Let’s begin with the materials list that you’ll need to build this shed :
– Pressure treated skids (4×4)
– Pressure treated floor joists (2×4)
– Exterior grade plywood flooring 3/4”
– Top plates, bottom plates, studs, header, trimmer studs, cripple studs, rafters, subfascia (2×4)
– T1-11 exterior siding 5/8”
– CDX roof sheathing 1/2”
– Fascia (1×4)
– Corner and door trim (1×3)
– Drip edge and 15 lb roofing felt
– Asphalt shingles
– Galvanized nails
– Door hinges and latch
– Paint or stain
Step.1.FRAME THE FLOOR
Cut two pressure treated 4 by 4s to 5 feet long for skids.Do the same with two pressure treated 2 by 4s for the rim joists.Cut six floor joists to 45 inches long and position them between the rim joists, 16 inches on center; secure with 16d nails.Place the frame on the skids, shim it level as required, square it up and toenail the floor joists to the skids.Cover the frame with 3/4 inch exterior plywood.
Step.2.BUILD THE WALLS
For the back wall, you must cut 6-foot-long top and bottom plates and lay out studs 24 inches on center.The wall studs are 8 feet long, with their top ends angled at 18 degrees.Build the back wall and nail to the floor frame, bracing as necessary.
For the front wall, cut the top plate 6 feet long and two bottom plates each 1 foot long.Mark a 4-foot-wide door opening and the stud positions.Cut four wall studs to 81(1/4) inches long, plus two 71(1/2) inch long trimmer studs.Also cut two 51-inch-long 2 by 4s, plus a same size strip of 1/2 inch thick plywood as a spacer, and nail them all together for a header.Assemble the wall and attach the header, then add four criple studs on top as shown on the facing page.Secure the front wall to the floor and brace as needed.
Build the side walls with 41-inch long top and bottom plates and 81(1/4) inch long studs.Attach them to the floor.When the wall sections are square and plumb, nail or screw the corners together.
Step.3.FRAME THE ROOF
The roof framing consists of 2 by 4 rafters that rest on the front and back top plates.Cut four rafters as shown on the facing page.Toenail them to the top plates every 24 inches.Then cut a 2 by 4 gable stud to fit between the end rafter and the top plate of each side wall.Next, cut the 2 by 4 subfascia to length and attach it to the front ends of the rafters.
Step.4.ENCLOSE THE WALLS
Next cut pieces of T1-11 siding to cover the front and the sides; save the cutouts to make the doors.Position the siding flush with the bottom of the rim joists and attach it with 8d galvanized nails every 8 inches or so.
Step.5.INSTALL THE ROOF
Use 1/2-inch CDX plywood to sheath the rafters, using 6d nails.Cut the side (or rake) trim to cover the exposed edges of the roof sheathing, and attach.Also cut and install the front fascia, aligning its bottom edge with the bottoms of the side rakes.Install drip edge and 15-pound roofing felt, and apply the shingles.
Step.6.ADD DOORS AND TRIM
Using left-over siding scraps, build a pair of doors to fit the opening, trimming them out with 1 by 3s.Cut and instal 1 by 3 trim along the shed’s front corners and back edges, then around the top and both sides of the door opening.Prop the doors in the opening with wood shims or blocks and check the fit; they would be snug on the side and have about 1/2 inch of clearance top and bottom.Finally attach, the doors with strap hinges and add a door latch.
RESUME : The floor frame for this small shed will rest on pressure-treated skids instead of a fixed foundation.If your site is sloped or has poor drainage, first excavate soil to a depth of 4 inches and replace it with gravel, then place your skids and floor atop that.Next, frame the walls and roof on top of the level platform and enclose them with plywood siding and asphalt shingles.Finally, build and hang a simple door and tidy things up with a little trim.
PS: Enjoy your new lean-to shed.