Abstract: Log siding for an existing structure to give the appearance of traditional full log construction. The corner pieces are preformed in two cooperating shapes to fit snugly together at the corners of the structure. One type of corner piece has three perpendicular planes at its inner end, to abut against the corner of the structure. The second corner piece has concave arcs at its inner end, to fit snugly against the rounded surfaces of the first corner pieces. The siding pieces are square cut at one end of each wall to fit against the end of the first type of corner piece and are cut in concave arcs at the opposite end of each wall to fit snugly against the rounded shapes of the logs at the corner. The siding can be speedily erected at the site with a minimum of field cutting.