12×24 Pole Barn Roof – Free DIY Plans

This step by step diy woodworking project is about free 12×16 pole barn gable roof plans. This is PART 2 of the  compact pole barn project. In this article I show you my take on building the trusses and how to complete the walls and roofing. Read the local building codes and consider buying engineered trusses. Make sure you take a look over the rest of plans to see alternatives and more projects for your garden.

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.



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12×24 Pole Barn Roof – Free DIY Plans

Building a 12x24 pole barn

Building a 12×24 pole barn


[tabs tab1=”Materials” tab2=”Tools” tab3=”Time”]

[tab id=1]

  • F – 2 pieces of 2×4 lumber – 90″ long, 1 piece – 144″ long, 1 piece – 28 3/4″ long 13xTRUSS
  • H – 16 pieces of 1/2″ OSB – 48″x96″ long, 4 pieces – 18″x96″ long, 2 pieces – 48″x48″ long, 2 pieces – 43 3/4″x48″ long, 2 pieces – 9 1/2″x29 1/4″ long, 4 pieces – 24″x48″ long, 1 piece – 5 1/2″x96″ long WALL SHEETS
  • I – 20 pieces of 2×4 lumber – 108″ long, 10 pieces – 96″ long PURLINS
  • I – 6 pieces of 1/2″ plywood – 48″x96″ long, 2 pieces – 24″x48″ long, 6 pieces – 43″x96″ long, 2 pieces – 24″x43″ long ROOF SHEETS*
  • J – 2 pieces of 1×6 lumber – 91 3/4″ long, 4 pieces – 108″ long, 2 pieces – 96″ long TRIMS
  • K – 270 sq ft of metal sheets ROOFING
  • L – 6 pieces of 2×4 lumber – 96″ long BRACES

  • 47 pieces of 2×4 lumber – 8 ft
  • 13 pieces of 2×4 lumber – 12 ft
  • 20 pieces of 2×4 lumber – 10 ft
  • 6 pieces of 1×6 lumber – 10 ft
  • 4 pieces of 1×6 lumber – 8 ft
  • 22 pieces of 1/2″ OSB – 4’x8′
  • 13 pieces of 1/2″ plywood – 4×8′ *
  • house wrap
  • 275 sq ft of metal sheets / asphalt shingles
  • 2 1/2″ screws
  • 1 5/8″ screws
  • Truss plans, Truss plate
  • Truss ties
  • strong tie plate screws

[tab id=2]

 Hammer, Tape measure, Framing square, Post hole digger, Level

 Miter saw, Drill machinery, Screwdriver, Sander

 Safety Gloves, Safety Glasses

[tab id=3]

 One week





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How to build a 12×24 pole barn roof

Rafters - 12 ft truss

Rafters – 12 ft truss

I recommend you buy engineered trusses, as they give you a good balance between costs and benefits. They will give you instructions on the span you need to leave between them and on the thickness of the truss carriers.

However, I will show you my take on building the trusses by yourself. Remember to read the local codes so you can make adjustments if needed. The first step is to build the rafters for the trusses. Use 2×4 lumber and make a 25 degree cut to one end.

Assembling the trusses

Assembling the trusses

Lay the rafters on a level surface and leave no gaps between the components. Align everything with attention and lock everything together tightly with strong tie plates.

Side panels - 12x24 pole barn

Side panels – 12×24 pole barn

Fit the 1/2″ OSB sheets to the sides of the pole barn. Align the edges flush and leave no gaps between the sheets. Use 6d nails to secure the sheets to the girts, every 8″.

Fitting the roof trusses

Fitting the roof trusses

Fit the trusses to the top of the pole barn, every 2 ft on center. Plumb the trusses with a spirit level and lock the to the carrier beams with rafter ties.

Back wall osb panels

Back wall osb panels

Fit the 1/2″ OSB sheets to the front of the pole barn. Insert 6d nails to lock them into place tightly.

Front wall panels

Front wall panels

Fit the sheets to the front of the pole barn. Make the cuts so you can attach the sheets around the door opening.

Fitting the siding sheets to the exterior of the pole barn

Fitting the siding sheets to the exterior of the pole barn

Cover the exterior of the pole barn with house wrap and then install the siding. You can choose from lots of siding products, so make sure you choose the one that suits your needs best.

Truss base supports

Truss base supports

Fit the 2×4 supports to lock the bottom rafters together and thus enhance the rigidity of the roof structure. Use 2 1/2″ screws to attach the supports into place.

Fitting the roof purlins

Fitting the roof purlins

Fit the 2×4 purlins to the top of the roof, every 2′ on center. You can adjust the overhangs to suit your needs.

Roof sheets - 12x24 pole barn

Roof sheets – 12×24 pole barn

This step is optional. If you go for metal sheets you install them directly to the purlins. However, you could fit 1/2″ plywood sheets and go for asphalt shingles. Align the edges with attention and secure the sheets to the purlins with 1 5/8″ screws, every 8″ on center.

Front and back roof trims - 12x24 pole barn

Front and back roof trims – 12×24 pole barn

Use 1×6 lumber for the front and back roof trusses. Make the angle cut to one end of the trims and lock them into place with 2″ nails.

Side roof trims

Side roof trims

Fit the 1×6 slats to the sides of the roof. This will enhance the look of your pole barn. Also, you can install blocking slats between the trusses and also a soffit.

Roofing for 12x24 shed

Roofing for 12×24 shed

Install the metal sheets / asphalt shingles to the top of the pole barn. Read the manufacturer’s instructions so you install the roofing in a professional manner.

12x24 Pole Barn Plans - back view

12×24 Pole Barn Plans – back view

Last but not least, you need to take care of the finishing touches. Remember to take a look over PART 1 of the free plans, to get access to the cut / shopping lists and to the instructions regarding the frame of the barn.

12x24 Pole Barn Plans - front view

12×24 Pole Barn Plans – front view

Top Tip: Check out the rest of the shed projects for more inspiration for your backyard. Take a look over my other pole barn project, if you need to build a 16×24 shelter. See all my post frame projects HERE.



This woodworking project was about 12×16 pole barn 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.





  1. Rick
    • Ovidiu

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