My customer wanted to increase the width of her 3-foot- wide porch by more than a foot, plus add a wavy outer edge that would meander around a large Rose O’Sharon shrub and mimic the winding curves of her cottage garden
The customer chose 5/4 x 6 mahogany for the decking. I tried laying out the framing on 16-inch centers, which looked okay except for a couple of places where a joist landed directly under a gap in the flooring, so I did a quick mockup with some decking scraps and came up with a 16-13/16-inch layout to avoid the problem.
We installed a double ledger along the house, pitched slightly from the inside corner of the porch, and attached hangers for every joist. To maintain an adequate slope away from the house, I had to notch some of the joists where they crossed the block foundation.
Where the band joist stepped out for each section of the curve, I added 45-degree transitions between the projections, then finished off with PVC trim.
Next I rough-cut the boards to length and lined them up on top of the framing; the 16-13/16-inch layout worked out great. I then handed my client a piece of chalk and went out for coffee.
When I returned, she had drawn the whimsical pattern she wanted without any meddling from me. We refined the curve on either side of the steps for a smooth transition, and I stacked the boards for installation.
I cut the curved ends with a jigsaw, setting each successive piece in place to mark where the curve of the previous board ended.