16x18 Lean to Pavilion Roof Plans

This step by step diy woodworking project is about a 16×18 lean to pavilion roof plans. This is PART 2 of the pavilion project, where I show you how to build the lean to roof structure and how to attach the decorative trims. Check out the codes before building the pavilion, to make sure it complies with the local regulations. Take a look over the rest of my woodworking plans, if you want to get more building inspiration. Premium Plans for this project available in the SHOP.

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

Building a Lean to Roof for a 16×24 Pavilion

Building a 16×18 lean to pavilion

Cut & Shopping Lists

E – 3 pieces of 6×6 lumber – 23 5/8 long, 3 pieces – 52 3/4″ long, 4 pieces – 11 ft long SUPPORTS & RIDGE BEAMS
F – 4 pieces of 6×6 lumber – 48″ long, 6 pieces – 33 1/4″ long BRACES
G – 12 pieces of 2×6 lumber – 234″ long RAFTERS
H – 4 pieces of 1×8 lumber – 12 ft long, 2 pieces – 91 1/2″ long, 2 pieces – 10 ft TRIMS
I – 8 pieces of 1/2″ plywood – 48″x96″ long, 2 pieces – 48″x48″ long, 2 pieces – 48″x72″ long, 2 pieces – 24″x48″ long, 2 pieces – 42″x96″ long, 1 piece – 42″x48″ long, 1 piece – 24″x42″ long ROOF SHEETS
J – 300 sq ft of tar paper, 300 sq ft of asphalt shingles ROOFING

4 pieces of 6×6 lumber – 12 ft
8 pieces of 6×6 lumber – 8 ft
12 pieces of 2×6 lumber – 20 ft
14 pieces of 1/2″ plywood – 4’x8′
4 pieces of 1×8 lumber – 12 ft
2 pieces of 1×8 lumber – 10 ft
2 pieces of 1×8 lumber – 8 ft
300 sq ft of tar paper, 300 sq ft of asphalt shingles
40 pieces of 5 1/2″ screws
wood glue, stain/paint

Tools

Hammer, Tape measure, Framing square, Level

Miter saw, Drill machinery, Screwdriver, Sander

Safety Gloves, Safety Glasses

Time

One day

PART 1: 16×18 Lean to Pavilion Plans
PART 2: 16×18 Lean to Pavilion Roof Plans

How to build a 16×18 picnic shelter roof

Fitting-the-ridge-beam-supports

The first step of the project is to fit the 6×6 supports for the ridge beams. Use 2 L ties for the tall supports and post to beam connectors for the middle supports. Center the short supports to the middle of the cross-beams. Plumb the supports with a spirit level. Insert 2 1/2″ structural screws to lock the supports into place.

Fitting-the-ridge-beams

Fit the ridge beams to the supports, making sure you have 24″ equal overhangs on both sides. Use post to beam connectors and 2 1/2″ structural screws.

Ridge beam braces

Use 6×6 lumber for the diagonal braces. Make 45 degree cuts to both ends of the braces and then set them to the frame of the pavilion. Drill pilot holes through the braces and insert 5 1/2″ screws into the frame of the pavilion.

Middle ridge beam braces

Fit the braces to the middle ridge beam. Fit the braces into place, making sure the supports are plumb. Drill pilot holes and insert 5 1/2″ screws to lock them into place tightly.

Rafters

Use 2×6 lumber for the 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

Fit the rafters to the top of the pavilion, using the information from the diagram. It is important to space the rafters properly (every 24″ on center), otherwise you won’t be able to attach the roofing sheets. Use rafters ties and 1 1/2″ structural screws to lock the beams into place.

Fitting-the-roof-sheets

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

Front-and-back-roof-trims

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

Side-roof-trims-diy

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

Installing-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.

16×18 Lean to Pavilion Plans Free

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-lean-to-pavilion-plans---side-view

16×18-lean-to-pavilion-plans—side-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.

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. Premium Plans for this project available in the SHOP.

This woodworking project was about 16×18 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.