So I find I actually love planking! On this particular design, which isn’t actually traditional, it’s easy. You need a piece of plywood long enough to reach from stem to stern, and wide enough to cover from the plank below (or the boat bottom) to the next stringer up. Then epoxy and screw through the lower plank/stringer and just epoxy to the upper. Then trim to size (a power planer works well for this), and on to the next plank. The laps are left a little long, and can be trimmed so a nice, smooth curve later.

The hard part is just getting a piece that’s long and wide enough. The plywood comes in 4’x8′ sheets (ok, slightly larger cuz it’s metric, innit)? So I slice off about a 10″ wide (two, actually), and join them together with epoxy. This joint is called a “scarf”, and is simply a slanted edge-cut (see photo below). Then glue, screw, and trim!

The last plank at the top is called the “sheer strake”. Why do boats have weird names for EVERYTHING?!
These scarfs are cut with a circular saw in a jig to hold the blade at a 4:1 angle. The longer the joint, the stronger, but too long and it doesn’t bend like the rest of the plank so it creates a flat spot in the hull.
After cutting the scarf, epoxy is applied and the joint is lined up… note the wax paper on the floor… and a little weight is applied to keep the joint tight until cured. Not too much pressure or it squeezes out all the epoxy or makes the joint slip!
Plank installed and rought-trimmed. Note there is a piece that goes over the stem at the front, and all the epoxy-filled screw holes will be sanded smooth and painted later. Barrett used to call this the “maximum ugly duckling” phase of boat-building.