Home Pergola 16×18 Pavilion – Gable Roof Plans

16×18 Pavilion – Gable Roof Plans

by Ovidiu


This step by step diy woodworking project is about a 16×18 outdoor pavilion roof plans. This is PART 2 of the compact rectangular pavilion project, where I show you how to build the roof and how to attach the decorative trims. The roof has a 30 degree slope, which you can adjust to suit your needs and the local building codes. 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




16×18 Pavilion – Gable Roof Plans




Cut & Shopping Lists

  • F – 34 pieces of 2×6 lumber – 113 1/4″ long RAFTERS
  • – 6 pieces of 3/4″ plywood – 4’x8′ long, 4 pieces – 4’x4′ long, 4 pieces – 12″x96″ long, 4 pieces – 12″x14″ long, 4 pieces – 14″x96″ long ROOF SHEETS
  • H – 4 pieces of 1×8 lumber – 108″ long, 2 pieces – 115″ long TRIMS
  • I – 400 sq ft of tar paper, 400 sq ft of asphalt shingles ROOFING


 Hammer, Tape measure, Framing square, Level

 Miter saw, Drill machinery, Screwdriver, Sander

 Safety Gloves, Safety Glasses


 One day




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How to build a 16×18 pavilion roof



Use 2×6 lumber for the rafters. Use a miter saw to make the 30 degree cuts at both ends of the beams. Smooth the edges with sandpaper.



Make the notches to the rafters, as shown in the plans. Mark the lines before doing the cuts.



Fit the rafters to the top of the wooden 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 to the beams.

Roof sheets - 16x18 pavilion

Roof sheets – 16×18 pavilion

Use 1/2″ or 3/4″ plywood for the roof of the backyard 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 - 16x18 Pavilion

Side roof trims – 16×18 Pavilion

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

End roof trims

End roof trims

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

Fitting the roofing - 16x18 Pavilion

Fitting the roofing – 16×18 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.

16x18 Pavilion Plans Free - Side view

16×18 Pavilion Plans Free – Side 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.

16x18 Pavilion Plans - Front view

16×18 Pavilion Plans – Front view

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. This is a great addition to your property as it will create a nice shade where you could serve dinner and hang out with your friends.

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 1500) HERE.



This woodworking project was about 16×18 pavilion roof 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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Jay -

I’m interested in building the 16 x 18 pavilion, but the measurements seem to be for a 16x 10. Can you post the correct measurements for a 16 x 18 pavilion.

Jeff -

Rafter notched don’t seem correct for 6×6 ridge beam. Should they only be notched to 2 3/4 vs 3 1/4?

Ovidiu -

They are correct, you refer to a dimension that is in diagonal not in horizontal.

candelario cruz -

lo quiero de dos agas

candelario cruz -

lo quiero pero de 20×20


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