20x20 Gable Shed Roof Plans

This step by step diy project is about 20×20 gable shed roof plans. This article is PART 2 of the 20×20 shed project, where I show you how to frame the gable roof. Add reinforcement to the roof if you live in an area with heavy snows or hurricanes. Take a look over the rest of my woodworking plans, if you want to get more building inspiration.

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

20×20 Gable Shed Roof Plans

Building-a-20×20-gable-shed

Cut & Shopping Lists

G – 4 pieces of T1-11 siding – 25 3/4″x48″ long, 2 pieces – 45 3/4″x48″ long, 1 piece – 48″x55 3/4″ long END PANELS
I – 2 pieces of 2×6 lumber – 144″ long, 1 piece – 240″ long, 2 pieces of 2×4 lumber – 20″ long, 1 piece – 44 1/4″ long, 2 pieces – 60″ long 11xTRUSS
J – 8 pieces of 2×6 lumber – 144″ long, 28 pieces – 8 1/2″ long OVERHANGS
K – 12 pieces of 3/4″ plywood – 48″x96″ long, 6 pieces – 48″x48″ long, 4 pieces – 12″x96″ long, 4 pieces – 12″x48″ long ROOF
L – 550 sq of tar paper, 550 sq of asphalt shingles ROOFING
M – 2 pieces of 1×8 lumber – 264″ long, 4 pieces – 145″ long TRIMS

11 pieces of 2×6 lumber – 20′
30 pieces of 2×6 lumber – 12′
3 pieces of 2×6 lumber – 8′
17 pieces of 2×4 lumber – 8′
17 pieces of 3/4″ plywood – 4’x8′
2 pieces of 1×8 lumber – 22′
4 pieces of 1×8 lumber – 14′
metal plate connector
2 1/2″ screws, 3 1/2″ screws, 1 5/8″ screws
4d nails, rafter ties
wood filler , wood glue, stain/paint
550 sq ft of tar paper, 550 sq ft of asphalt shingles

Tools

Hammer, Tape measure, Framing square, Level

Miter saw, Drill machinery, Screwdriver, Sander

Safety Gloves, Safety Glasses

Time

One day

PART 1: 20×20 Shed Plans
PART 2: 20×20 Gamble Shed Roof Plans
PART 3: Shed Double Doors Plans

How to build a 20×20 gable shed roof

Building-the-rafters

The first step of the project is to build the trusses for the shed. As you can easily notice in the diagram, you need to make angle cuts to the 2×6 beams. Align the edges flush for a professional result.

Truss diagonal supports

Build the diagonal truss supports from 2×4 lumber. Mark the cut lines on the beams and then get the job done with a saw.

Assembling-the-trusses

Lay the rafters, the vertical and the diagonal supports on a level surface. Leave no gaps between the components and align the edges flush. Fit metal plate connectors over the joints to lock the components together tightly.

Fitting the trusses

Fit the trusses to the top of the shed. Use a spirit level to plumb the trusses perfectly vertically. Use rafter ties to lock the trusses to the side walls. Moreover, you could install blockings between the trusses, so you can seal the shed tightly.

Gable end panels

Cut the gable end panels from T1-11 siding, at the size and shape shown in the diagram. Align the edges flush and insert 6d nails, every 8″ along the framing.

Assembling the overhangs

Build the overhnags for the shed from 2×6 lumber. After cutting the rafters, you need to attach the blockingds. Drill pilot holes through the rafters and insert 3 1/2″ screws into the blockings. You can adjust the size of the overhangs to suit your needs.

Fitting the overhangs

Fit the overhangs to the front and to the back of the storage shed. Align the edges flush, drill pilot holes and insert 3 1/2″ screws to lock them into place tightly.

Fitting the roof sheets

Fit the 3/4″ plywood sheets to the top of the shed. Align the edges flush and leave no gaps between the components. Drill pilot holes and insert 1 5/8″ screws every 8″ along the rafters.

Side roof trims

Fit the 1×8 trims to the sides of the shed. Align the edges flush and insert 2″ nails, to lock them into place tightly.

Front roof trims

Fit the trims to the front and to the back of the shed roof. Align the edges flush and insert the brad nails, so you can lock them into place tightly.

Fitting the roofing

Cover the roof of the shed with roofing felt, making sure the strips overlap at least 2″. Secure the tar paper to the plywood sheets with roofing staples. In addition, cut a large piece for the top ridge. Fit the side drip edges over the roofing felt, while the bottom drip edges should be fit under.

Read the instructions labeled on the asphalt shingle packs before installing them into place tightly. Start with the bottom left side of the roof and install them all the way to the top.

20×20 Shed Plans – Front view

Make sure you take a look over PART 1 of the project, so you learn how to build the frame of the shed. Take a look over PART 3 of the project, so you learn how to frame the double doors and how to fit the decorative trims.

20×20 Shed Plans – Side view

If you are are, I recommend you to check out the rest of my shed plans HERE. I have designed many sheds, starting with gable ones, up to lean to and gambrel ones. Moreover, I have lots of sizes to choose from.

This woodworking project was about 20×20 gable 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.