16×20 Gable Shed Roof Plans

This step by step woodworking project is about free 16×20 gable shed roof plans. This is PART 2 of the large gable shed project, where I show you how to build the trusses and how to fit them into place tightly. Moreover, in this article I give you tips on how to fit the decorative trims to the roof. See my other DIY projects HERE.

We recommend you to invest in the best materials you could afford. Therefore, you should buy weather-resistant lumber, such as pine or cedar. Always take accurate measurements before adjusting the size of the components at the proper size. Drill pilot holes trough the components before inserting the wood screws, to prevent the wood from splitting. See all my Premium Plans HERE.

Made from this plan

16×20 Gable Shed Roof Plans

Building a 16×20 shed

Materials

• H – 4 pieces of T1-11 siding – 32″x48″ long, 4 pieces – 48″x59 3/4″ long ENDS
• I – 22 pieces of 2×6 lumber – 130″ long, 11 pieces of – 185″ long TRUSSES
• I – 4 pieces of 2×4 lumber – 7 1/4″ long, 22 pieces of 2×4 lumber – 21 1/4″ long, 4 pieces – 35″ long, 18 piece – 48″ long SUPPORTS
• J – 8 pieces of 2×6 lumber – 130″ long, 36 pieces – 8″ long OVERHANGS
• K – 8 pieces of 3/4″ plywood – 48″x96″ long, 4 pieces – 48″x48″ long, 4 pieces – 30 3/4″x96″ long, 4 pieces – 48″x30 3/4″ long, 4 pieces – 11 1/2″x96″ long, 4 pieces – 11 1/2″x30 3/4″ long ROOF
• L – 500 sq of tar paper, 500 sq of asphalt shingles ROOFING
• M – 2 pieces of 1×8 lumber – 263 1/4″ long, 4 pieces – 132″ long TRIMS

• 30 pieces of 2×6 lumber – 12′
• 11 pieces of 2×6 lumber – 16″
• 3 pieces of 2×6 lumber – 8′
• 15 pieces of 2×4 lumber – 8′
• 4 pieces of T1-11 siding – 4’x8′
• 16 pieces of 3/4″ plywood – 4’x8′
• 4 pieces of 1×8 lumber – 12′
• 2 pieces of 1×8 lumber – 20′
• 2 1/2″ screws, 3 1/2″ screws, 1 5/8″ screws
• 4d nails, rafter ties
• wood filler , wood glue, stain/paint
• 500 sq ft of tar paper, 500 sq ft of asphalt shingles

Tools

• Safety gloves, glasses
• Miter saw, jigsaw
• Chalk line, tape measure, spirit level, carpentry pencil
• Drill machinery and drill bits

Time

• One Day

Building a gable shed roof for a 16×20 shed

Building the rafters

The first step of the project is to build the rafters for the gable roof of the storage shed. Make 30 degree cuts to both ends of the rafters. Afterwards, make the birdsmouth cuts to the rafters, so you can fit them into place tightly.

Assembling the trusses

Build the bottom rafters from 2×6 lumber, as well. Make cuts to both ends of the 2×6 beams and then lay them on a level surface. Align the edges flush and leave no gaps between the beams, for a professional result.

Fitting the truss supports

Use 2×4 lumber for the truss supports. Make the angle cuts to the supports and then fit them into place.

Fitting the gussets

Use 1/2″ plywood for the gussets. Mark the cut lines on the plywood sheets and get the job done with a circular saw. Fit the gussets over the joints and secure them into place with 1 5/8″ screws.

Fitting the trusses

Fit the trusses to the top of the shed. Use a spirit level to plumb the trusses and place them every 24″ on center. Use rafter ties to secure the trusses into place tightly.

Gable end panels

Cut the panels for the gable ends from T1-11 siding. Mark the cut lines on the sheets and get the job done with a saw. Align the edges flush and insert 6-8d nails, every 8″ along the framing, so you can lock the panels into place tightly.

Assembling the overhangs

Build the overhangs for the shed from 2×6 rafters and 2×6 blockings. Drill pilot holes through the blockings and insert 3 1/2″ screws into the blockings.

Fitting the overhangs

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

Fitting the roof sheets

Fit the 3/4″ plywood sheets to the top of the large storage shed. Align the edges flush and leave no gaps between the sheets. Drill pilot holes and insert 1 5/8″ screws, so you can lock the panels into place tightly.

Side roof trims

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

Front and back roof trims

Build the trims for the front and to the back of the shed. Align the edges flush

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. Fit the side drip edges over the roofing felt, while the bottom drip edges should be fit under.

Afterwards, attach the asphalt shingles to the roof, starting with the left bottom side of the roof. Read the manufacturer’s instructions to understand how to install the shingles into place properly.

16×20 Shed Plans – Back view

Check out PART 3 of this project to learn how to build the doors. In PART 1 I show you how to build the frame of the shed.

16×20 Shed Plans

This large storage shed is ideal if you need a workshop where you can work on you hobbies, or you just have a lot of items to store.

Thank you for reading our project about free 16×20 shed roof plans and I recommend you to check out the rest of the projects. Don’t forget to LIKE and SHARE our projects with your friends, by using the social media widgets. SUBSCRIBE to be the first that gets our latest projects.

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