This step by step diy project is about 16×20 gambrel shed roof plans. This is PART 2 of the free large gambrel shed plans, where I show you how to build the roof. If you need even more storage space, you can create a loft to the top of the storage shed. Make sure you check the local codes and make adjustments to the plans, if required. 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. See all my Premium Plans HERE.
Projects made from these plans
16×20 Gambrel Shed Roof Plans
Building-a-16×20-barn-shed
Cut & Shopping Lists
- H – 4 pieces of T1-11 siding – 48″x81 5/8″ long, 4 pieces – 48″x101 1/2″ long SIDING
- I – 4 pieces of 2×6 lumber – 76 1/2″ long 16xTRUSS
- J – 4 pieces of 2×4 lumber – 53 1/8″ long, 4 pieces – 74 7/8″ long, 4 pieces – 84 3/4″ long, 2 pieces – 94″ long SUPPORTS
- K – 8 pieces of 2×6 lumber – 76 1/2″ long, 16 pieces – 6 3/8″ long 2xOVERHANG
- L – 8 piece of 3/4″ plywood – 10″x76 1/2″ long, 8 pieces – 48″x96″ long, 4 piece – 48″x48″ long, 8 pieces – 28 1/2″x96″ long, 4 pieces – 28 1/2″x48″ long 2xROOF
- M – 8 pieces of 1×8 lumber – 77″ long TRIMS
- N – 550 sq ft of tar paper, 550 sq ft of asphalt shingles ROOFING
- 4 pieces of 5/8″ T1-11 – 4’x10′
- 4 pieces of 5/8″ T1-11 – 4’x8′
- 14 pieces of 2×4 lumber – 8′
- 80 pieces of 2×6 lumber – 8′
- 8 pieces of 1×8 lumber – 8′
- 1 piece of 1/2″ plywood – 4’x8′
- 22 pieces of 3/4″ plywood – 4’x8′
- 550 sq ft of tar paper, 550 sq ft of asphalt shingles
- rafter ties
- tar paper
- 6d nails, 2 1/2″ screws, 3 1/2″ screws
- wood filler , wood glue, stain/paint
Tools
Hammer, Tape measure, Framing square, Level
Miter saw, Drill machinery, Screwdriver, Sander
Time
One week
Related
- PART 1: 16×20 Barn Shed Plans
- PART 2: 16×20 Barn Shed Roof Plans
- PART 3: 16×20 Double Door Plans
Building a 16×20 gambrel shed roof
Building-the-rafters—large-barn-shed
The first step of the project is to build the rafters for the gambrel shed. Use a miter saw to make 22.5 degrees cuts to both ends of the 2×6 lumber and lay them on a level surface.
Fitting the gussets
Lay the rafters on a level surface and leave no gaps between them. Use 1/2″ plywood for the gussets and use the information from the diagram to get the job done. Use 1 5/8″ screws to lock the gussets over the rafters. Attach the gussets on both sides of the trusses, to reinforce them.
Fitting the trusses
Fitting-the-trusses-16×20
Fit the trusses to the top of the shed and place the every 16″ on center. Plumb the trusses with a spirit level and use rafter ties to lock them into place tightly. Use rafter ties on both sides of the trusses (4 ties for each truss).
Gambrel end supports
Fit 2×4 supports to front and back gambrel ends of the shed. Use the diagram to make the cuts to the supports, drill pocket holes at both ends and insert 2 1/2″ screws to lock them into place tightly.
Gambrel end sheets
Use T1-11 siding for the front and back gambrel end panels. Use a saw to cut the panels at the right size and dimensions and then align the edges flush. Insert 6-8d nails, every 8″ along the framing. Leave no gaps between the sheets, for a professional result.
Fitting the overhangs
Building the overhangs
Use rafters and 2×4 blockings for the front and back overhangs. You can adjust the size of the overhangs to suit your needs. Drill pilot holes through the rafters and insert 2 1/2″ screws into the blockings.
Fitting the overhangs
Fit the overhangs to the front and to the back of the shed. Align the edges with attention, drill pilot holes and insert 3 1/2″ screws to lock them into place tightly.
Fitting the roof sheets
Cut the roof sheets at the right dimensions and then fit them to the top of the shed. Align the edges with attention and insert the 1 5/8″ screws, every 8″ along the framing.
Fitting the roof trims
Fitting the roof trims
Fit the 1×8 trims to the front and to the back of the shed roof. Cut both ends of the trims at 67.5 degrees (set the miter saw at 22.5 degrees). Use 2″ nails to lock the trims into place tightly. Leave no gaps between the trims for a professional result.
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.
16×20 Gambrel Shed Plans – Back view
I have lots of other shed projects on the site so I recommend you to browse through all alternatives before starting the building project. See all my shed projects HERE. Moreover, check out PART 1 of the shed, so you learn how to build the frame of the shed. Check out PART 3 of the shed, so you learn how to build the double doors.
This woodworking project was about 16×20 barn shed roof 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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10 comments
You only have 1 pc of 1/2” plywood listed for the gussets and dont say wether to do both sides. Just a heads up.
What would the measurements and angles be if the roof was half of the height in this tutorial?
I get the following error when I try to print from either Chrome or MS Edge (on windows PC).
“You are not allowed to print preview this page”
Are you using the print widget? It works fine for me
I had to go to your FAQ to find out why that widget bar wasn’t showing up on the left at all. (Ad Blocker).
Once I disabled it, I was able to generate a printable version using the widget.
Thank you.
Quick question: On the gambrel-end supports. Is there a reason you went with 7 supports instead of going with 16″ on center…which would be 10 on each end if my math is right.
They are 24″ on center
I am looking for a complete set of 16’ X 20’ barn loft shed plans. I am going to make it in to a cabin / camp. Not sure on this size so need other sizes so can compare material list cost.
12’ X 20’
14’ X 24’.
I really just need material lists then get prints for size going with. Total cost for me has to include insulation, insulated windows electrical and finishing out the inside etc.
Thanks
I’m in the process of building the shed. I’m about to start on the roof trusses. I thought I saw a different set of plans that said you have to run ceiling joist across to support the roof. I don’t see this in these plans. I was hoping to have a mostly open interior other than a 10-ft Loft. Can the roof trusses span 16 ft without any other support.
Absolutely, you can build a 16 ft wide gambrel shed using trusses without ceiling joists running across the shed. Instead, you’ll use a more robust truss design to support the roof and transfer loads directly to the walls. This approach gives you an open interior space, perfect for maximizing storage or creating a more spacious feel. Just make sure your trusses are properly engineered to handle the load—consulting with a structural engineer or using pre-designed trusses from a reputable manufacturer will help ensure everything is safe and sturdy.