10×12 Flat Shed Roof Plans

This step by step diy project is about 10×12 flat roof shed plans. This is PART 2 of the storage shed project, where I show you how to build the flat roof for the building. Take a look over the rest of my woodworking plans, if you want to get more building inspiration. Remember that you need to select the site for the shed with attention and that you have to comply with a few legal regulations.

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

10×12 Flat Shed Roof Plans

Building a 10×12 flat roof shed

Cut & shopping lists

• G – 5 pieces of T1-11 siding – 48″x10 3/4″ long, 2 pieces – 48″x7 1/4″ long, 2 pieces – 24″x8 1/2″ long SIDING
• I – 7 pieces of 2×8 lumber – 144″ long, 1 piece of 4×6 lumber – 144″ long RAFTERS
• J – 3 pieces of 3/4″ plywood – 48″x96″ long, 3 pieces – 48″x48″ long, 2 pieces – 10″x96″ long, 2 pieces – 10″x48″ long ROOF
• K – 2 pieces of 2×6 lumber – 144″ long, 5 pieces – 6 1/2″ long 2xOVERHANG
• L – 2 pieces of 1×8 lumber – 144″ long, 2 pieces- 165 1/2″ long TRIMS
• M – 180 sq ft of tar paper, 180 sq ft of asphalt shingles ROOFING

• 1 piece of 4×6 lumber – 12′
• 12 pieces of 2×6 lumber – 12′
• 6 pieces of 3/4″ plywood – 4’x8′
• 1 piece of T1-11 5/8″ siding – 4’x8′
• 180 sq ft of tar paper, 180 sq ft of asphalt shingles
• 2 pieces of 1×8 lumber – 12′
• 2 pieces of 1×8 lumber – 14′
• rafter tie
• 2 1/2″ screws, 3 1/2″ screws, 1 5/8″ screws
• 4d nails, 16d nails, 6d nails
• wood filler , wood glue, stain/paint

Tools

 Hammer, Tape measure, Framing square, Level

 Miter saw, Drill machinery, Screwdriver, Sander

 Safety Gloves, Safety Glasses

Time

 One day

Related

• PART 1: 10×12 Shed with Flat Roof Plans 
• PART 2: 10×12 Flat Roof Shed Plans
• PART 3: 10×12 Flat Roof Shed Door Plans

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How to build a flat shed roof

Building the rafters

First, you need to build the 2×6 rafters for the flat roof shed. Therefore, mark the cut lines on the beams and then get the job done with a saw.

Fitting the rafter support

Fit a 4×6 beam to the top of the front wall and secure it into place with 7 1/2″ lag screws. Make sure you align everything with attention and leave no gaps between the components.

Fitting the rafters

Fit the rafters to the top of the shed. Place the rafters equally spaced, every 24″ on center. Align the edges with attention and use rafter ties to lock the rafters into place tightly.

Lean to side supports

Next, fit the 2×4 supports to the sides of the lean to shed roof. Cut the components at the right size and angle and then drill pocket holes at both ends of the supports. Lock the supports into place tightly with 2 1/2″ screws.

Side lean to panels

Fit the T1-11 siding sheets to the sides of the shed. Mark the cut lines on the sheets and then get the job done with a saw. Align the edges with attention and then insert 6-8d nails, every 8″ along the framing. Leave no gaps between the sheets.

Top front panels

Fit siding panels to the front of the shed, as well. Make sure you cut notches so you can fit the panels around the rafters.

Overhangs

Build overhangs for the sides of the shed. Use 2×6 lumber and cut the boards at the dimensions shown in the plans. Drill pilot holes through the long rafters and insert 3 1/2″ screws into the blockings.

Fitting the overhangs

Fit the overhangs to the sides of the shed and lock them into place with screws, after drilling pilot holes.

Fitting the roof sheets

Attach the 3/4″ plywood sheets to the top of the rafters. Align the edges with attention and leave no gaps between the sheets. Insert 1 5/8″ screws every 8″ along the framing.

Roof trims

Fit the 1×8 trims to the sides and to the back and front of the shed. Align the trims, drill pilot holes and insert 2 1/2″ screws to lock them into place tightly.

Fitting the roofing

Cover the roof with tar paper and then install the asphalt shingles. Make sure you also install the appropriate drip edges, so you can seal the shed roof. Read the manufacturer’s instructions for a tight fit.

10×12 Shed with a Flat Roof Plans – Back view

Make sure you check out PART 1 of the project to learn how to build the frame of the shed. Check out PART 3 of the project so you learn how to build the double front doors.

10×12 Shed with a Flat Roof Plans

This shed is easy to build, sturdy and it has a nice design. The lean to design will add charm to the property and it is super sturdy.

This woodworking project was about 10×12 flat roof  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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