How to Install Decking Boards for a Curve

What You'll Need
Hand Gloves
Safety Goggles
Face Mask
Circular Saw
Reciprocating Saw
Power screwdriver with more than 25mm shaft bit to fix T-Clips
Power Sander
Rust-proof Screws
Support Rails or Joists
New Decking Boards
Marine Plywood, 3/4 inch Thick

If you need to install decking made of composite material or wood for a curve, you should have the right tools to do the job. With the right tools, installing decking boards for a curve becomes relatively easy and you can complete the job in a matter of hours. Here are some easy-to-follow steps to install decking boards for a curve.

Step 1 – Get the Area Ready

Wear your working clothes and protective gear, and then bring all your tools and materials to your working area. You need to remove all unnecessary objects from your working area to make it easier for you to move around and do your work. After clearing your working area, check the foundation of your decking. Ensure that the foundation is well-prepared, preferably concrete, and the joists are firmly attached across the support posts.

Step 2 – Planning and Laying the Curvature

Plan the coverage of the deck in a curved design. The first step is to extend the length of joists to cover the space where the circular deck has to stand. Locate the center joist over the whole expanse of the deck by measuring the central point diagonally across corners and drill a hole on top of it. Secure one side of the trammel with a nail into the hole and turn the other side with pencil across the corners of the deck to create a circular marking. The trammel works as one big compass. Cut the trammel mark along the joists using a reciprocating saw. Screw header boards in between the end of the joists with a slight protrusion. Mark again with the trammel, this time passing through the top of the header board to form the guide for the curvature of the deck. Cut the header boards along the marker line with a jigsaw.

Cut a portion of the marine plywood at the same width to that of the header board. Soak the marine plywood in water to make it more pliable. Apply adhesive and fix it into the curve with 2-inch screws. 

Install the boards on top of the deck and secure them using T-Clips. Insert the subsequent boards under the extended arm of the T-Clip attached to the joists. Use a hammer to slip each board into place. Tap the decking board to put it into place under the T-Clip arm. Do this activity to the rest of the boards. Let the boards extend beyond the curvature.

Note the original location of the trammel hole at the center of the deck. Make a reference on top of the fixed board and let someone hold one end while you trace the pencil at the other end of the trammel to mark the curve on top of the extended boards. Cut the boards along the line using a jigsaw to form the curved deck. Make a fine finish of the cut ends by using the power sander.

Step 5 – Finishing up

Remove all wood debris and other waste materials from your deck and put them in the garbage bin. Put away all reusable materials for future use.