20×24 Pavilion Roof Plans

Ovidiu 3 GapDice RANDOM PLAN

This step by step diy woodworking project is about a 20×24 outdoor pavilion roof plans. This is PART 2 of the large rectangular pavilion project, where I show you how to build the gable roof and how to attach the decorative trims. The roof has a 12:6 pitch, but you easily adjust it, if you need something else. 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.



Projects made from these plans




20×24 Pavilion Roof Plans

Building a 20x24 pavilion

Building a 20×24 pavilion


  • F – 44 pieces of 2×6 lumber – 156″ long RAFTERS
  • – 18 pieces of 3/4″ plywood – 48″x96″ long, 6 pieces – 48″x48″ long, 6 pieces – 9 1/44″x96″ long, 2 pieces – 9 1/4″x48″ long ROOF SHEETS
  • H – 4 pieces of 1×8 lumber – 144″ long, 2 pieces – 48″ long, 4 pieces – 157 3/4″ long TRIMS
  • I – 700 sq ft of tar paper, 700 sq ft of asphalt shingles ROOFING

 One day



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How to build a 20×24 pavilion roof

Cutting the rafters - 20x24 pavilion

Cutting the rafters – 20×24 pavilion

Use 2×6 lumber for the rafters. Make 26.5 degree cuts to both ends of the 2×6 rafters. Mark the cut lines to the rafters and then get the job done with a circular saw. Smooth the edges with sandpaper. Make the notches into the rafters, so you can fit them into place tightly.

Fitting the rafters - 20x24 pavilion

Fitting the rafters – 20×24 pavilion

Fit the rafters to the top of the pavilion, using the information from the diagram. It is important to space the rafters properly (every 16″ on center), otherwise you won’t be able to attach the roofing sheets. Use rafters ties to lock the rafters into place.

Fitting the roof sheets - 20x24 pavilion

Fitting the roof sheets – 20×24 pavilion

Use 1/2″ plywood for the roof of the pavilion. Cut the sheets at the right dimensions and then lay them to the top of the pavilion. Leave no gaps between the sheets and then insert 1 5/8″ screws, every 8″ along the rafters, so you can secure them into place tightly.

Side roof trims - 20x24 pavilion

Side roof trims – 20×24 pavilion

Fit 1×8 trims to the sides of the pavilion. Align the edges with attention and insert 2″ nails to lock them into place tightly.

20x24 Pavilion - front and BACK ROOF TRIMS

20×24 Pavilion – front and BACK ROOF TRIMS

Fit the 1×8 trims to the front and back of the pavilion. Make the angle cuts to the trims before locking them into place with 2″ nails.

Fitting the roofing - 20x24 pavilion

Fitting the roofing – 20×24 pavilion

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.

20x24 Pavilion Plans - front view

20×24 Pavilion Plans – front view

Fill the holes with wood putty and let them dry out for a few hours. Smooth the surface with 100-200 grit sandpaper and remove the residues with a damp cloth. Apply a few coats of stain or paint to enhance the look of the pavilion. Make sure you take a look over PART 1 of the project, where I show you how to build the frame of the pavilion.

20x24 Pavilion Plans

20×24 Pavilion Plans

Fill the holes with wood putty and let them dry out for a few hours. Smooth the surface with 100-220 grit sandpaper and remove the residues with a damp cloth.

Top Tip: Apply a few coats of paint or stain to the components, to enhance the look of the project. Make sure you take a look over the rest of my pergola/gazebo/pavilion plans HERE. See all my free woodworking plans (over 1000) HERE.



This woodworking project was about 20×24 outdoor pavilion 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. Feel free to SHARE my plans with your friends.




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  1. Chester MAKOWSKI at - Reply

    I need a 24 Foot (long) x 20 Foot (wide) Pavilion Plan that i can submit for a Building Permit. My Location is Suffok County, NY and the Township Building Department is Brookhaven, NY.
    Can you supply building plans i can submit for a building permit?


    • Ovidiu at - Reply

      I don’t do custom plans.

  2. Ronny Rigsby at - Reply

    Nice! I’m going to build this to go beside my pool for my wife.

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