Ribs were cut from ½ polystyrene insulation. All were cut 4 long with a 45° angle, forming a trapezoid with a 2 dimension on the base. We set up a jig on the table saw to keep the foam in place while cutting. This was only partially successful, since the saw blade had a tendency to grab and melt the foam.
Since the insulation is pink, we painted each strip with a computer matched (to the Kevlar yellow) latex exterior paint to prevent the pink from showing through.
A line 5 from the bottom of the gunwales was drawn with a dry-erase pen. All strips were cut to length on that line. First was on the center evenly spaced after that (9 strips = 8 spaces for 96 inches spacing at about 12 each). The strips were hot-glued at ends and center.
5 s-glass was then laid over each strip and wetted out (yes, they will bend that much!).
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