This step by step diy woodworking project is about a 20×12 outdoor gable pavilion plans. This is a large pavilion with a super wide roof that makes the perfect structure to cover a pool or a relaxation area. This pavilion features a sturdy structure with an elegant design that is suitable for any backyard. The roof pitch is 4:12. Take a look over the rest of our 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
20×12 Gable Gazebo – Free DIY Plans
How to build a 20×12 garden gazebo
First, layout the posts for the 20×12 pavilion. Use batter boards and string to determine the location of the posts. Apply the 3-4-5 rule to every corner of the pavilion, so you make sure they are right angled. Make sure the diagonals are equal. Determining the location for the pavilion is essential, as you have to comply with the local building codes. Make sure the surface is level and remove the vegetation layer.
Level the surface with attention. Remove the vegetation layer, as well. Dig 3′ deep holes and 14″ in diameter into the ground with a post hole digger. Align the holes with attention and then fit form tubes. Fit the 6×6 posts with attention and align them using string. Use a spirit level to plumb the posts and then lock them into place with temporarily braces. Fill the tube forms with concrete and let it dry out for a few days.
Use 6×6 lumber for the top rails and for the ridge beams. Mark the cut lines on the beams and then make the cut outs with a circular saw and a chisel. Set the circular saw at 2 3/4″ and then make parallel cuts inside the marked areas. Clean the recess with a chisel and sandpaper.
Fit the top rails to the sides of the pavilion. Align the edges flush. Drill pilot holes through the plates and insert 8″ screws to lock them to the posts. Use 2 screws for each joint. Make sure the corners are square and plumb the posts vertically.
Fit the crossbeams to the top of the pavilion. Make sure the corners are square and align the edges flush. Drill pilot holes and insert 8″ screws to lock the beams into place tightly. Insert 2 screws for each joint.
Build the braces for the base of the pavilion from 6×6 lumber. Use a miter saw to make 45 degree cuts to both ends of the braces. Fit the braces to the posts, after you plumb them vertically. Drill pilot holes and insert 5 1/2″ screws to secure the braces into place tightly (2 for each joint).
Center the 6×6 supports to the top of pavilion. Plumb the supports with a spirit level. Use post to beam connectors to secure the supports to the frame of the pavilion. Secure the L brackets and insert 2 1/2″ structural screws, to lock them into place tightly.
Fit the ridge beam to the supports with post to beam connectors. Make sure the corners are square. Use 2 1/2″ structural screws to lock the connectors into place.
Use 6×6 lumber for the braces. Make 45 degree cuts at both ends of the braces. Secure the braces into place with 5 1/2″ screws. Drill pilot holes before inserting the screws.
Use 2×6 lumber for the rafters. Use a miter saw to make the cuts to the boards. 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 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 side plates and to the ridge beam. Use 1 1/2″ structural screws for the rafter ties.
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.
Fit the 1×8 trims to the sides of the pavilion. Align the edges and insert 2″ nails to lock them to the ends of the rafters.
Fit 1×8 trims to the front and back of the pavilion. Align the edges with attention and insert 2″ nails to lock them into place tightly. Fit the 1×8 trims to the front and back of the pavilion. Lock them into place with 2″ nails.
Cover the roof with tar paper and then install the asphalt shingles. Start installing the shingles from the bottom of the roof up to the top. Make sure you also install the appropriate drip edges around all edges of the roof, so you can seal the shed roof. Read the manufacturer’s instructions for a tight fit.
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.
Last but not least, you need to take care of the finishing touches. Therefore, fill the holes with wood putty and then smooth the surface with 120-220 grit sandpaper.
Top Tip: Apply a few coats of paint or stain to the components, to enhance the look of the project. See all my woodworking plans, sorted by category.
This woodworking project was about 20×12 outdoor gable 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.