Easy to Build Shed Plans 10x12 Lean to

12x10 lean to shed DIY plans

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Material and Cut List

FLOOR
10 – 2×6 Pressure Treated Lumber 10′ (cut to 9′-9″)
2 – 2×6 Pressure Treated Lumber 12′ (no cut)
3 – 4×4 Pressure Treated Lumber 12′ (no cut)
4 – 23/32″ Tongue and Groove Plywood 4′ x 8′ Sheet (120SF)

WALLS
8 – 2×4 Lumber 8′ (cut to 7′-4 1/2″)
21 – 2×4 Lumber 6′ (cut to 5′-10″)
4 – 2×4 Lumber 10′ (cut to 9′-5 ")
4 – 2×4 Lumber 12′ (no cut)

SIDINGS
11 – 4′ x 8′ Plywood Siding Panel T1-11 (cut to size)

RAFTERS
7 – 2×4 Lumber 12′ (cut to 11′-10 3/8″)
4 – 2×4 Lumber 8′ (cut to size)

ROOF
8 – 2×4 Lumber 12′ (cut to 13′-8″)
3 – 2×4 Lumber 8′ (cut to size)
12 ft. Corrugated Steel Roof Panel (140SF)

TRIM
10 – 1×4 Lumber 8′ (cut to size)

HARDWARE
3 1/2″ Galvanized Steel Nails
2″ Deck Screws
2″ Galvanized Finishing Nails
1 1/2 Drilling Roofing Screws

DOOR FRAME
2 – 2×4 Lumber 8′ (cut to 6′-5 3/4″)
2 – 2×4 Lumber 8′ (cut to 6′-3 1/2″)
1 – 2×6 Lumber 4′ (cut to 3′-7″)
2 – 2×6 Lumber 4′ (cut to 3′-3″) (used for header)
1 – 2×6 Plywood Filler (used for header)

DOOR
2 – 2×4 Lumber 6′ (cut to 5′-6″)
2 – 2×6 Lumber 3′ (no cut)
1 – 2×6 Lumber 3′ (cut to 2′-5″)
1 – Door Handle or Latch
3 – 3 1/2 in. x 5/8 in. Door Hinge

WINDOW (optional)
2 – 2×6 Lumber 4′ (cut to 3′-2 3/8″)
2 – 2×6 Lumber 4′ (cut to 3′-6 3/8″)
2 – 2×4 Lumber 4′ (cut to 3′-2 3/8″)
2 – 2×4 Lumber 4′ (cut to 2′-11 1/4″)
1 – 35 3/8″ x 35 3/8″ Single Hung Vinyl Window

Step 1 – Foundation and Floor

Start with selecting a proper site for the shed foundation, ideally a flat solid surface away from any large trees.

The first step is cut all the 2x 6 lumbers as shown in the cut list or in the plan below. Next, place the three 12′ 4×4 lumbers parallel to each other at 5′ apart. Then, assemble the four 2x 6 perimeter frame on top, this will outline the overall floor frame. Drill pilot holes through the joists and secure with 3 1/2″ screws. Finally, install the eight 2x 6 floor joists at 16″ O.C.

12x10 Shed Foundation plan

Shed Foundation 3d diagram

After the floor frame is secured, cut the tongue and groove 23/32″ plywood to size and attach to the frame. You'll need about 4 full sheets to cover the 120SF floor area. These sheets usually come in standard sizes of 48″ x 96″. Insert 2″ deck screws every 8″ along the joint, don't leave any gaps between the sheets. Refer to the cut pattern below:

shed floor panel layout plan

Step 2 – Walls

Start with the front wall frame first, all frames used here are 2×4's (except the door and window header which are 2×6's).

Cut two 2×4 to 12′ in length, these will be used for the top and bottom plates. Then, cut eight 2×4 to 7′-4 1/2″ for wall studs, these will be placed 24″ O.C. Drill pilot holes through the plates and insert the 3 1/2″ screws into the studs to secure in place. Align the frame edges and make sure all corners are flush for a professional result.

See detailed Door and Window framing instructions here:

Shed Single Door Plan
Shed Window Plan

12' lean shed wall framing 3d

The 2×4 studs holding up the door header need to be cut at 6′-3 1/2″.

shed front wall frame elevation

To construct the door header, cut two 2×6 lumber to 3′-10 1/2″ length, and insert 1/2″ plywood as filler. Use wood glue and 3 1/2″ nails to to secure all the pieces together.

shed door header construction

Next up is the building up the shed's back wall. Cut two 2×4 to 12′ length, and nine 2×4's to 5′-10″ length. Follow the framing plan below.

