Clinker built (also known as lapstrake) is a method of boat building where the edges of hull planks overlap, called a "land" or "landing." in craft of any size planks. Introduction. clinker (or lapstrake) construction involves the planking of the hull with adjacent planks slightly overlapping one another (in a stepped fashion).. Clinker and carvel – different types of planking introduction. clinker is a method of constructing hulls of boats by fixing wooden planks so that the planks overlap.