Abstract: A building material includes a first segment of a grass; a second segment of the grass; and a first joint element in the first segment that engages with a corresponding second joint element in the second segment, so that the segments form a strip. The grass may be bamboo. A board includes a plurality of bamboo segments, joined together end-to-end with joint elements to form strips; a plurality of strips, attached together to form panels; and a plurality of panels, attached together to form the board. The strips and panels are laminated together with an exterior grade, low formaldehyde, low-urea-content adhesive.