Space the wall studs to 24″ O.C., identical to the front wall. Drill pilot holes through the plate and insert 3 1/2″ screws to secure the studs.

12' shed back wall framing elevation

Continue the build by assembling the 2 side wall frames. Cut two 2×4 lumber to 9′-5″ as top and bottom plate, then cut six 2×4's to 5′-10″ for the studs. Follow the wall frame plan below and assemble 2 sets of side walls.

lean shed 1-' side wall framing elevation

Now that all 4 wall frames are done, time to put them together!

First, line up the edges of the front and side wall frame with the floor frame perimeter. Make sure edges line up and there's no gaps, use a spirit level if needed. Then, drill pilot holes through the bottom wall plate, and insert 3 1/2″ screws to secure wall frame to the floor. After both wall frames are secured, lock the adjacent walls together by inserting 3 1/2″ screws or nails.

Repeat and assemble all 4 wall frames.

12x10 shed wall frame assembly instructions

Step 3 – Roof

Prepare and cut seven 2×4 rafters to 11′-10 3/8″ length. Then cut out 2 notches per Rafter Detail illustration below, these notches are to sit flush with top of the front and back wall frames. The rafters are designed to have an overhang of 10″ on both sides.

Tip: start with cutting one rafter first, to make sure everything fits in place.

12' roof rafter cut plan

After you've finished cutting up the rafters, place them 24″ O.C. on top of the wall frames. Then use 3 1/2″ nails to secure each rafter from the underside of the plate.

rafter installation DIY

The next step is to add blockings and top studs to stabilize the roof structure. Measure and cut out 12 2×4 blocks length to approximately 1′-10 1/2″, place between each rafters and secure with 3 1/2″ nails from the bottom.

Now, measure and cut out 2×4 lumbers to be used as top wall studs. These studs will align directly with the wall frame studs.

shed roof blockings diagram

Next up is installing the shed sidings, this is easier to do before we add the rest of the roof structures.

Measure and cut 10 T1-11 plywood siding panels to size. These shed panels interlock, so plan them out accordingly.

For the front wall siding, measure and cut out the door and window openings before installing. The rough door opening is 43 1/2″ x 77″, and the optional window opening is 2′-11 1/4″ x 2′-11 3/8″. The top notches to fit the rafters are about 1 1/2″ x 3 1/2″.

12x10 shed siding installation

Adding purlins – measure and cut eight 2×4 lumbers to 13′-8″ in length. Place the purlins 24″ O.C. on top of the rafters, and nail them down with 3 1/2″ nails. Make sure the two 9 3/4″ O.C. purlins sit directly on top of the wall frames, to close any gaps between the wall and roof.

12x10 roof purlin installations

Measure and cut 2×4 lumbers to size (approximately 20 1/2″ each), nail them in-between the purlins as blockings.

Finally, measure and cut the corrugated metal roofing panels with an angle grinder (approximately 140SF). These panels are usually 36″ in width, so overlap them to avoid gaps or water leakage. Pre-drill 3/16″ holes every 8″, and insert 2″ screws into the purlins to secure the roofing panels.

12x10 corrugated metal roofing

Step 4 – Trims, Door, and Window

Measure and cut four 1×4 lumbers to 7′-11 3/4″, and four 1×4 lumbers to 6′-4 3/4″. Align and secure these trims with 2″ nails.

As for the door trim: use a 4′-2 1/2″ long 2×6 as header trim, and two 6′-5 3/4″ long 2×4's as frame trims.

shed door frame and window trim

Add in the shed door and optional window. Refer to detailed Door and Window plans here:

Shed Single Door Plan
Shed Window Plan

12x10 lean shed completed

Step 5 – Paint

Go ahead and get creative with your new 12×10 lean-to shed!

First, wipe off any dirt or dust off the T1-11 siding surface. Prime the siding with a heavy acrylic primer, a single thorough coat will do the job. It's best to use a small brush to fill in the grooves and corners first, and then use a larger roller to cover up the flat areas. Let it sit and dry. Then apply two coats of exterior grade acrylic paint, allow enough time between coats to completely dry.

diy lean shed paint

romeroboxylisher02.blogspot.com

Source: https://buildblueprint.com/12-x-10-lean-to-shed-plans/

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