Thoughts on Lapstrake Planking

The first boat to come out of our shop in New Brunswick, Canada, was a carvel-planked steam launch completed in 1976. We went on to build numerous boats, many of which were lapstrake-planked. As I think back to those early years, I recall that the books and articles I depended on to increase my knowledge of lapstrake planking left many questions unanswered, even though in some ways that type of planking is more forgiving than carvel.

What follows are some answers that time and experience have cleared up for me, and I hope they will help take some of the mystery out of lapstrake planking for others. I will focus here on planking in which only one edge of each plank is beveled, which is by far the most common method and the easiest to understand.

The drawings all show a hull built upside down, which is a common method, but the references can be confusing: just as starboard is always starboard and port is always port, “up” is always toward the sheer and “down” is always toward the keel, regardless of the boat’s orientation on the building jig.

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