Abstract: An endpiece and method for siding a wall to simulate wood log construction are described. A generally cylindrical core (101) of the endpiece (100) has a curved surface (103), and a flat surface (105). A decorative skin (111) attached to the curved surface (103) has a cross-sectional arc that is greater than one hundred and eighty degrees. When an endpiece (100) is installed on a plank (200), a spline (117) that attaches along a lateral edge (109) of the endpiece interlocks with a bottom spline (215) of a plank (200). Also, a first offset (113) of the decorative skin (111) engages an upper lateral edge (207) of the plank (200). An end cap (301) attaches to a surface formed by an endpiece surface (305) and a plank surface (307).