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E-Z Frame Shed - 12' Print
Overall Skill Level: Intermediate

Guide for construction of 12x12, 12x16, and 12x20 Shed.
Build the Shed
Skill Level: Intermediate
  1. Finishing Roof
    Apply underlayment & roof edge. Apply shingles using roofing nails. Follow manufacturer's instructions (printed on bundles).
  2. Trim

    Door Trim: Using 1"x4"x8' trim pieces cut to fit vertical door trim. Miter a 45 at the top corners. Cut to fit from 1"x4"x10' trim piece, the horizontal door trim.

    Corner Trim: Using (8) 1"x4"x8' trim pieces cut to fit. Attach trim using 8D nails every 12".

  3. Roof Sheathing
    Cut (2) 4x8 roof sheathing into (4) 4x4 pieces. Along with the appropriate number of 4x8 roof sheathing: 2 for 12' building, 3 for 16' building, and 4 for a 20' building, use (2) 4x4 pieces on each side of building to stagger roof sheathing. Attach sheathing using 6D nails every 8".
  4. Gable Trim
    Locate and mark the angle of the peak on the 1"x4"x8' gable trim board and the angle where it covers the side fascia board. Nail with 8D nails. Remember again to have the top raised 1/2" over the framing to cover the roof sheathing.
    NOTE: Tack gable end pieces in place and check fit before permanently nailing.
  5. Fascia Trim
    Use the appropriate number of 1"x8"x 8' trim boards: 3 for a 12' building, 4 for a 16' building, and 5 for a 20' building, and attach to the expose ends of the roof frame members using 8D nails. Top edge of the fascia boards should be 1/2" above the top of the roof frame member. This will cover the exposed edge of the roof sheathing. Apply 1x2 nailer against building parallel with the bottom of the frame overhang. See Figure 9.
  6. Sheathing Side Walls
    Use the appropriate number of 4'x8' sheathing: 6 for a 12' building, 8 for a 16' building, and 10 for a 20' building, to attach to side wall frames using 6D nails every 8". Raise sheathing 1" from the bottom of the side-wall frame to prevent wicking.
    NOTE: If T1-11 siding is used, place cut edges at corners. Make certain end walls and frames are plumb, (vertically level) and then apply sheathing using 6D nails.
  7. Floor Sheathing

    12' and 20' Buildings
    Cut (2) pieces of 4'x8' floor sheathing into (4) 4'x4' pieces. Use these pieces along with the appropriate number of 4'x8' pieces: 3 for a 12' building, and 6 for a 20' building, to stagger floor sheathing. Floor sheathing will need to be notched to fit around side-wall frame members. Attach using 6D nails every 8".

    16' Building
    Using (6) 4'x8' sheathing attach to floor supports using 6D nails. Floor sheathing will need to be notched to fit around side-wall frame members. Attach using 6D nails every 8".

  8. Floor Supports
    From treated 2x4's cut four 21-1/4" floor supports and the appropriate number of 22-1/2" floor supports: (8) for a 12' building, (12) for a 16' building, and (16) for a 20' building. Install as shown in Figure 8 using 10D nails.
  9. Siding Front Wall
    Temporarily attach (3) 4x8 sheathing to lower portion of frame. Mark backside of sheathing around door opening. Remove sheathing and add 1"in all directions around marked area. Cut sheathing along these new lines and reattach using 6D nails every 8". To finish top portion use same steps as in step 6. See Figure 7.
  10. Endwall Siding
    Using (3) 4x8 sheathing, attach to lower portion of backwall with 6D nails every 8". To finish top portion use (2) 4x8 sheathing centered on the building and temporarily tack into place. Mark roof line along the top of the top chord. Remove sheathing and cut along these lines. Attach into place using 6D nails. Finish bottom corners later using pieces from door cut out. See Figure 6.
    NOTE: In order to prevent wicking of moisture into the sheathing, keep the bottom of the sheathing 1" above the bottom of the treated bottom frame member.
  11. Square the Building
    At base of building, measure diagonally. Adjust building until AC=BD. Building is then square. See Figure 5.
  12. Framing
    From treated 2x4's cut rim joists: 143" for a 12' building, 191" for a 16' building, and 239" for a 20' building. Place rim joists 12' apart in the intended shed area. Stand the front and back walls at the proper ends of the rim joists. Attach frames to rim joists using 10D nails. Temporarily brace both ends. See Figure 4. Place temporary bracing across roof frame members.
  13. Front Wall Framing
    Using the remaining end wall frame, repeat Step 4, using Figure 3 as a guide. NOTE: In order to keep moisture from wicking into the sheathing, keep the bottom of the sheathing 1" above the bottom of the treated bottom frame member.
  14. Back Wall Framing
    Using one frame selected as an end wall, measure and mark stud locations according to dimensions shown in Figure 2. Place the proper length 2x4 stud at those locations. Mark required length and angles. Cut each 2x4 to fit. Toe nail studs into place using (2) 8D nails top and bottom. See Figure 2.
  15. Frame Preparation
    Unfold each frame, setting aside two frames to be used as end walls. From 1"x4" Pine boards, cut Gusset plates 6" long. Use 4 plates per interior frame and 2 per endwall frame. Apply gusset plates on each side of the top and bottom fold locations. Frames to be used as end walls require only one gusset plate at top and bottom on the side opposite of the metal plates. Use four 8D nails on each gusset plate. See Figure 1.
  16. Inventory
    Separate all lumber, hardware, etc. into individual stacks of like items.
  17. General
    Prior to beginning construction, the area selected for the shed location must be leveled and cleared of obstructions.
  18. Applying Lap Siding
    Starting at the bottom of one side, measure the space between trim, cut a piece of 8" nom. siding to fit and nail on with 8D Siding nails. Continue up the wall, leaving a 6" exposure of the previous piece of siding. Continue all around the building, making sure the siding at corners are at the same level and match up.
  19. Soffit
    16' Building: Apply 1"x8"x10' and a 1"x8"x8' board. (cut to fit).
  20. Door Installation
    Use manufacturer's instructions for proper door installation.
  21. Finishing Building
    Paint and/or stain as desired.
Products, materials, techniques, tools, building codes and local regulations are subject to change; therefore, Midwest Manufacturing assumes no liability for omissions, errors or the outcome of any project. The reader must always exercise reasonable caution, follow current codes and regulations that may apply, and is urged to consult with a licensed professional before beginning any project.