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Fabricate Mitered Corner Joint

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Built in bar seating is probably one of the most functional and spacing saving features you can add

What happens here

For a clean and strong corner joint, prepare the composite decking boards for a mitered connection. Use a speed square and pencil to accurately mark a 45-degree angle on the end of each board that will form the corner. Cut these angles using a circular saw, ensuring a smooth, straight cut. Next, use a router with an angled V-groove bit to create a deeper mitered channel along the cut edges. This unique joint design, often called a waterfall miter, increases the surface area for adhesive, creating a stronger bond and a virtually invisible seam when joined.

Goal: Prepare composite decking for a seamless mitered corner.

Tools and materials

  • Circular Saw DeWalt — Cutting the mitered angles
  • Composite Decking Boards — To form the mitered corner
  • Pencil — Marking cut lines
  • Router — Creating the V-groove for the mitered joint
  • Router Bit — Cutting the specialized mitered channel
  • Speed Square — Marking precise 45-degree angles