Welcome back to the second part of our lean-to shed building series! In Part 1, we tackled the shed’s structure, including the frame, rafters, and roof sheathing. Now, in Part 2, we’ll focus on the details that bring the shed to life, installing the siding, building the doors, and finishing the roof with durable asphalt shingles. These final steps not only protect your shed from the elements but also give it a polished, professional look. Let’s dive in and complete this exciting project!
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. See all my Premium Plans HERE.
Projects made from these plans
16×20 Lean to Shed Plans – PART 2
Building-a-16×20-lean-to-shed
Cut & Shopping Lists
- H – SIDING – 5/8″ T1-11 siding 4’x’8′ – 16 pieces
- H – SIDING – 5/8″ T1-11 siding 4’x’4′ – 5 pieces
- H – SIDING – 5/8″ T1-11 siding 4’x’16” – 2 pieces
- H – SIDING – 5/8″ T1-11 siding 4’x’21 3/4″ – 2 pieces
- H – SIDING – 5/8″ T1-11 siding 4’x’33 3/4″ – 2 pieces
- H – SIDING – 5/8″ T1-11 siding 4’x’57 3/4″ – 2 pieces
- J – OVERHNAGS – 2×6 lumber 216″ – 4 pieces
- J – OVERHNAGS – 2×6 lumber 8 1/4″ – 20 pieces
- K – ROOF SHEET – 3/4″ plywood 4’x8′ – 6 pieces
- K – ROOF SHEET – 3/4″ plywood 4’x7′ – 4 pieces
- K – ROOF SHEET – 3/4″ plywood 4’x5′ – 2 pieces
- K – ROOF SHEET – 3/4″ plywood 4’x1′ – 2 pieces
- K – ROOF SHEET –3/4″ plywood 2’x7′ – 2 pieces
- K – ROOF SHEET –3/4″ plywood 2’x8′ – 1 piece
- L – ROOF TRIMS – 1×8 lumber 96″ – 2 pieces
- L – ROOF TRIMS – 1×8 lumber 120″ – 2 pieces
- L – ROOF TRIMS – 1×8 lumber 108 3/4″ – 2 pieces
- L – ROOF TRIMS – 1×8 lumber 156 3/4″ – 2 pieces
- M – ROOFING – tar paper & asphalt shingles – 450 sq ft
- N – JAMBS – 2×4 lumber 80″ – 2 pieces
- N – JAMBS – 2×4 lumber 43″ – 1 piece
- O – DOOR FRAME – 2×4 lumber 36″ – 2 pieces
- O – DOOR FRAME – 2×4 lumber 29″ – 1 piece
- O – DOOR FRAME – 2×4 lumber 73″ – 2 pieces
- P – JAMBS – 2×4 lumber 80″ – 2 pieces
- P – JAMBS – 2×4 lumber 103″ – 1 piece
- R – DOOR – 2×4 lumber 73″ – 4 pieces
- R – DOOR – 2×4 lumber 48″ – 4 pieces
- R – DOOR – 2×4 lumber 41″ – 2 pieces
Tools
Hammer, Tape measure, Framing square, Level
Miter saw, Drill machinery, Screwdriver, Sander
Safety Gloves, Safety Glasses
Time
One week
Related
- 6×8 Lean to Shed Plans
- 16×24 Run In Shed Plans
- 16×20 Lean to Shed Plans – Part 1
- 16×20 Lean to Shed Plans – Part 2
Step 3: Fitting the siding
Short-side-wall-siding
Begin by attaching the 5/8″ T1-11 siding sheets to the short side walls of the shed, starting at one corner and working your way across. Use a circular saw to make precise cuts, double-checking your measurements to ensure accuracy.
Align the edges of the siding flush with the wall framing for a seamless and professional finish. Secure the panels with 8d nails, spacing them every 8 inches along the framing to ensure a strong attachment that can withstand weather exposure. This step not only protects the shed but also enhances its overall appearance.
Side-wall-siding-sheets
For the side wall with window and door openings, carefully measure and mark the cutouts directly on the 5/8″ T1-11 siding sheets. Accuracy is crucial here, especially for the door opening, as the cutout will double as the door panel.
