 81″ long FRONT WALL
  • D – 2 pieces of 2×4 lumber – 137″ long, 1 piece – 144″ long, 7 pieces – 81″ long BACK WALL
  • E – 12 pieces of 5/8″ T1-11 siding – 48″x90″ long SIDING

 One day

 

 

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Build a 12×12 shed

Shed floor frame

Shed floor frame

The first step of the project is to assemble the floor for the 12×12 shed. Cut the components from 2×6 lumber. Align the components, drill pilot holes and lock them together with 3 1/2″ screws. Make sure the corners are square for a professional result.

Joists

Joists

Fit the interior rim joists. Use 2 1/2″ screws to secure the joists to the frame, leaving no gaps between the components.

Fitting the intermediary joists

Fitting the intermediary joists

Next, you need to attach the intermediary joists to the floor frame. Use joist hangers to lock the beams to the frame. Make sure you also insert 2 1/2″ screws through the perimeter beams into the joists.

Fitting the skids

Fitting the skids

In order to protect the floor of the shed from moisture, we recommend you to attach 4×4 skids under the floor. Align the skids to the floor as shown in the diagram, drill pilot holes and insert 3 1/2″ screws into the joists.

Fitting the floor panels

Fitting the floor panels

Attach the 3/4″ plywood sheets to the floor, as shown in the diagram. Use 1 5/8″ screws to lock the panels to the frame, every 8″ along the joists.

Front wall

Front wall

Assemble the front panel of the shed from 2x4s. Cut the components at the right size, using the instructions in the diagram. Drill pilot holes through the plates and insert 2 1/2″ screws into the studs. Align the edges and make sure the corners are square.

Header

Header

Use 2x4s and 1/2″ plywood to make the header. Drill pilot holes and insert 2 1/2″ screws on both sides of the header.

Back Wall

Back Wall

 

Building the side walls

Building the side walls

Assemble the side walls for the shed. Cut the 2x4s at the right dimensions and lock the together with 2 1/2″ screws. Make sure the corners are square and leave no gaps between the components.

Fitting the side walls

Fitting the side walls

Fit the side walls to the floor of the shed. Plumb the walls with a spirit level and secure them temporarily into place with 2×4 braces. Drill pilot oles through the bottom plates and insert 3 1/2″ screws into the floor.

Assembling the shed frame

Assembling the shed frame

Fit the front and the back walls to the floor of the shed. Drill pilot holes through the plates and insert 3 1/2″ screws into the floor. In addition, you need to lock together the adjacent wall frames and the corresponding top plates.

Attaching the side panels

Attaching the side panels

Attach the 5/8″ T1-11 siding to the sides of the shed. Leave no gaps between the panels and lock them to the frame with 1 5/8″ nails/screws.

Attaching the back panels

Attaching the back panels

Attach the panels to the back of the shed, as well.

Front panels

Front panels

Attach the siding panels to the front of the shed, as well. As you can easily notice in the diagram, you need to cut out the opening for the door. Mark the cut lines and use a saw to get the job done.

12x12 shed plans

12×12 shed plans

Fill the holes with wood putty and let them dry out for a few hours. Smooth the surface with 100-220 grit sandpaper and remove the residues with a damp cloth.

Top Tip: Apply a few coats of paint or stain to the components, to enhance the look of the project. Take a look over the PART 2 of the project to learn how to build the roof for the shed.

 

 

This woodworking project was about 12×12 shed plans free. If you want to see more outdoor plans, check out the rest of our step by step projects and follow the instructions to obtain a professional result.

 

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4 Comments »

  1. Ben phillips at - Reply

    Hello,
    Having a hard time figuring out the floor plan.
    Why are there 3 different lengths for the joists?

    • Julian at -

      Because I have doubled the rim joists for the shed, to add more structural rigidity. I have added an extra diagram to make it more easy to follow. If you want, you can make a regular frame, therefore cutting the joists at just two dimensions.

    • Ben Phillips at -

      Thank you Julian, this plan is great. Just finished the floor up last night

    • Julian at -

      Good luck with the rest of the project and let me know how it comes out!

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