Use a circular saw to make clean cuts, taking care to follow your marks precisely. Align the siding flush with the wall framing and secure it using 8d nails spaced every 8 inches along the studs. This approach ensures a snug fit and professional finish while preserving the door cutout for later use.
Front-and-back-siding-sheets
Secure the siding sheets to the front and back walls of the shed, aligning the edges flush with the wall frames for a clean, seamless fit. For the door opening, measure and mark the cutout carefully on the siding before using a circular saw to cut it out with precision.
Take your time to ensure accuracy for a professional finish. Once the panels are trimmed, position them on the walls and fasten them using 8d nails, spacing the nails every 8 inches along the framing. Make sure the panels are tightly fitted with no gaps, providing reliable protection against the elements and setting the stage for the final finishing touches.
Assembling-the-overhangs
To assemble the overhangs for your lean-to shed, start by cutting 2×6 rafters to the desired length based on your overhang depth. Then, cut 2×6 blocking pieces to fit snugly between the rafters for added stability. Align the blocking pieces evenly and secure them in place with 3 1/2″ screws to create a solid, rigid frame.
Once the overhang structure is assembled, attach it to the roof frame using 3 1/2″ screws, ensuring it is tightly secured. This overhang not only shields the shed walls from weather but also enhances the overall appearance of your shed with a clean, professional finish.
Fitting-the-overhangs
Install the overhangs to the front and back of the shed, aligning them flush with the roof frame edges for a clean and uniform look. Carefully position the overhangs, ensuring they are level and centered before securing them.
Drill pilot holes through the overhangs and into the shed’s framing to prevent splitting, then fasten them using 3 1/2″ screws evenly spaced along their length. This creates a strong, stable connection that reinforces the roof structure while adding a polished, professional touch to your shed.
Roof-sheets
Begin attaching the 3/4″ plywood sheets to the lean-to shed roof at one lower corner, aligning the first sheet flush with the edge of the roof frame. Position the plywood perpendicular to the trusses and secure it using 1 5/8″ screws or nails, spacing them every 8 inches along the edges and 12 inches along the trusses.
Stagger the joints between rows of plywood to enhance the roof’s strength and stability. Drill pilot holes if needed to prevent splitting, and ensure all edges of the plywood are supported by trusses for a solid fit. Double-check that each sheet is properly aligned and flush with adjacent panels before moving to the next row, creating a durable and seamless roof surface.
Front-roof-trims
Finish the shed roof by attaching 1×8 trims to the overhangs, giving the structure a polished look. Align the trims flush with the rafters, ensuring a seamless and professional appearance. Drill pilot holes to prevent splitting, then secure the trims using 8d nails, spacing them evenly for a clean and consistent finish.
As you work, double-check the alignment to maintain uniformity on both sides of the shed. These trims not only enhance the overall aesthetic but also provide additional protection to the roof edges, increasing the shed’s durability.
Roof-trims
Attach the rest of the trims to the lean to shed roof.
Fitting-the-roofing
Installing asphalt shingles on your lean-to shed is a simple process that adds both durability and a polished finish. Start by covering the plywood sheathing with tar paper (roofing underlayment), beginning at the bottom and overlapping each row by at least 2 inches to ensure water runs off properly. Secure the underlayment with staples or nails, then attach metal drip edges along the eaves and rake edges to protect the plywood.
Begin laying shingles at the bottom edge with a starter strip (tabs removed) to prevent water infiltration, then add the first row, aligning it with the drip edge, and secure with nails above the tabs. Work upward, staggering the joints between rows for a watertight seal, using a chalk line to maintain straight rows and trimming shingles as needed for the edges and peak. This straightforward method ensures a durable, leak-resistant roof with a professional look.
Step 4: Double front doors
Door frame
Let’s build those door frames like a pro! Start by cutting 2×4 lumber to size for a sturdy, dependable structure. Drill pocket holes at both ends of the vertical and horizontal pieces to create strong, tight joints. Lay everything out on a flat surface, making sure the corners are perfectly square for a flawless fit.
Once everything is aligned, secure the pieces together by driving 2 1/2″ screws into the pocket holes. This technique ensures a rock-solid frame that’s built to last, ready to support your shed doors and handle the demands of everyday use.
Double-door-panel
Remember those panels you cut out for the front wall siding? It’s time to put them to work! Attach the panels to the door frames, making sure they’re aligned perfectly for a clean, professional look. Secure them in place by driving 8d nails evenly along the edges, locking everything together tightly.
This step not only gives your doors a polished finish but also adds strength and durability to handle whatever comes their way.
Double-door-jambs
Let’s get those door jambs installed! Grab your 2x4s and attach them around the door opening, aligning the edges so they’re perfectly flush. Drill pilot holes to prevent splitting, then secure the jambs in place with 3 1/2″ screws.
Space the screws every 8″ along the framing for a strong, tight fit. This step not only ensures a secure door installation but also gives the opening a clean, finished appearance.
Fitting-the-double-doors
It’s time to hang those double doors and bring your shed to life! Fit the doors into the opening, making sure they align evenly with the jambs for a smooth, professional finish. Secure the doors to the jambs using heavy-duty hinges—spacing them evenly along the edges for maximum support.
Don’t forget to install a sturdy latch to keep your doors secure and your belongings safe. With this final touch, your shed is ready to handle whatever you need to store.
Step 5: Side door
Shed-door-frame
Assemble the side door from 2×4 lumber, using 2 1/2″ screws and pocket holes. Use the instructions in the previous step.
Door-panel
Attach the cutout panel to the door frame. Use 8d nails to secure the panel to the door frame.
Side-door-jambs
Fit the 2×4 jambs around the door opening with 3 1/2″ screws.
Fitting-the-side-door
Attach the door into place with hinges and a latch.
Attaching-the-window-trims
Attach the windows to the openings and secure them to the frame with appropriate techniques, as described in the manufacturer’s instructions. Fit the decorative trims into place.
Step 6: Finishing touches
16×20 lean to shed – dimensions
The finishing touches are what truly bring your lean-to shed to life, adding both functionality and charm while protecting your hard work. Start by painting or staining the exterior to shield the wood from the elements and enhance its appearance. Choose a color that complements your home, garden, or landscape for a cohesive and stylish look.
Consider adding trim around the windows, doors, and corners to give the shed a polished, professional appearance. You can also install gutters along the roof edges to direct rainwater away from the structure, protecting the foundation and reducing potential water damage. For even more functionality, add a rain barrel beneath the downspout to collect water for your garden.
Inside, think about customizing the shed to suit your needs. Add shelves, hooks, or pegboards to organize tools and equipment efficiently. For larger storage needs, build sturdy racks or install loft-style storage for items you want to keep off the floor. If you envision using the shed as a workspace, consider insulating the walls and adding electrical outlets for power tools or lighting.
Don’t forget to enhance the exterior with landscaping around the base of the shed. Flower beds, shrubs, or gravel pathways can integrate the shed seamlessly into your outdoor space. You might even add a small deck or overhang for extra usability and charm.
Whether it’s a functional storage unit or a creative retreat, these finishing touches will elevate your shed, making it a valuable and attractive addition to your property.
16×20 lean to shed – free plans
Install trim around doors and windows for a polished look, and add hardware like handles and hinges to complete the doors. Seal any gaps with caulk to prevent drafts and water intrusion, and consider adding gutters to manage rainwater runoff. Inside, you can install shelves or hooks for storage and even add insulation or lighting if you plan to use the shed year-round. These final details transform your shed into a durable, attractive, and versatile space.
DIY 16×20 lean to shed plans
In the PREMIUM PLANS I show you how to build the planter boxes and the front ramp. In addition, the PREMIUM PLANS come with CUT LAYOUT Diagrams, showing how to cut the parts for your shed from the shopping list, in such a way you get minimal waste.
In PART 1, we talk about how to build the frame of the shed. Check it out, as well.
This woodworking project was about 16×20 lean to shed plans. 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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